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This NORSOK standard is developed with broad petroleum industry
participation by interested parties in the Norwegian petroleum
industry and is owned by the Norwegian petroleum industry
represented by The Norwegian Oil Industry Association (OLF) and The
Federation of Norwegian Industry. Please note that whilst every
effort has been made to ensure the accuracy of this NORSOK
standard, neither OLF nor The Federation of Norwegian Industry or
any of their members will assume liability for any use thereof.
Standards Norway is responsible for the administration and
publication of this NORSOK standard.
Standards Norway Telephone: + 47 67 83 86 00 Strandveien 18,
P.O. Box 242 Fax: + 47 67 83 86 01 N-1326 Lysaker Email:
[email protected] NORWAY Website: www.standard.no/petroleum
Copyrights reserved
NORSOK STANDARD M-650 Edition 4, September 2011
Qualification of manufacturers of special materials
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Foreword 4
Introduction 4
1 Scope 5
2 Normative and informative references 5 2.1 Normative
references 5 2.2 Informative references 5
3 Terms, definitions and abbreviations 5 3.1 Terms and
definitions 5 3.2 Abbreviations 7
4 Responsibilities 8 4.1 Purchasers responsibility 8 4.2
Manufacturers responsibility 8 4.3 Responsibilities of Qualifying
Company 8
5 Qualification of manufacturers 8 5.1 Basis for qualification
of manufacturers 8 5.2 Evaluation for acceptance 8 5.3 Acceptance
of qualification 8 5.4 Proof of acceptance 8
6 Validity of qualification 9 6.1 Term of validity 9 6.2 Renewal
of qualification 9 6.3 Transitional arrangements 9
7 General requirements 9 7.1 Knowledge and relevant experience 9
7.2 Manufacturing facilities and equipment 10 7.3 Sub-contractors
10 7.4 Quality requirements for test laboratories and manufacturers
of welded products 10
8 Manufacturing Summary 10 8.1 Requirements for Manufacturing
Summary 10 8.2 Content of the Manufacturing Summary 10
9 Heat treatment 12 9.1 Heat treatment facilities and equipment
12 9.2 Heat treatment procedure 13 9.3 Verification of heat
treatment procedure 14
10 Qualification of the manufacturing process 15 10.1 Objective
of qualification testing 15 10.2 Essential variables 15 10.3
Qualification testing 17 10.4 Welding procedure qualifications
20
11 Qualification test record (QTR) 20 11.1 General 20 11.2
Content of qualification test record (QTR) 20 11.3 Required copies
and distribution of qualification test record (QTR) 21
Annex A (Informative) Manufacturing Summary front page and
example 22
Annex B (Normative) Additional requirements to API Spec
6A:2010/ISO 10423:2009 , Annex M, and ASTM A 991 27
Annex C (Informative Verification of heat treatment procedure
Example 28
Annex D (Normative) Form for Qualification Test Record (QTR)
Front Page 29
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Foreword The NORSOK standards are developed by the Norwegian
petroleum industry to ensure adequate safety, value adding and cost
effectiveness for petroleum industry developments and operations.
Furthermore, NORSOK standards are, as far as possible, intended to
replace oil company specifications and serve as references in the
authorities regulations. The NORSOK standards are normally based on
recognised international standards, adding the provisions deemed
necessary to fill the broad needs of the Norwegian petroleum
industry. Where relevant, NORSOK standards will be used to provide
the Norwegian industry input to the international standardisation
process. Subject to development and publication of international
standards, the relevant NORSOK standard will be withdrawn. The
NORSOK standards are developed according to the consensus principle
generally applicable for most standards work and according to
established procedures defined in NORSOK A-001. The NORSOK
standards are prepared and published with support by The Norwegian
Oil Industry Association (OLF), The Federation of Norwegian
Industry, Norwegian Shipowners Association and The Petroleum Safety
Authority Norway. NORSOK standards are administered and published
by Standards Norway.
Introduction This edition replaces NORSOK M-650, Rev. 3. The
main changes in Edition 4 are related to the following items: x
clarification of scope; x definitions included or changed for
Company, equalization time, heat sink, holding time, main
contractor,
manufacturer, Qualifying Company, soak time and test directions;
x clarification of responsibilities; x clarification of
transitional arrangements between Revision 3 and Edition 4 of this
NORSOK standard; x more stringent requirements to manufacturers
knowledge; x requirements to test laboratories and manufacturers of
welded products included; x type of etchants to be used and
preparation of samples for micro examination, as applicable, shall
be
stated in the Manufacturing Summary; x new clause about heat
treatment with requirements to equipment, heat treatment procedure
and
verification of heat treatment procedure; x changes in essential
variables of the qualification tests especially regarding
manufacturing equipment,
heat treatment, hipped products and start material; x changes in
test requirements for flanges, other type of forgings, plates,
rolled bars and valves machined
from forgings; x changes in extent and requirements to
additional testing at mid-thickness for bars, forgings and
hipped
(HIP) products; x otherwise editorial changes for
clarification.
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1 Scope This NORSOK standard establishes a set of qualification
requirements to verify that the manufacturer has sufficient
competence and experience of the relevant material grades, and
necessary facilities and equipment to manufacture these in the
required shapes and sizes with acceptable properties. This standard
is applicable to the following material grades and product forms:
a) Duplex SS: all grades, product forms and dimensions b) High
alloyed austenitic SS: all grades, product forms and dimensions c)
Nickel base alloys: castings d) Titanium and its alloys: castings
This NORSOK standard is also applicable to critical components or
product forms in other materials and for special
manufacturing/fabrication processes, e.g. titanium and nickel
alloys in other product forms than casting, carbon steel and low
alloy steel products and induction/cold bending.
2 Normative and informative references The following standards
include provisions and guidelines which, through reference in this
text, constitute provisions and guidelines of this NORSOK standard.
Latest issue of the references shall be used unless otherwise
agreed. Other recognized standards may be used provided it can be
shown that they meet the requirements of the referenced
standards.
