-
OFFSHORE SERVICE SPECIFICATION
DET NORSKE VERITAS AS
The content of this service document is the subject of
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(DNV). The useraccepts that it is prohibited by anyone else but DNV
and/or its licensees to offer and/or perform classification,
certification and/orverification services, including the issuance
of certificates and/or declarations of conformity, wholly or
partly, on the basis of and/orpursuant to this document whether
free of charge or chargeable, without DNV's prior written consent.
DNV is not responsible for theconsequences arising from any use of
this document by others.
The electronic pdf version of this document found through
http://www.dnv.com is the officially binding version
DNV-OSS-101
Rules for Classification of Offshore Drilling and Support
Units
OCTOBER 2013
-
Det Norske Veritas AS October 2013
Any comments may be sent by e-mail to [email protected]
If any person suffers loss or damage which is proved to have
been caused by any negligent act or omission of Det Norske Veritas,
then Det Norske Veritas shall pay compensation tosuch person for
his proved direct loss or damage. However, the compensation shall
not exceed an amount equal to ten times the fee charged for the
service in question, provided thatthe maximum compensation shall
never exceed USD 2 million.In this provision "Det Norske Veritas"
shall mean the Foundation Det Norske Veritas as well as all its
subsidiaries, directors, officers, employees, agents and any other
acting on behalfof Det Norske Veritas.
FOREWORD
DNV is a global provider of knowledge for managing risk. Today,
safe and responsible business conduct is both a licenseto operate
and a competitive advantage. Our core competence is to identify,
assess, and advise on risk management. Fromour leading position in
certification, classification, verification, and training, we
develop and apply standards and bestpractices. This helps our
customers safely and responsibly improve their business
performance. DNV is an independentorganisation with dedicated risk
professionals in more than 100 countries, with the purpose of
safeguarding life, propertyand the environment.
DNV service documents consist of among others the following
types of documents:
Service Specifications. Procedural requirements.
Standards. Technical requirements.
Recommended Practices. Guidance.
The Standards and Recommended Practices are offered within the
following areas:
A) Qualification, Quality and Safety Methodology
B) Materials Technology
C) Structures
D) Systems
E) Special Facilities
F) Pipelines and Risers
G) Asset Operation
H) Marine Operations
J) Cleaner Energy
O) Subsea Systems
U) Unconventional Oil & Gas
-
DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
CHANGES CURRENT Page 3
CHANGES CURRENT
General
This document supersedes DNV-OSS-101, October 2012.
Text affected by the main changes in this edition is highlighted
in red colour. However, if the changes involvea whole chapter,
section or sub-section, normally only the title will be in red
colour.
Main changes October 2013, entering into force 1 April 2014
General
Specific for this edition
Significant changes have been highlighted throughout the
document. For clarity, the following changes havenot been
highlighted:
content based on existing requirements from reference documents
interpretations based on old rule requirements editorial
restructuring and moves.
The structure of this document has been converted to decimal
numbering. Older references to thisdocument may normally be
interpreted by analogy to this example:
DNV-OSS-101 Ch.2 Sec.3 D506 is now DNV-OSS-101 Ch.2 Sec.3
[4.5.6].
The content has been balanced by describing survey requirements
applicable for all units, followed byvessel type specific
requirements for all periodical surveys and applicable areas
(typically with regard tohull and equipment).
Periodical survey requirements have been aligned with the Rules
for Classification of Ships (Rules forShips).
Gas turbine inspection requirements have been covered. The
position/ use of DNV-OSS-101 with regard to DNV-OSS-104 has been
clarified. Service unit survey requirements have been clarified and
focused, among others by including specific sub-
section on scope. A new App.B on mooring equipment acceptance
standard guidance, originally placed inside the main text,
has been included. More extensive descriptions with regard to
our follow up on ageing units have been included. Descriptions for
alternative survey arrangements have been updated.
Ch.1 General
Definition of EU Mutual Recognition Type Approval Certificate
has been included.
Ch.1 Sec.3 Classification scope and notations
The overview of class notations in [2] has been updated.
Ch.2 General
Scope of classification with regard to structural design has
been clarified in Sec.2 [3] and Sec.1 [4].
Ch.3 General
The text has been restructured by:
1) Restructuring content of Sec.2 and previous Sec.4 A.
2) Deleting previous Sec.3 on alternative survey arrangements
and service suppliers and moving thecontent to respectively Sec.7
and Sec.8.
3) Separating Miscellaneous main class surveys from Sec.3.
Ch.3 Sec.1 General provisions
Updated overview table of periodical surveys.