2.1 Normative references API Spec 6A:2010/ ISO 10423:2009,
Specification for Wellhead and Christmas Tree Equipment/Petroleum
and natural
gas industries Drilling and production equipment Wellhead and
christmas tree equipment
ASTM A370-11, Standard Test Methods and Definitions for
Mechanical Testing of Steel Products ASTM A 703, Steel Castings,
General Requirements, for Pressure-Containing Parts ASTM A 991,
Conducting Temperature Uniformity Surveys of Furnaces Used to Heat
Treat Steel Products EN 10204, Metallic products Types of
Inspection Documents ISO 3834-2, Quality Requirements for Fusion
Welding of Metallic Materials Part 2: Comprehensive quality
requirements ISO 9001, Quality Management Systems Requirements
ISO/IEC 17025, General requirements for the competence of testing
and calibration laboratories NORSOK M-630, Material Data Sheet for
Piping PED 97/23/EC, Pressure Equipment Directive
2.2 Informative references API 6HT, Heat Treatment and Testing
of Large Cross Section and Critical Section
Components ASTM E407, Standard Practice for Microetching Metals
and Alloys
3 Terms, definitions and abbreviations For the purposes of this
NORSOK standard, the following terms, definitions and abbreviations
apply.
3.1 Terms and definitions 3.1.1 can verbal form used for
statements of possibility and capability, whether material,
physical or casual 3.1.2 company owner or organization that is
responsible for development of and/or operation of an
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NOTE For the purpose of this standard this is normally an oil
company. 3.1.3 equalization time the time used to ensure a uniform
pre-set temperature throughout a heat treatment load and/or
throughout all section thicknesses of a component (see also figure
in Annex C) 3.1.4 heat sink separate block of material made from
the same generic type of material as the parts being heat treated
to monitor temperature during heat treatment 3.1.5 high alloyed
austenitic SS austenitic SS with PREN 40 or Ni + 2 x Mo > 30 (Mo
> 2) EXAMPLES SS type 6Mo, UNS S31266, UNS S32654, UNS S34565,
UNS J95370. 3.1.6 holding time time from the controlling
thermocouple (normally furnace thermocouple) has reached set
temperature until the specified soaking time is completed. NOTE
Holding time consist of equalization time + soaking time. (see also
figure in Annex C). 3.1.7 main contractor party, which carry out
all or part of the design, engineering, procurement, construction,
commissioning or management of a project, or operation or
maintenance of a facility on a contract awarded by Company 3.1.8
manufacturer party, including sub-contractors, which carry out
operations affecting the material properties of the finished
product NOTE These operations can include forming, heat treatment,
etc. 3.1.9 may verbal form used to indicate a course of action
permissible within the limits of this NORSOK standard 3.1.10
pitting resistance equivalent PREN PREN = %Cr + 3.3 x %Mo + 16 x %N
3.1.11 purchaser party that purchase a product from a manufacturer
3.1.12 Qualifying Company party which monitor the qualification
exercise and in the end accept the resulting qualification test
record (QTR) by signing and stamping the QTR front page The
Qualifying Company can be the Company, the main contractor, the
purchaser or a party authorised to act on their behalf. Qualifying
Company shall be independent of the manufacturer. 3.1.13 shall
verbal form used to indicate requirements strictly to be followed
in order to conform to this NORSOK standard and from which no
deviation is permitted, unless accepted by all involved parties
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3.1.14 should verbal form used to indicate that among several
possibilities one is recommended as particularly suitable, without
mentioning or excluding others, or that a certain course of action
is preferred but not necessarily required 3.1.15 soaking time time
that the entire part being heat treated (throughout its cross
sections) remains at the specified set temperature 3.1.16 type 22Cr
duplex ferritic/austenitic stainless steel alloys with 22 % Cr
EXAMPLES UNS S31803 and UNS S32205. 3.1.17 type 25Cr duplex
ferritic/austenitic stainless steel alloys with 25 % Cr and PREN 40
NOTE Often referred to as super duplex. EXAMPLES UNS S S32505, UNS
S32550, UNS S32750, UNS S32760 and UNS S39274. 3.1.18 type 6Mo
austenitic stainless steel alloys with 6 % Mo and PREN 40 EXAMPLES
UNS S31254, UNS N08367 and UNS N08926. 3.1.19 test directions test
directions are defined relative to the geometry of the component to
be tested For the purpose of this NORSOK standard the definitions
in ASTM A370-11, sect. 4, apply with axial defined as the
longitudinal axis of test specimen located parallel to the main
axis of the component.
3.2 Abbreviations API American Petroleum Institute ASTM American
Society for Testing and Materials CD compact disc EN European
Standard HIP hot isostatic pressed IEC International
Electrotechnical Commission ISO International Organization for
Standardization MDS material data sheet MOM minutes of meeting NDE
non-destructive examination PREN pitting resistance equivalent PWHT
post weld heat treatment QTR qualification test record SS stainless
steel UNS unified numbering system WPQR welding procedure
qualification record WPS welding procedure specification
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4 Responsibilities
4.1 Purchasers responsibility The purchaser is responsible for
ensuring that the manufacturers engaged are qualified within the
essential variables of this NORSOK standard. Acceptance of a
manufacturer is at the discretion and determination of the
purchaser.
4.2 Manufacturers responsibility The manufacturer is responsible
for establishing and maintaining required documentation and carry
out verifications and testing in accordance with this NORSOK
standard. A manufacturer acquiring a "NORSOK M-650 qualification"
assumes an obligation to carry out manufacturing in accordance with
the qualified Manufacturing Summary including its referred
procedures. If an order requiring "NORSOK M-650 qualification" is
outside the qualified range, as defined in 10.2, the purchaser
shall be informed.
4.3 Responsibilities of Qualifying Company The qualification
exercise itself shall be carried out in co-operation with and
verified by a Qualifying Company. The Qualifying Company shall
monitor the qualification exercise, review and in the end accept
the resulting qualification test record (QTR) and as proof of the
acceptance sign and stamp the QTR front page. It is important for
acceptance of the QTR by other customers that the verification
exercise is carried out by a recognized Qualifying Company.
5 Qualification of manufacturers
5.1 Basis for qualification of manufacturers Basis for
qualification of manufacturers including their nominated
sub-contractors shall be as follows: a) knowledge and relevant
manufacturing experience with the type of material to be qualified
(see Clause 7); b) acceptable manufacturing facilities and
equipment (see Clause 7 and Clause 9); c) established Manufacturing
Summary (procedure) covering all manufacturing steps from melting
or semi
product to finished products (see Clause 8); d) an established
heat treatment procedure (see Clause 9); e) manufacturers quality
system, which shall fulfil the requirements of ISO 9001; f) results
of testing in compliance with this NORSOK standard (see Clause
10).