Ch.3 Sec.2 General requirements for structure and machinery
surveys
Aligned with relevant description of Rules for Ships. Reference
to RP for bonded patch repairs.
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
CHANGES CURRENT Page 4
Ch.3 Sec.3 (previous Sec.4) Periodical survey extent for main
class
[1] General:
Updated IIP scope table.
[2] Annual survey main class:
Content has been rewritten based on applicable Rules for Ships
and IACS. The text has been restructured as described above.
[3] Intermediate survey:
Content has been rewritten based on applicable Rules for Ships
and IACS. The text has been restructured as described above.
Specific requirements for units > 10 years have been added.
[4] Renewal survey, structure and equipment:
Content has been rewritten based on applicable Rules for Ships
and IACS. The text has been restructured as described above.
Thickness measurement tables for different vessel types have been
included. Special, primary and secondary areas for inspection for
different vessel types have been listed. Tail shaft sealing
inspection for non-self-propelled units has been included.
[5] Renewal survey, machinery and safety systems:
Content has been rewritten based on applicable Rules for Ships
and IACS. The text has been restructured as described above.
Ch.3 Sec.4 Miscellaneous main class surveys
The text has been cleaned up by to a larger degree referring to
relevant Rules for Ships.
Ch.3 Sec.5 Periodical survey extent for additional service
notations
Specific survey requirements for the different service notations
have been updated. Scope for each service notation has been
clarified. Wind Turbine Installation units and Offshore Support
units have been included.
Ch.3 Sec.6 Optional class notation surveys
Several requirements related to the DRILL notation have been
updated. DEICE has been removed. WINTERIZATION and ISDS
requirements have been included. BWM references have been completed
Several notations have been updated by in a large degree referring
to the Rules for Ships.
Ch.3 Sec.7 Alternative survey arrangements
Alternative survey requirements for drilling equipment have been
described.
Ch.3 Sec.8 Surveys performed by approved companies
This new section contains existing requirements on service
suppliers previously found in Sec.3.
In addition to the above stated main changes, editorial
corrections may have been made.
Editorial Corrections
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 5
CONTENTS
CHANGES CURRENT
...................................................................................................................
3
CH. 1 PRINCIPLES AND PROCEDURES FOR CLASSIFICATION............
14
Sec. 1
Introduction.......................................................................................................................
14
1 Introduction
.............................................................................................................................................
14
1.1 General
...........................................................................................................................................
141.2 Organisation of
DNV-OSS-101.....................................................................................................
141.3 Objects
covered..............................................................................................................................
14
2 Definitions
................................................................................................................................................
14
2.1 Verbal forms
..................................................................................................................................
142.2
Definitions......................................................................................................................................
14
3 Normative references
..............................................................................................................................
18
3.1 Normative references
.....................................................................................................................
183.2 DNV reference
documents.............................................................................................................
183.3 Other references
.............................................................................................................................
19
4 Informative
references............................................................................................................................
19
4.1 DNV informative
references..........................................................................................................
194.2 Other references
.............................................................................................................................
19
5
Abbreviations...........................................................................................................................................
20
5.1 General
...........................................................................................................................................
20
Sec. 2 Classification principles
...................................................................................................
21
1 The classification concept
.......................................................................................................................
21
1.1
Introduction....................................................................................................................................
211.2 Applicable rules
.............................................................................................................................
211.3 Basis for assignment of class
.........................................................................................................
221.4 Basis for maintenance of
class.......................................................................................................
221.5
Documentation...............................................................................................................................
221.6 Disclosure of information
..............................................................................................................
231.7 Access
............................................................................................................................................
241.8 Calibration of equipment
...............................................................................................................
241.9 Service suppliers
............................................................................................................................
241.10 Limitation of DNV's
responsibility................................................................................................
24
2 Appeals
.....................................................................................................................................................
24
2.1 Decisions taken by the society
......................................................................................................
24
3 Statutory certification
.............................................................................................................................
25
3.1 General
..........................................................................................................................................
253.2 Service suppliers
............................................................................................................................
25
Sec. 3 Classification scope and
notations...................................................................................
26
1 Scope of
classification..............................................................................................................................
26
1.1 General
...........................................................................................................................................
261.2 Rule parts
.......................................................................................................................................
261.3 Rule particulars
..............................................................................................................................
26
2 Class notations
.........................................................................................................................................
26
2.1 General
...........................................................................................................................................
262.2 Construction
symbols.....................................................................................................................
262.3 Main character of class
..................................................................................................................
272.4 Basic design
notations....................................................................................................................
272.5 Service
notations............................................................................................................................
272.6 Optional class notations related to special equipment and
systems............................................... 272.7
Optional class notations related to cold climate operation
............................................................ 282.8
Special feature notations
................................................................................................................