5.2 Evaluation for acceptance The Qualifying Company shall carry
out a review of the manufacturers facilities, equipment,
implementation of procedures and documentation as required by this
NORSOK standard at the manufacturers and sub-suppliers premises.
The evaluation for acceptance shall concentrate on facilities and
equipment for melting, refining, forming, welding, heat treatment,
etc. The review shall be carried out by technical competent
personnel, with knowledge of metallurgical aspects of the
applicable alloys, including precipitation diagrams, effect of hot
forming, welding, heat treatment, etc., and who has experience
relevant for the manufacturing process to be evaluated. The result
of the evaluation shall be documented in an evaluation report or a
MOM.
5.3 Acceptance of qualification A complete QTR with content in
compliance with Clause 11 shall be established for possible
acceptance.
5.4 Proof of acceptance The original signed and filled in QTR
front page is the only valid proof of being accepted according to
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NOTE There is no official listing in the name of NORSOK of
accepted manufacturers according to this NORSOK standard.
6 Validity of qualification
6.1 Term of validity The validity of a qualification is 5 years
from the date of acceptance (signing) of the QTR front page. The
qualification is valid within the parameters specified in 10.2.
6.2 Renewal of qualification Renewal of the qualification shall
be carried out as follows: a) a manufacturer with regular
production of the originally qualified products and alloys is
considered re-
qualified and additional testing is normally not required. It is
a pre-requisite that all test requirements in the current revision
of this NORSOK standard are complied with;
b) evaluation and review at the manufacturers and sub-suppliers
premises according to 5.2 shall be carried out by the Qualifying
Company;
c) the Manufacturing Summary and referred procedures shall be
reviewed, updated and a decision made whether retesting is
required;
d) the heat treatment procedure and its corresponding
verification, see 9.3, shall be reviewed, and a decision made
whether a new verification is required;
e) a minutes of meeting (MOM) listing actual parts of the QTR
which shall be updated and with conclusions for renewal of the
qualification shall be included in the re-qualified QTR;
f) a new QTR front page shall be established and properly
signed.
6.3 Transitional arrangements Subject to purchasers acceptance,
Revision 3 qualifications are considered to fulfil the Edition 4
requirements of this NORSOK standard until the validity of the
Revision 3 qualification expires on the conditions stated below.
There are no transitional arrangements for flanges or valves
machined from forgings. For these products it is presupposed that
the qualification shall be in accordance with Edition 4 of this
NORSOK standard. Transitional conditions are as follows: a) the
Manufacturing Summary, see 8.2, is updated, and a heat treatment
procedure, see 9.2, is
established/updated; b) verification of the heat treatment
procedure, as specified in 9.3, has been carried out; c) the
additional test requirements in 10.3.3, as specified for selected
product forms in Table 2, are fulfilled. In such case a statement
shall be included in the box Other information on the original
Revision 3 QTR front page and signed off by the Qualifying Company.
The original Revision 3 validity date shall be maintained.
7 General requirements
7.1 Knowledge and relevant experience
7.1.1 Knowledge The manufacturer shall have in-house knowledge
of relevant metallurgical aspects of the applicable alloys
including precipitation diagrams, effects of hot forming, welding,
and heat treatment parameters, etc. as applicable for his
manufacturing process.
7.1.2 Relevant experience The manufacturer shall have relevant
experience with manufacture of the type of material to be
qualified. Relevant experience should be supported by statistical
data presented in the form of a histogram for key parameters, e.g.
tensile strength, impact thoughness, corrosion resistance, etc. In
addition a relevant reference list from the last 2 years production
for the products, materials and the range of sizes to be qualified
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New manufacturers with less than 2 years of documented
production for actual product and material may be qualified to this
NORSOK standard, but with a validity period limited to 2 years,
after which a new evaluation shall be carried out. A note to this
effect shall be included on the QTR front page.
7.2 Manufacturing facilities and equipment Facilities and
equipment shall be fit for purpose, regularly maintained and
calibrated as required. Requirements for heat treatment facilities
and equipment are further described in 9.1.
7.3 Sub-contractors If parts of the production are carried out
by a sub-contractor, the manufacturer is responsible for ensuring
that the sub-contractor meets the requirements of this NORSOK
standard for the manufacturing steps that the sub-contractor is
performing.
7.4 Quality requirements for test laboratories and manufacturers
of welded products
7.4.1 Test laboratories
Test laboratories shall have a quality system in accordance with
the principles in ISO/IEC 17025 or equivalent. The laboratories
should hold a national accreditation.
7.4.2 Manufacturers of welded products Manufacturers of welded
products shall comply with the principles specified in ISO
3834-2.
8 Manufacturing Summary
8.1 Requirements for Manufacturing Summary The manufacturer
shall have a Manufacturing Summary for each production route, type
of product, grade of material and size range. NOTE Sometimes it can
be convenient to combine several production routes, type of
products and/or grade of materials into one Manufacturing Summary,
e.g. as shown in the flow chart in Annex A. The Manufacturing
Summary shall describe, step by step in a logical and correct
sequence, all important manufacturing activities with reference to
detailed procedures. A short description and the main parameters
for each activity shall be included. Each production route shall be
illustrated with a flow chart. If the manufacturer has different
plants or different production routes for a product, separate
documentation is required for each of these. If essential parts of
the work (e.g. forming, heat treatment, pickling, etc.) are
subcontracted, this shall be identified in the documentation. The
documentation shall then include the name and address of each
subcontractor and the relevant documentation from the
subcontractors equipment and procedures. The Manufacturing Summary
is the property of the manufacturer. Distribution is at the
manufacturer's discretion.
8.2 Content of the Manufacturing Summary
8.2.1 Scope The scope of the Manufacturing Summary shall be
clearly defined by stating a) name and address of manufacturer, b)
grade of material (UNS number) with reference to standard and MDS,
c) type and size range of products for which the Manufacturing
Summary applies, d) identification of the manufacturing
process.
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8.2.2 Content
8.2.2.1 General The Manufacturing Summary shall include, but not
be limited to, the requirements in 8.2.2.2 to 8.2.2.15.