282.9 Service
restrictions.........................................................................................................................
292.10 Compliance with coastal state legislation
......................................................................................
292.11 Combination of
notations...............................................................................................................
29
Sec. 4 Assignment of class
...........................................................................................................
30
1 Assignment of class - new vessels
...........................................................................................................
30
1.1 General
...........................................................................................................................................
301.2 Requirements for builder or designer
............................................................................................
30
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 6
1.3 Applicable rules
.............................................................................................................................
301.4 Plan approval
.................................................................................................................................
311.5 Survey during construction
............................................................................................................
321.6 Installation of systems and
equipment...........................................................................................
321.7 Testing and commissioning
...........................................................................................................
32
2 Assignment of class - existing
vessels.....................................................................................................
33
2.1 General
...........................................................................................................................................
332.2 Applicable rules
.............................................................................................................................
332.3 Design approval
.............................................................................................................................
332.4 Class entry survey
..........................................................................................................................
33
3 The class certificate
.................................................................................................................................
33
3.1 General
...........................................................................................................................................
333.2 Late commissioning
.......................................................................................................................
34
4 The register of vessels
.............................................................................................................................
34
4.1 General
...........................................................................................................................................
34
Sec. 5 Retention of class
..............................................................................................................
35
1 Conditions for retention of class
............................................................................................................
35
1.1 General requirements
.....................................................................................................................
351.2 The customers obligations
............................................................................................................
351.3
Maintenance...................................................................................................................................
35
2 Classification society involvement
.........................................................................................................
36
2.1 Applicable rules
.............................................................................................................................
362.2
Surveys...........................................................................................................................................
362.3 Conditions and memoranda
...........................................................................................................
362.4 Survey reports and survey
status....................................................................................................
372.5 Damage and
repairs........................................................................................................................
372.6 Conversions and alterations
...........................................................................................................
382.7 Temporary
equipment....................................................................................................................
38
3 Endorsement and renewal of the class certificate
................................................................................
38
3.1 Endorsement of the class certificate
..............................................................................................
383.2 Renewal of the class
certificate......................................................................................................
39
4 Suspension and withdrawal of class
......................................................................................................
39
4.1 General
...........................................................................................................................................
394.2 Suspension of class
........................................................................................................................
404.3 Reinstatement following class
suspension.....................................................................................
404.4 Withdrawal of
class........................................................................................................................
404.5 Re-assignment of class following class withdrawal
......................................................................
41
5 Change of owner or
manager.................................................................................................................
41
5.1 General
...........................................................................................................................................
41
6 Force
majeure..........................................................................................................................................
41
6.1 General
...........................................................................................................................................
41
Sec. 6 Certification of materials, components and systems
..................................................... 42
1 General
.....................................................................................................................................................
42
1.1 General
...........................................................................................................................................
421.2 Requirements for manufacturer
.....................................................................................................
42
2 The Classification involvement
..............................................................................................................
42
2.1 General
...........................................................................................................................................
422.2 Plan approval
.................................................................................................................................
432.3 Type approval
................................................................................................................................
432.4 Survey
............................................................................................................................................
442.5 Manufacturing survey arrangement
...............................................................................................
44
3 Suspension and withdrawal of
certificates............................................................................................
44
3.1 General
...........................................................................................................................................
44
Sec. 7 Legal provisions
................................................................................................................
45
1 Liability and jurisdiction
........................................................................................................................
45
1.1 Limited liability
.............................................................................................................................
451.2 Use by other parties
.......................................................................................................................
451.3 Governing
law................................................................................................................................
451.4 Venue
.............................................................................................................................................
45
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 7
CH. 2 DESIGN AND CONSTRUCTION
PROVISIONS................................... 46
Sec. 1 Design and construction requirements for 1A1 MOU main
class................................ 46
1 General
.....................................................................................................................................................
46
1.1
Introduction....................................................................................................................................
461.2 Technical reference
documents......................................................................................................
461.3 General assumptions
......................................................................................................................
46
2 Safety principles and
arrangement........................................................................................................
47
2.1 General
...........................................................................................................................................
472.2 Design principles
...........................................................................................................................
472.3 Arrangement
..................................................................................................................................
472.4 Escape and evacuation
...................................................................................................................
47
3 Materials
..................................................................................................................................................
47
3.1 Technical
requirements..................................................................................................................
473.2 Supplementary classification requirements
...................................................................................
47
4 Structural design
.....................................................................................................................................
47
4.1
Scope..............................................................................................................................................
474.2 Technical
requirements..................................................................................................................
48
5 Fabrication and testing of offshore structures
.....................................................................................
48
5.1 Technical
requirements..................................................................................................................
485.2 Supplementary classification requirements
...................................................................................
48
6 Stability and watertight/weathertight
integrity....................................................................................
48
6.1 Technical
requirements..................................................................................................................
48
7 Mooring and towing
................................................................................................................................
48
7.1 General
...........................................................................................................................................
487.2 Ship-shaped units
...........................................................................................................................
487.3 Column-stabilised units
.................................................................................................................
497.4 Self-elevating units
........................................................................................................................
497.5 Towing
...........................................................................................................................................
497.6 Supplementary classification requirements
...................................................................................
49
8 Marine and machinery systems and
equipment...................................................................................
49
8.1 Technical
requirements..................................................................................................................
498.2 Supplementary classification requirements
...................................................................................
49
9 Electrical systems and
equipment..........................................................................................................
49
9.1 Technical
requirements..................................................................................................................
499.2 Supplementary classification requirements
...................................................................................
50
10 Instrumentation and telecommunication
systems................................................................................
50
10.1 Technical
requirements..................................................................................................................
5010.2 Supplementary classification requirements
...................................................................................
50
11 Fire protection
.........................................................................................................................................
50
11.1 Technical
requirements..................................................................................................................
5011.2 Supplementary classification requirements
...................................................................................
50
12 Preparation for surveys and inspections on location
...........................................................................
50
12.1 General
...........................................................................................................................................
50
13 Summary of technical reference standards
..........................................................................................
51
13.1 General
...........................................................................................................................................
51
Sec. 2 Supplementary requirements for drilling units
.............................................................
53
1 General
.....................................................................................................................................................
53
1.1
Introduction....................................................................................................................................
531.2
Scope..............................................................................................................................................
53
2 Safety principles and
arrangement........................................................................................................
53
2.1 General
...........................................................................................................................................
532.2 Arrangement
.................................................................................................................................
532.3 Area
classification..........................................................................................................................
532.4 Emergency
shutdown.....................................................................................................................
532.5 Escape, evacuation and communication
........................................................................................
53
3 Structural design
.....................................................................................................................................
53
3.1 General
...........................................................................................................................................
53
4 Fire protection
.........................................................................................................................................
54
4.1 General
...........................................................................................................................................
544.2 Supplementary technical requirements
..........................................................................................
54
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 8
5 Summary of
requirements......................................................................................................................
54
5.1 Technical reference
standards........................................................................................................
54
Sec. 3 Supplementary requirements for well intervention units
............................................. 55
1 General
.....................................................................................................................................................
55
1.1
Introduction....................................................................................................................................
55
2 Requirements for Well Intervention Unit 1
.......................................................................................
55
2.1 General
...........................................................................................................................................
552.2 Supplementary requirements
.........................................................................................................
55
3 Requirements for Well Intervention Unit 2
.......................................................................................
56
3.1 General
...........................................................................................................................................
563.2 Arrangement
..................................................................................................................................
563.3 Area
classification..........................................................................................................................
563.4 Emergency
shutdown.....................................................................................................................
563.5 Escape, evacuation and communication
........................................................................................
563.6 Fire
Protection................................................................................................................................
563.7 Supplementary classification requirements
...................................................................................
56
4 Structural design
.....................................................................................................................................
57
4.1 General
...........................................................................................................................................
57
5 Position
keeping.......................................................................................................................................
57
5.1 General
...........................................................................................................................................
57
Sec. 4 Supplementary requirements for accommodation
units............................................... 58
1 General
.....................................................................................................................................................
58
1.1
Introduction....................................................................................................................................
58
2 Safety principles and
arrangement........................................................................................................
58
2.1 Emergency
shutdown.....................................................................................................................
58
3 Structural
strength..................................................................................................................................
58
3.1 General
...........................................................................................................................................
583.2 Design
loads...................................................................................................................................
583.3 Containerised
modules...................................................................................................................
583.4
Gangways.......................................................................................................................................
58
4 Stability and watertight
integrity...........................................................................................................
59
4.1 General
...........................................................................................................................................
59
5 Electrical systems and
equipment..........................................................................................................
59
5.1 Emergency source of power and emergency installation
..............................................................
59
6 Position
keeping.......................................................................................................................................
59
6.1 General
...........................................................................................................................................
59
Sec. 5 Supplementary requirements for crane units
................................................................
60
1 Introduction
.............................................................................................................................................
60
1.1 Objective
........................................................................................................................................
601.2 Safety principles and arrangements
...............................................................................................
60
2 Structural design
.....................................................................................................................................
60
2.1 General
...........................................................................................................................................
602.2 Technical
requirements..................................................................................................................