8.2.2.2 The product type and the manufacturers requirements
(purchasing specification) regarding start material. Apply
especially when semi finished products such as ingot, bar, pipe,
plate, strip, etc., are used as a basis for the manufacture. In
such cases the manufacturer of the start material shall also be
given.
8.2.2.3 Manufacturers inspection of start material on
reception.
8.2.2.4 Melting shop including a) melting and refining
processes, b) casting method, e.g. ingot, continuous cast, etc.
8.2.2.5 Foundry including a) melting and refining processes, b)
handling of and maximum percentage of eventual return scrap, c)
casting process, e.g. investment, centrifugal, sand castings, etc.,
d) moulding method, type of sand, binding agent and method of
casting.
8.2.2.6 Hot forming including a) all hot forming processes such
as forging, pressing and rolling with information about size and
thickness
range of each hot forming process, b) maximum and minimum hot
forming temperatures and how these temperatures are controlled, c)
possible reheating cycles, d) method of cooling after completion of
the hot forming process, e) minimum forging ratio including how the
forging ratio is calculated, f) sketch illustrating each step in
the forming process, see Annex A.
8.2.2.7 Heat treatment including a) description of heat
treatment cycle, e.g. loading temperature, heating rate, set
temperature with tolerances
and holding- and soaking times. For continuous and semi
continuous furnaces according to 9.2.4, b) cooling details, e.g.
cooling medium (water, air or combination thereof, etc.), type of
cooling (quenching,
spraying, etc.), relevant parameters (temperatures of quenching
bath, for spraying medium velocity, type and size of nozzles,
etc.),
c) reference to the specific heat treatment procedure according
to 9.2.
8.2.2.8 Blasting/cleaning equipment, including the type of
grit.
8.2.2.9 Pickling.
8.2.2.10 Welding (including weld repair). The WPS and PQR
applicable for the qualification shall be listed.
8.2.2.11 PWHT (if applicable).
8.2.2.12 Type of NDE and inspection methods.
8.2.2.13 Production testing including a) type of tests to be
carried out, b) test sampling, which shall be identified as a
separate activity and described in the correct sequence in the
Manufacture Summary, c) sketches showing typical samples with
dimensions for production tests with location and orientation of
test
specimens, d) procedure for preparation of specimens, etching
and examination of microstructure including types of
etchants used preferably with reference to one of the etchants
listed in ASTM E407.
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For duplex steels in particular more than one etchants may be
required for detecting intermetallic phases, carbides and
nitrides.
8.2.2.14 Description of the material traceability system.
8.2.2.15 A list of applicable procedures. An excerpt from a
typical Manufacturing Summary is included in Annex A as an
example.
9 Heat treatment
9.1 Heat treatment facilities and equipment
9.1.1 General Heat treatment facilities and equipment shall
fulfil the requirements in 9.1.2 to 9.1.8. In addition, API 6HT
should be used as a guideline.
9.1.2 Foundries Foundries shall have heat treatment facilities
within their own premises or they shall be located in their close
vicinity.
9.1.3 Heat treatment furnaces Heat treatment furnaces shall be
adequately dimensioned for the loads to be heat treated. Electrical
furnaces shall have mechanical means of circulating the air during
heating. The only exception is cases where it can be documented
through verifications (see 9.3) that uniform heating is achieved
without forced circulation. Furnaces shall be equipped with
automatic temperature indicating, controlling and recording
devices, which shall possess an accuracy of 1 % of their full scale
range. A temperature uniformity survey of the quality heat
treatment furnaces shall be carried out annually in accordance with
API Spec 6A:2010/ISO:2009, Annex M, ASTM A 991 or equivalent and
additional requirements given in Annex B. The initially temperature
uniformity survey shall be carried out with maximum load in the
furnace. Subsequent temperature uniformity surveys may be carried
out with empty furnace.
9.1.4 Thermocouples Thermocouples shall be calibrated and fulfil
the requirements of API 6A (Twentieth Edition)/ISO 10423:2009,
Annex M.
9.1.5 Quenching baths Quenching baths shall have dimensions and
cooling facilities adequate to keep the water temperature below 50
C at any time during the quenching operation. The quench tank shall
be equipped with pumps or propellers to ensure satisfactory
circulation and agitation during quenching. Quenching facilities
should include provisions for internal cooling for the quenching of
products with penetrating bores such as pipes. The quenching bath
shall be equipped with continuous temperature monitoring/recording
devices.
9.1.6 Loading of components Pallets or other fixtures shall be
used for placing parts during heat treatment and quenching to
ensure free circulation of air and water between each component.
Parts shall not be placed directly onto the furnace floor. Piling
of components in baskets is not allowed.
9.1.7 Transfer time between furnace and quenching bath The
equipment shall be capable of transferring materials from heat
treatment furnace into quenching bath within a maximum of 60 s for
alloys requiring water quenching. Pr
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For large components it is recognised that a transfer time of 60
s may be difficult to achieve. In such cases a longer transfer time
may be specifically qualified. Qualification tests shall comprise
both thin and heavy sections of such components as agreed with the
Qualifying Company. Details of the extended transfer time including
for, which products it is applicable for, shall be highlighted on
the QTR front page. The transfer time is measured from the time the
furnace door is fully open or the furnace roof is fully removed and
until the component(s) is completely submerged into the quenching
bath.
9.1.8 Continuous furnaces and induction furnaces Continuous
furnaces and induction furnaces shall generally fulfil the
principles stated above. A specific evaluation shall be made in
each case.
9.2 Heat treatment procedure
9.2.1 General A specific heat treatment procedure shall be
established. Content of the procedure shall as a minimum be as
given in 9.2.2 to 9.2.6.
9.2.2 Description of heat treatment facilities and equipment The
following information shall be included: a) type and identification
of furnace(s); b) sketch of furnace showing, overall dimensions,
working zone and location of burners as applicable; c) location and
identification of pyrometers and/or thermocouples in the furnace
for control and recording
respectively. For continuous furnaces the heating zone and the
working zone shall be clearly defined; d) maximum operating
temperature of furnace(s); e) description of how temperature is
controlled; f) cooling facilities; g) sketch of heat treatment
facilities showing furnace(s) and quenching bath relative to each
other.
9.2.3 Loading and unloading of components and transfer between
furnace and quenching bath The following information shall be
included: a) stacking of components in furnace and during quenching
(sketch to be prepared); b) method(s) for unloading of components
from furnace. If several pallets/components are heated in the
furnace at the same time the unloading of these should be
especially addressed; c) maximum transfer time of components from
open furnace door until components are completely
submerged in quenching bath.
9.2.4 Description of heat treatment cycle The following
information shall be included: a) loading temperature, heating
rate, set temperature with tolerances and holding- and soaking
time; NOTE For definition of holding- and soaking time see figure
in Annex C, 3.1.6 and 3.1.15. b) cooling details, e.g. cooling
medium (water, air, gas or a combination thereof, etc.), type of
cooling
(quenching, spraying, etc.), relevant parameters (temperatures
of quenching bath, for spraying medium velocity, type and size of
nozzles, etc.);
c) for continuous and semi continuous furnaces: travel speed and
minimum soaking time as function of size (e.g. thickness, diameter,
cross section, etc.) of products to be heat-treated and other
relevant parameters.
9.2.5 Production testing and traceability The following
information shall be included: a) principles for selection of
components to be used for production testing within each heat
treatment load.
(sketch to be prepared) taking into account that selection
should be from the center close to the bottom of a heat treatment
load;
b) description of Prov
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1) how traceability of heat and heat treatment lot is ensured
throughout the whole heat treatment process, 2) how components
within each heat treatment load are identified, 3) how components
used for production testing in each heat treatment load are
identified.
9.2.6 Documentation of heat treatments A description of the
following shall be included: a) how the temperature cycle is
recorded and documented; b) follow up and documentation of maximum
temperature of quenching bath during quenching; c) how
documentation of the heat treatment loads is carried out [via
photographs (preferred) or loading map]; d) actual location of
components used for production testing in each heat treatment
load.
9.3 Verification of heat treatment procedure
9.3.1 General Verification is required of procedures for heat
treatment except for stress relieving heat treatment in accordance
with this NORSOK standard.
9.3.2 Objective The objective of the verification is to ensure
that the specified parameters in the established heat treatment
procedure are correct by comparing the readings of the furnace
controlling thermocouple and the contact thermocouples fixed onto
the load/components. The verification shall especially verify that
a) all components in a heat treatment load reach the specified set
temperature throughout their thickness, b) the soaking time is not
started before the load/components have actually reached the
minimum heat
treatment temperature specified in the procedure. For guidance
see API 6HT (first edition), sect. 6.3.1.6.
9.3.3 Extent of verification The verification shall be carried
out for each furnace used for quality heat treatment using the
heaviest load and/or most dense packed load to be heat treated.
Manufacturers or heat treatment contractors having several heat
treatment procedures shall verify the most extreme conditions (e.g.
a combination of shortest soaking time, shortest heating time,
highest set temperature) in their procedures to minimise the number
of verifications required. After a major re-furbishment of a
furnace or after a furnace modification changing the heating
parameters, a new verification shall be carried out.
9.3.4 Procedure for the verification The verification shall be
carried out as follows: a) contact thermocouples shall be fixed
onto the surface of at least three components which are
respectively
located in the middle of the heat treatment load and in two
corners of the load diametrically opposite to each other;
b) for heavier components holes shall be drilled into the
components down to mid-thickness and the thermocouples placed into
the holes. The holes should be at least 100 mm from the second
surface of the component. To avoid damaging the components heat
sinks may be used, which shall be made from the same general type
of material as the parts being heat treated. The cross section of
the heat sink shall be equal to that of the heaviest cross section
of the parts being heat treated and the dimensions such as to allow
for location of the drilled hole as specified above. The number and
location of the heat sinks shall be as specified in a) above;
The definition of heavier component varies with the type of
component (e.g. plate, pipe, fitting, forging, casting, etc.) of
the component and shall be agreed in each case also taking into
consideration the proposed soaking time in the heat treatment
procedure for the component. c) readings from the contact
thermocouples shall be compared with the readings from the
controlling
thermocouple of the furnace by superimposing the time
temperature curves from the contact thermocouples onto the curve
from the controlling thermocouple of the furnace. Pr
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See the example in Annex C; d) the manufacturer shall establish
a procedure describing how the verification is proposed to be
carried out
including how the mid-thickness temperature will be checked. The
procedure shall be accepted by the Qualifying Company prior to
start of the verification.
9.3.5 Reporting A report shall be established identifying the
furnace verified, describing the heat treatment load used and
location of thermocouples within the load (photograph). The
superimposed time temperature curves from the contact thermocouples
and the controlling thermocouple(s) of the furnace shall be
included in the report.
9.3.6 Witnessing The verification of the heat treatment
procedure shall be witnessed by the Qualifying Company, who also
shall sign the final report onto completion of the verification
exercise.
10 Qualification of the manufacturing process
10.1 Objective of qualification testing The manufacturing
process as described in the Manufacturing Summary shall be
qualified by testing of actual products in order to a) demonstrate
that the proposed manufacturing route and production parameters
result in products meeting
the specified requirements, b) verify that the proposed
production test sampling gives results, which are representative of
the properties
of the actual components they represent.
10.2 Essential variables
10.2.1 General A change in one or more of the manufacturing
parameters stated in 10.2.2 to 10.2.13 requires re-qualification of
the manufacturing process.
10.2.2 Thickness limitations and weight The maximum qualified
weight and thickness shall be according to limits given in Table 1,
but shall in no case exceed the limits specified in the
Manufacturing Summary.
Table 1 - Qualified maximum thickness and weight for applicable
products
Type of product Type of material Tested thickness
(T)
mm
Qualified thickness
mm
Weight of tested
component (G) kg
Qualified weight
Strip, plate, pipe, tube and wrought fittings
High alloyed austenitic SS + SS type 25Cr duplex
T d 40 T + 25 %, maximum 40
N/A N/A
T > 40 T SS type 22Cr
duplex T d 60 T + 25 %,
maximum 60 N/A N/A
T > 60 T Castings, forgings, bars and HIP
High alloyed austenitic SS, Ni-alloys + SS type 25Cr duplex
T d 60 T + 10 %, maximum 60
G d 250 G + 100 %
T > 60 T G > 250 All SS type 22Cr
duplex T d 120 T + 10 %,
maximum 120 G d 250 G + 100 %
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Type of product Type of material Tested thickness
(T)
mm
Qualified thickness
mm
Weight of tested
component (G) kg
Qualified weight
T > 120 T G > 250 All Titanium T T + 25 % G d 150 G + 100
% G > 150 All Investment castings
All T T + 25%, maximum 60 mm. Above 60 mm as for Castings.