60
3 Stability and watertight
integrity...........................................................................................................
60
3.1 Technical
requirements..................................................................................................................
60
4 Certification of materials and
components...........................................................................................
60
4.1 Certification requirements
.............................................................................................................
60
Sec. 6 Supplementary requirements for wind turbine installation
units................................ 61
1 General
.....................................................................................................................................................
61
1.1
Introduction....................................................................................................................................
61
2 General requirements for Wind Turbine Installation Unit
.............................................................
61
2.1 Column stabilised or self-elevating
units.......................................................................................
612.2 Non self-elevating vessel
...............................................................................................................
61
3 Crane
installations...................................................................................................................................
61
3.1 General
...........................................................................................................................................
61
Sec. 7 Optional class
notations....................................................................................................
62
1 Introduction
.............................................................................................................................................
62
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 9
1.1 General
...........................................................................................................................................
621.2 Technical reference
documents......................................................................................................
621.3 General assumptions
......................................................................................................................
62
2 Enhanced
systems....................................................................................................................................
62
2.1 General
...........................................................................................................................................
622.2 Technical
requirements..................................................................................................................
622.3 Certification of materials and components
....................................................................................
62
3 Position mooring system
.........................................................................................................................
63
3.1 General
...........................................................................................................................................
633.2
Application.....................................................................................................................................
633.3 Technical
requirements..................................................................................................................
633.4 Certification of materials and components
....................................................................................
63
4 Dynamic positioning
systems..................................................................................................................
64
4.1 General
...........................................................................................................................................
644.2 Technical
requirements..................................................................................................................
644.3 Certification of materials and components
...................................................................................
64
5 Drilling
plant............................................................................................................................................
65
5.1 General
...........................................................................................................................................
655.2 Technical
requirements..................................................................................................................
655.3 Certification of materials and components
....................................................................................
655.4
DRILL(US)....................................................................................................................................
65
6 Helicopter decks
......................................................................................................................................
66
6.1 General
...........................................................................................................................................
666.2 Technical
requirements..................................................................................................................
666.3 Certification of materials and components
...................................................................................
66
7 Well testing facilities
...............................................................................................................................
66
7.1 General
...........................................................................................................................................
667.2 Technical
requirements..................................................................................................................
677.3 Certification of materials and components
....................................................................................
67
8 Temporary oil storage facilities
.............................................................................................................
67
8.1 General
...........................................................................................................................................
678.2 Technical
requirements..................................................................................................................
688.3 Certification of materials and components
....................................................................................
68
9 Crane installations
..................................................................................................................................
68
9.1 General
...........................................................................................................................................
689.2 Technical
requirements..................................................................................................................
689.3 Certification of materials and components
....................................................................................
68
10 Diving system installations
....................................................................................................................
68
10.1 General
...........................................................................................................................................
6810.2 Technical
requirements..................................................................................................................
6910.3 Certification of materials and components
....................................................................................
69
11 Additional fire protection
......................................................................................................................
69
11.1 General
...........................................................................................................................................
6911.2 Technical
requirements..................................................................................................................
7011.3 Certification of materials and components
....................................................................................
70
12 Loading computer
..................................................................................................................................
70
12.1 General
...........................................................................................................................................
7012.2 Technical
requirements..................................................................................................................
7012.3 Certification of materials and components
....................................................................................
70
13 Periodically unattended machinery
space.............................................................................................
70
13.1 General
...........................................................................................................................................
7013.2 Technical
requirements..................................................................................................................
7013.3 Certification of materials and components
....................................................................................
71
14 Well intervention system
........................................................................................................................
71
14.1 General
...........................................................................................................................................
7114.2 Technical
requirements..................................................................................................................
7114.3 Certification of materials and components
...................................................................................
71
15 Hull monitoring
system...........................................................................................................................
72
15.1 General
...........................................................................................................................................
7215.2 Technical
requirements..................................................................................................................
72
16 Fatigue methodology for ship-shaped units
..........................................................................................
72
16.1 General
...........................................................................................................................................
7216.2 Technical
requirements..................................................................................................................
72
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 10
17 Noise, vibration and comfort rating
notations......................................................................................
72
17.1 General
...........................................................................................................................................
7217.2 Technical
requirements..................................................................................................................
7317.3 Certification requirements
.............................................................................................................
73
18 Cold climate notations
............................................................................................................................
73
18.1 General
...........................................................................................................................................
7318.2 Structural strength
.........................................................................................................................
7318.3
Winterized......................................................................................................................................
75
19 Environmental notations
........................................................................................................................
75
19.1 General
...........................................................................................................................................
7519.2 Objective
........................................................................................................................................