N/A N/A
10.2.3 Material grade A change from one material grade to
another, e.g. change from one UNS No. to another UNS No.
10.2.4 Melting and refining equipment A change in the final
melting/refining process.
10.2.5 Manufacturers of start materials A change of manufacturer
of start material. The start material is defined as ingots,
billets, blooms, plates, pipes, etc. used to manufacture a final
product as flanges, fittings, valve bodies, etc. This requirement
may be disregarded if a) the manufacturer of start material holds a
valid NORSOK M-650 qualification for the specific start material,
b) it can be documented that the specific start material from a
manufacturer already has been used in other qualifications for the
same grade of material.
10.2.6 Manufacture at different plants and/or locations If
production is carried out at different plants/locations, a separate
qualification is required for each plant. This applies also for a
change of sub-contractors for essential operations such as heat
treatment, HIPing, etc.
10.2.7 Manufacturing equipment A change in manufacturing
equipment, as described in the Manufacturing Summary, that can
negatively influence the product properties. This applies also if
the manufacturer has several alternative manufacturing routes for a
product.
10.2.8 Castings Change of moulding method typically between a)
sand moulding (sand castings), b) ceramic moulding (investment
castings, e.g. lost wax-, unicast-, shaw method, etc.), c) graphite
moulding (titanium castings only), d) change of casting technique
between static casting, centrifugal casting, or vacuum casting.
This is not
applicable for titanium castings, which shall always be cast in
vacuum, e) change of HIPing parameters (significant changes in
temperature, pressure, time, vacuum ) or HIP
equipment (titanium castings only).
10.2.9 Forgings Change of the following: a) open die and ring
rolled product forms;
Separate qualifications shall be carried out for flanges, bars,
rings, discs, etc.
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b) closed die forgings. Components for testing shall have a
section thickness in the upper thickness range specified by the
Manufacturing Summary.
10.2.10 Hot isostatic pressed (HIP) products Change of a) the
manufacturer of powder for HIP, b) HIP parameters (significant
changes in temperature, pressure, time, vacuum) or HIP
equipment.
10.2.11 Hot forming A change from one forming method to another
and a change of forging temperature outside the established and
qualified tolerances. Typical examples are a) from rolling to
forging or vice versa, b) from die forging to open die forging or
vice versa, c) from hammer forging to press forging or vice versa,
d) from hot pressing to extruding or vice versa, e) from hot to
cold forming/rolling or vice versa, f) change of cooling method
after hot forming from water quenching to any other cooling
method.
10.2.12 Welded products For manufacture of welded pipe and
fittings a change of WPS does not require re-qualification,
provided the requirements of NORSOK M-630 are fulfilled, except
from the following: a) changes from double sided to single sided
welds; b) change in welding method or combination of welding
methods.
10.2.13 Heat treatment The following apply: a) change of heat
treatment temperature outside the allowable range. The allowable
range of heat treatment
temperature shall be within 10 qC to +30 qC from the temperature
used for the qualification testing of the component;
b) change of heat treatment cycle, e.g. from a one step to a two
step cycle or vice versa; c) reduction of holding and/or soak time
to a time shorter than that established during the verification of
the
heat treatment procedure; d) change from furnace heat treatment
to induction heat treatment or vice versa; e) change from batch
furnace heat treatment to continuous furnace heat treatment or vice
versa; f) for hot finished seamless pipes only: change from furnace
heat treatment to direct quench from hot finish
operation or vice versa; g) change in quench medium from water
to polymer, oil, nitrogen, air and similar or vice versa; h) change
in quenching method from quenching in bath to spray quenching or
vice versa.
Change or re-furbishment of the heat treatment furnace within
the same premises does not require re-qualification provided the
requirements in Clause 9 are fulfilled.
10.3 Qualification testing
10.3.1 Selection of components for testing The selection of
components for testing and test sampling shall be as agreed with
Qualifying Company. Components for testing should have a section
thickness in the upper thickness range specified by the
Manufacturing Summary. Except for castings and open die forgings
the components shall be representative in geometry of what actually
shall be manufactured. Castings and open die forgings selected for
testing shall be actual products, i.e. not test blocks. For
castings qualification should be carried out on a cored component,
e.g. valve body. For forged flanges, contour forged valves and
similar products where production testing is planned to be carried
out on an integral prolongation such a prolongation shall be
integrated in the qualification test forging. Pr
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Components for testing shall be from regular production or from
test production manufactured according to the normal manufacturing
route and with regular production equipment.
10.3.2 Testing
10.3.2.1 Certification of test sampling and test results All
extraction of test samples and testing specifically related to the
qualification tests shall be certified in accordance with EN 10204,
Type 3.2.
10.3.2.2 Extent of testing for qualification Testing for
qualification shall as a minimum comprise a) production testing
with test sampling as specified in NORSOK M-630: MDSs, other
applicable standard
and/or the Manufacturing Summary, b) additional testing for
qualification according to Table 2, c) for forged flanges, contour
forged valves and similar products with integral prolongations
testing shall be
carried out on both the prolongation and the product itself. d)
non-destructive testing as specified in NORSOK M-630 and relevant
MDSs and/or other relevant material
specifications. The type of tests to be performed and minimum
requirements shall be as specified in NORSOK M-630 and relevant MDS
(or material standard/specification if materials are not covered by
a MDS).
10.3.2.3 Requirements for materials requiring impact testing For
materials requiring impact testing, the requirement for base
material shall be 20 J higher than the production test
requirements. This does not apply to the additional testing
specified in 10.3.3 or to the testing in position 2 for flanges.
NOTE For qualification of dimensions outside the range specified by
the respective MDSs special acceptance requirements may be agreed,
e.g. exception to the requirement for the impact test results to be
20 J higher during qualification than the production test
requirements. In such cases this shall be clearly stated onto the
QTR front page.
10.3.2.4 Acceptance of production testing from integral
prolongations from forged products To accept production testing to
be taken from the prolongation the test results from the
prolongation shall be representative of the properties obtained
from the same position of the sacrificial product, e.g. position 1
(TH /2) for flanges. It is at the discretion of the Qualifying
Company to decide what is representative, i.e. an acceptable
difference between results from tests located in the prolongation
and in the product itself.
Table 2 Testing required for qualification
Type of product Sample for
production test Additional tests for qualification
All products Test sampling as specified in the MDS and/or the
Manufacturing Summary.
Type, number and location of tests as specified in the MDS and
material specification unless otherwise specified in this
table.
A sketch shall be prepared with dimensions of production test
samples and tested components tested for qualification. The
location and orientation of test specimens shall be shown. The
components used for qualification should in addition be documented
with photographs.
Castings Integral or gated test blocks. Production test blocks
shall be tested as part of the qualification testing.
Tests from thin and thick sections of a sacrificial casting.
Dished heads From over-length of the component.
Tests shall be carried out from the over-length and from the
deformed area of the component. For dished heads made of Pr
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Type of product Sample for production test
Additional tests for qualification
plates and welded together prior to forming the tests shall
include a weld.
Flanges all manufacturing methods
Sacrificial flange or an integral prolongation.
Qualification testing shall encompass testing of a sacrificial
flange in both the flange neck and flange ring, position 1 (TH /2)
and position 2 (TB/2) respectively, as shown in the respective
MDSs. In position 1 impact testing shall be taken in both axial and
tangential direction. The minimum absorbed energy for impact tests
in Pos. 1, tangential direction, shall be minimum 27 J/20 J
(average/single values) tested at -46 C.
Forgings closed die. Sacrificial forgings.
Additional testing according to 10.3.3 shall be carried out if
section thickness exceeds 50 mm for all materials requiring impact-
or corrosion testing according to MDS/ applicable specifications.
Other additional testing may be required depending on shape and
functionality of the forging as agreed with purchaser and
Qualifying Company.
Forgings - open die Tests from prolongation on actual forging or
from sacrifical forging.
Additional testing according to 10.3.3 shall be carried out if
section thickness exceeds 50 mm for all materials requiring impact-
or corrosion testing according to MDS/applicable specifications.
Other additional testing may be required depending on shape and
functionality of the forging as agreed with purchaser and
Qualifying Company.
HIP components except flanges
Integral test blocks. Testing shall be made from thin and thick
sections of a sacrificial product. Except for the additional
testing test results shall fulfil the requirements in the
respective MDSs . Additional testing according to 10.3.3 shall be
carried out if section thickness exceeds 50 mm for all materials
requiring impact- or corrosion testing according to MDS/applicable
specifications.
Plates
Cut from plate. Both ends on one plate shall be tested with
three sets of tests at each end located in the middle and at each
edge. Test specimens shall be located in the mid-thickness.
Ring rolled products Tests from prolongation on actual forging
or separate forged test ring.
Additional testing according to 10.3.3 shall be carried out if
section thickness exceeds 50 mm for all materials requiring impact-
or corrosion testing according to MDS/applicable
specifications.
Rolled and forged bars
Cut from over-length of bar.
Tests shall be carried out at one end and in the mid-length
position of one bar. Additional testing according to 10.3.3 shall
be carried out if section thickness exceeds 50 mm for all materials
requiring impact- or corrosion testing according to MDS/applicable
specifications.
Seamless pipe and tube
Cut from over-length of pipe
One pipe/tube shall be tested at one end and in the mid-length
position.
Strip Cut from strip. One end on one coil shall be tested with
three set of tests at each end located in the middle and at each
edge.
Valves machined from forgings
Tests from prolongation on actual forging
Testing according to the applicable MDSs. Additional testing may
be required depending on shape and functionality of the forging as
agreed with purchaser and Qualifying Company.
Welded pipe and tube
Cut from over-length of pipe or from test plate welded as
prolongation of the pipe/tube weld.
Weld and base material shall be tested at one end and in the
mid-length position on one pipe.
Wrought fittings - seamless and welded
Cut from sacrificial fitting, over-length of fitting or for
welded fittings test plates welded as a prolongation of the fitting
weld.
One fitting of each type shall be tested at one end as a
minimum. In addition different locations with different deformation
ratio should be tested, e.g. inner- and outer radii and neutral
zone for elbows. Tees should be tested both on one end and in the
crotch area. For welded fittings testing shall comprise base
material and weld(s).
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10.3.3 Additional testing Additional testing shall be carried
out as required in Table 2. For all materials having section
thickness/diameter exceeding 50 mm and requiring impact- or
corrosion testing according to MDS/applicable specifications,
additional testing shall be carried out as follows using specimens
located in the mid thickness position (T/2) and at a distance from
any second surface of T or at least 100 mm: a) impact testing in
axial and tangential direction. The minimum absorbed energy shall
be minimum
27 J/20 J (average/single values) tested at -46 C; b) corrosion
and micro-examination in accordance with the requirements specified
by the applicable MDS.
NOTE It is recognized that for certain applications corrosion
properties and microstructure in mid-thickness are not important
for the
functionality of the component as agreed with purchaser and
Qualifying Company. In such cases it may be agreed that the tests
shall be carried out for information only and a note about this
shall be included on the QTR front page.
10.4 Welding procedure qualifications The qualification exercise
shall include the supporting WPQR for the WPS for the following: a)
welded products in accordance with the applicable MDS; b) repair
welding of welds in accordance with the applicable MDS; c) minor
and major repair welding as defined in ASTM A 703 for castings.
11 Qualification test record (QTR)
11.1 General The manufacturer shall establish a qualification
test record (QTR) with content as listed in 11.2. The QTR shall be
issued with document and revision numbers. The QTR shall be
prepared with a front page with format and content as shown in
Annex D. It is essential that all documentation be accurate,
specific and in accordance with this NORSOK standard. The
documentation will otherwise be rejected and thereby also the
qualification.
11.2 Content of qualification test record (QTR) The content of
QTR shall contain the following: a) QTR front page. See format and
content as shown in Annex D.
b) Sect. 1 Table of content
c) Sect. 2 Manufacturing Summary, see Clause 8, including
1) process flow chart, 2) sketches showing typical samples with
dimensions of production test samples and location
and orientation of test specimens.
d) Sect. 3 Heat treatment procedure, see Clause 9, including 1)
report on the verification of heat treatment procedure, see 9.3, 2)
report on the temperature uniformity test, see 9.1.3 and Annex
B.
e) Sect. 4 Results of qualification testing including
1) description of component(s) tested for qualification.