7519.3 Technical
requirements..................................................................................................................
76
20 Enhanced system
verification.................................................................................................................
76
20.1 General
...........................................................................................................................................
7620.2 Technical
requirements..................................................................................................................
7720.3 Certification requirements
.............................................................................................................
77
21 Integrated software dependent systems
................................................................................................
77
21.1 General
...........................................................................................................................................
7721.2 Technical
requirements..................................................................................................................
7721.3 Certification requirements
.............................................................................................................
77
22 Special feature
notations.........................................................................................................................
78
22.1 General
...........................................................................................................................................
7822.2 Special feature notation
NON-SELFPROPELLED....................................................................
7822.3 Tailshaft monitoring
TMON.......................................................................................................
7822.4 Special feature notation BIS
.........................................................................................................
79
23 Summary of reference documents for additional class notations
....................................................... 79
23.1 General
...........................................................................................................................................
79
CH. 3 CLASSIFICATION IN OPERATION
...................................................... 81
Sec. 1 General provisions
...........................................................................................................
81
1 Introduction
.............................................................................................................................................
81
1.1 General
...........................................................................................................................................
811.2 Survey pre-planning and record keeping
.......................................................................................
811.3 Alternative survey arrangements
...................................................................................................
811.4 Surveys performed by approved companies
..................................................................................
81
2 Periodical
surveys....................................................................................................................................
81
2.1 General
...........................................................................................................................................
812.2 Postponement of periodical surveys
..............................................................................................
822.3 Survey of units out of commission
................................................................................................
822.4 Survey Schedules
...........................................................................................................................
82
Sec. 2 General requirements for structure and machinery surveys
....................................... 86
1 General
.....................................................................................................................................................
86
1.1 Preparation for
survey....................................................................................................................
86
2 Hull and
equipment.................................................................................................................................
86
2.1 Conditions for survey and access to structures
..............................................................................
862.2 Survey extent
................................................................................................................................
872.3 Repair of structural damage or deterioration
.................................................................................
88
3 Machinery and systems
..........................................................................................................................
89
3.1 Maintenance and preparation for
survey........................................................................................
893.2 Replacement of machinery components
........................................................................................
893.3 Machinery
verification...................................................................................................................
893.4 Gas turbines
...................................................................................................................................
903.5 Boiler installations
.........................................................................................................................
903.6 Survey of special components
.......................................................................................................
90
4 Special provisions for ageing offshore units
.........................................................................................
91
4.1 General
...........................................................................................................................................
914.2 Corrosion measurements and condition of protective coating
...................................................... 914.3
Fatigue utilization index (FUI)
......................................................................................................
91
Sec. 3 Periodical survey extent for main
class...........................................................................
93
1 General
.....................................................................................................................................................
93
1.1
Introduction....................................................................................................................................
93
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 11
1.2 In-service inspection program (IIP)
...............................................................................................
93
2 Annual survey main class
....................................................................................................................
96
2.1 Survey extent
.................................................................................................................................
962.2 Structure and equipment, general
...............................................................................................
962.3 Structure and equipment, type
specific..........................................................................................
982.4 Machinery and safety systems
......................................................................................................
98
3 Intermediate survey
..............................................................................................................................
100
3.1 General
.........................................................................................................................................
1003.2 Structure and equipment
.............................................................................................................
1003.3 Machinery and safety systems
....................................................................................................
101
4 Renewal survey, structure and equipment
.........................................................................................
101
4.1 General
.........................................................................................................................................
1014.2 All units
.......................................................................................................................................
1024.3 Specific requirements for ship-shaped units
................................................................................
1054.4 Specific requirements for column stabilised units
.......................................................................
1064.5 Specific requirements for self-elevating units
.............................................................................
1084.6 Specific requirements for units of other shape
............................................................................
110
5 Renewal survey, machinery and safety systems
.................................................................................
110
5.1 General
.........................................................................................................................................
1105.2 Machinery
....................................................................................................................................
1105.3 Electrical
installations..................................................................................................................
1115.4 Instrumentation and automation
..................................................................................................
112
Sec. 4 Miscellaneous main class
surveys..................................................................................
113
1 Propeller shaft survey
..........................................................................................................................
113
1.1 General
.........................................................................................................................................
113
2 Propeller connection survey
.................................................................................................................
113
2.1 General
.........................................................................................................................................
1132.2 Tailshaft condition monitoring survey
arrangement....................................................................
114
3 Survey of geared thrusters for main propulsion and
positioning.....................................................
114
3.1
Definitions....................................................................................................................................
1143.2 Survey extent
...............................................................................................................................
114
4 Survey of podded thrusters for main propulsion and
positioning....................................................
114
4.1 General
.........................................................................................................................................
1144.2 Scheduled
surveys........................................................................................................................
114
5 Boiler survey
..........................................................................................................................................
114
5.1 General
.........................................................................................................................................
114
6 Thermal oil heater
survey.....................................................................................................................
115
6.1 General
.........................................................................................................................................
115
7 Gas turbines
survey...............................................................................................................................
115
7.1 Annual survey
..............................................................................................................................
1157.2 Renewal
survey............................................................................................................................
115
8 Survey of the unit's bottom and related
items....................................................................................
116
8.1 Schedule
......................................................................................................................................
1168.2 Survey planning and record keeping
...........................................................................................
1168.3 Ship-shaped Units (ship or barge type
units)...............................................................................
1168.4 Column-stabilised units
...............................................................................................................
1168.5 Self-elevating units
......................................................................................................................
116
9 Survey of towing, temporary and position mooring equipment
....................................................... 116
9.1 Types of
survey............................................................................................................................
1169.2 Annual survey
..............................................................................................................................
1169.3 Intermediate
survey......................................................................................................................
1179.4 Renewal
survey............................................................................................................................
117
Sec. 5 Periodical survey extent for additional service notations
........................................... 120
1 General
...................................................................................................................................................
120
1.1
Introduction..................................................................................................................................
120
2 Drilling units
..........................................................................................................................................
120
2.1
Introduction..................................................................................................................................
1202.2 Annual survey
..............................................................................................................................
1202.3 Complete survey
..........................................................................................................................
120
3 Well intervention
units..........................................................................................................................
121
3.1
Introduction..................................................................................................................................
121
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 12
3.2 Annual survey
..............................................................................................................................
1213.3 Complete survey
..........................................................................................................................
121
4 Accommodation unit
.............................................................................................................................
121
4.1
Introduction..................................................................................................................................
1214.2 Annual survey
..............................................................................................................................
1214.3 Complete survey
..........................................................................................................................
121
5 Crane unit
..............................................................................................................................................
122
5.1
Introduction..................................................................................................................................
1225.2 Annual survey
..............................................................................................................................
1225.3 Complete survey
..........................................................................................................................
122
6 Wind turbine installation vessels
.........................................................................................................
122
6.1
Introduction.................................................................................................................................
1226.2 Annual survey
..............................................................................................................................
1226.3 Complete survey
..........................................................................................................................
122
7 Offshore support vessels
.......................................................................................................................
122
7.1
Introduction.................................................................................................................................
122
Sec. 6 Optional class notation surveys
.....................................................................................
123
1 Introduction
...........................................................................................................................................
123
1.1 General
.........................................................................................................................................
123
2 Position mooring equipment
................................................................................................................
123
2.1
Application...................................................................................................................................
1232.2 Annual survey
..............................................................................................................................
1232.3 Intermediate
survey......................................................................................................................
1232.4 Complete survey
..........................................................................................................................
123
3 Dynamic positioning systems
...............................................................................................................
123
3.1 General
.........................................................................................................................................
1233.2 Specific
requirements...................................................................................................................
1243.3 Annual and complete
survey........................................................................................................
124
4 Drilling
plant..........................................................................................................................................
124
4.1
Application...................................................................................................................................
1244.2 Annual survey
..............................................................................................................................
1244.3 Complete survey
..........................................................................................................................
1274.4 DRILL (US)
................................................................................................................................
133
5 Helicopter
deck......................................................................................................................................
133
5.1
Application...................................................................................................................................
1335.2 Complete survey
..........................................................................................................................
133
6 Well
test..................................................................................................................................................
134
6.1
Application...................................................................................................................................
1346.2 Annual and complete surveys
......................................................................................................
134
7 Temporary oil
storage...........................................................................................................................
134
7.1
Application...................................................................................................................................
1347.2 Annual survey
..............................................................................................................................
1347.3 Complete survey
..........................................................................................................................
134
8 Crane
......................................................................................................................................................
134
8.1
Application...................................................................................................................................
1348.2 Annual and complete surveys
......................................................................................................
135
9 Diving
Systems.......................................................................................................................................
135
9.1
Application...................................................................................................................................
1359.2 Annual, intermediate and complete surveys
................................................................................
135
10 Additional fire protection arrangements
............................................................................................
135
10.1 General
.........................................................................................................................................
13510.2 Complete survey
..........................................................................................................................
135
11 Loading computers for damage control
..............................................................................................
135
11.1
Application...................................................................................................................................
13511.2 Annual survey
..............................................................................................................................
135
12 Periodically unattended machinery space and machinery
centrally operated................................ 135
12.1
Application...................................................................................................................................
13512.2 Annual and complete surveys
......................................................................................................
135
13 Well intervention system
......................................................................................................................
135
13.1
Application...................................................................................................................................
13513.2 Annual survey
..............................................................................................................................
135
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Contents Page 13
13.3 Complete survey
..........................................................................................................................
136
14 Hull monitoring
system.........................................................................................................................
136
14.1
Application...................................................................................................................................
13614.2 General
.........................................................................................................................................
13614.3 Annual survey
..............................................................................................................................
137
15 Fatigue methodology for ship-shaped mobile offshore units
........................................................... 137
15.1
Application...................................................................................................................................
13715.2 General
.........................................................................................................................................
13715.3 Survey
..........................................................................................................................................
137
16 Noise, vibration and comfort rating
....................................................................................................
137
16.1 General
.........................................................................................................................................
137
17 Cold climate notations
..........................................................................................................................
137
17.1
Winterization................................................................................................................................
13717.2 Annual survey
..............................................................................................................................
13717.3 Complete survey
..........................................................................................................................
138
18 Environmental notations
......................................................................................................................
138
18.1 Ballast water management systems
.............................................................................................
13818.2 CLEAN or CLEAN DESIGN
.........................................................................................
13818.3
Recyclable....................................................................................................................................
13818.4 Vapour control systems (VCS)
....................................................................................................
139
19 Integrated software dependent systems
..............................................................................................
139
19.1 General
.........................................................................................................................................
13919.2 Annual survey
..............................................................................................................................
13919.3 Complete survey
..........................................................................................................................
139
20 Special feature
notations.......................................................................................................................
139
20.1 Non self-propelled
units...............................................................................................................
13920.2 Tailshaft
monitoring.....................................................................................................................
139
Sec. 7 Alternative survey arrangements
..................................................................................
141
1 General
...................................................................................................................................................
141
1.1 General
.........................................................................................................................................
141
2 Machinery survey arrangements
.........................................................................................................
145
2.1 General
.........................................................................................................................................
1452.2 Machinery
continuous..................................................................................................................
1452.3 Machinery PMS (planned maintenance
system)..........................................................................
1462.4 PMS RCM (reliability centred maintenance)
..............................................................................
1462.5 Offshore CM (condition
monitoring)...........................................................................................
149
3 Drilling equipment survey arrangements
...........................................................................................
151
3.1 General
.........................................................................................................................................
1513.2 Drilling equipment continuous survey arrangement (DCSA)
..................................................... 1513.3
Drilling equipment PMS RCM
....................................................................................................
1513.4 Drilling equipment condition monitoring survey arrangement
(DCMSA)................................. 151
4 Hull survey arrangements
....................................................................................................................
151
4.1 General
.........................................................................................................................................
1514.2 Structural continuous survey
arrangement...................................................................................
1514.3 Structural integrity management (SIM)
.......................................................................................
152
Sec. 8 Surveys performed by approved companies
................................................................
153
1 Surveys by approved
companies..........................................................................................................
153
1.1 General
.........................................................................................................................................
1531.2 Thickness measurements
.............................................................................................................
1531.3 Bottom survey
afloat...................................................................................................................
1531.4 Non-destructive testing
................................................................................................................
1531.5 Mooring chain
inspections...........................................................................................................
1531.6 Condition
monitoring...................................................................................................................
153
App. A Introduction to offshore classification
.........................................................................
155
App. B Mooring equipment acceptance standard guidance
.................................................... 158
CHANGES HISTORIC
...............................................................................................................
161
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DET NORSKE VERITAS AS
Offshore Service Specification DNV-OSS-101, October 2013
Ch.1 Sec.1 Introduction Page 14
CHAPTER 1 PRINCIPLES AND PROCEDURES FOR CLASSIFICATION
SECTION 1 INTRODUCTION
1 Introduction
1.1 General
1.1.1 This publication presents DNVs Rules for Classification of
Offshore Drilling and Support Units, theterms and procedures for
assigning and maintaining classification, including listing of the
applicable technicalreferences to be applied for
classification.
1.2 Organisation of DNV-OSS-101
1.2.1 DNV-OSS-101 is divided into three main chapters as
follows:
Chapter 1: providing general information about classification
principles and procedures Chapter 2: providing design and
construction requirements for the newbuilding phase Chapter 3:
providing requirements for maintenance of class in the operational
phase.
1.3 Objects covered
1.3.1 DNV-OSS-101 covers classification of mobile offshore units
(units) of the following design types:
ship-shaped units column-stabilised units self-elevating
units
for the following services:
drilling well intervention accommodation heavy-lifting general
offs