Sketch(es) shall be prepared showing dimensions of test sample and
location and orientation of test specimens,
2) heat treatment chart(s) from the heat treatments of the
components used for the qualification testing,
3) test reports with results from qualification testing, 4)
start material certificate (when applicable).
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1) welded products: a list of WPSs/WPQRs shall be included, 2)
castings: the actual WPS/WPQRs for repair welding of minor and
major repairs shall
be included. g) Sect. 6 Specific reference list, see 7.1.2 h)
Sect. 7 Documentation of quality assurance system including
1) ISO certificate(s) according to ISO 9001, 2) Certificate of
compliance to PED 97/23/EC, Annex I, paragraph 4.3, as
available.
i) Sect. 8 MOM(s) from visit(s) to manufacturer by purchaser as
required in 5.2.
11.3 Required copies and distribution of qualification test
record (QTR) After acceptance one electronic copy, e.g. a CD, and
one paper copy shall be issued to the Purchaser having initiated or
ordered the qualification at the manufacturer and to the Qualifying
Company, if different from the Purchaser, which monitored the
qualification exercise and accepted the QTR by signing the QTR
front page. Additional distribution is at the manufacturers
discretion.
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Annex A (Informative)
Manufacturing Summary front page and example
Example of information, which shall be included on the front
page: Plant(s) and location(s): Actual plants, locations and
equipment facilities where
this procedure is relevant. Product(s): e.g. CLOSED DIE FORGINGS
Specification(s): e.g. NORSOK M-630, MDS D44 Rev. 4 Limitations in
the procedure:
Weigth: Length: Thickness: Other:
Qualification documentation: Ref. to the relevant
document(s)/reports/test result(s)
which confirm that manufacturing of materials in accordance with
this procedure will ensure satisfactory results per the actual
specification.
Other relevant information: Revision: Date: Made by: Checked by:
Approved by:
Manufacturing Summary No.:
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EXAMPLE OF MANUFACTURING SUMMARY (4 pages) Doc. No: MS-03 Page 1
of 4
MANUFACTURING SUMMARY TEE MADE BY FORGING
Seamless pipe Size 1 to 24 / Thickness 10 mm to 31,25 mm ASTM A
815 UNS S31803 MDS D43 REV. 24
(Prototype Tee 6 sch. 160)
N PHASE DESCRIPTION PROCEDURE
1 Identification of base material
Pipe to ASTM A 790 S31803 MDS D41 Rev. 24 N = 0,14 % to 0,20 %
Manufacturer:
POQ-05
2 PMI 100 % raw material. PMI-01 Rev.0 3 Cutting Cutting to
required length by saws. POQ-09 4 Identification
marking Hard stamping of last two number of heat number.
POQ-05
5 Heating Heating at xxxx C to xxxx 0 C, holding time minimum 1
min for each mm thickness. Temperature controlled by optical
pyrometer. Equipment = furnace bloss N 3 furnace gibbon N 2
POQ-09 I.O. 13 Rev.2
6 Ovalization Ovalization of pipe by pressing Equipment = 60 t;
100 t; 150 t; 200 t; 250 t; 300 t; 400 t; 900 t; 1200 t.
POQ-09 I.O. 13 Rev. 2
7 Re-heating Reheating at xxxx C to xxxx C, holding time minimum
1 min for each mm thickness. Temperature controlled by optical
pyrometer.
POQ-09 I.O. 13 Rev.2
8 Forming Forging by presses Start forming temperature xxxxC to
xxxxC Equipment = 60 t; 100 t; 150 t; 200 t; 250 t; 300 t; 400 t;
900 t; 1200 t. After forming the temperature shall not be less than
950 C.
POQ-09 I.O. 13 Rev.2
9 Cooling Quenching in cold water. 10 Cutting hole Cutting of
bulge. 11 Re-heating Re-heating at xxxx C to xxxx C, holding time
minimum 1 min
for each mm thickness. Temperature controlled by optical
pyrometer.
POQ-09 I.O. 13 Rev.2
12 Extrusion Extrusion of branch by press After extrusion the
temperature shall not be less than xxx C. Re-heating at xxxx C if
more than one step is necessary.
POQ-09 I.O. 13 Rev.2
13 Cooling Quenching in cold water.
14 Cutting Cutting to final dimensions by plasma, except section
connecting test samples to body of tee.
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Doc. No.: MS-03 Page 2 of 4
MANUFACTURING SUMMARY TEE MADE BY FORGING
Seamless pipe Size 1 to 24 / Thickness 10 mm to 31,25 mm ASTM A
815 UNS S31803 MDS D43 REV. 4
(Prototype Tee 6 sch. 160)
N PHASE DESCRIPTION PROCEDURE 15 Heat treatment Heat treatment:
Solution annealing in gas heating furnace
Equipment: Sottri truck-hearth with dimension of Furnace loading
temperature: room temperature Heating rate: xxxC/h (above xxxC)
Holding temperature: xxxxC Holding time: 1h/1 wall thickness or
minimum 15 min Quenching: In cold water max xx C within 60 s.
HT-01 Rev.3
16 Shot blasting Stainless steel grit. 17 Sampling Removal of
material for test samples. MDS D43 Rev.
24 Test sample plan N SP-01 Rev.1
18 Mechanical test According to NORSOK MDS D43 Rev.4 MDS D43
Rev. 4 Test sample plan N SP-01 Rev.1
19 Pickling Immersion in acid solution at temperature of xx C
Equipment: N 2 pickling vat 900 mm x 1600 mm x 1000 mm
PK-01 Rev.0
20 Machining Working of the ends as per purchase order. 21 Dye
penetrant test
According to ASTM A 815 Supplementary requirement S7 Accept
criteria: ASME VIII Div.1 100 % of the fittings.
ASME VIII Div.1 App.8
22 PMI 100 % of the fittings. PMI-01 Rev.0 23 Marking Marking by
low stress stamping according P.O. MDS D43 Rev.4
24 Visual and dimensional
By calibrated equipment. POQ-05 Drw. No. 972
25 Pickling Re-immersion in acid solution for final cleaning and
passivation.
PK-01 Rev.0
26 Final dossier Inspection certificate plus NDE certificates.
EN 10204, 3.1B
27 Packing According order requirements. ASTM E 700
Revision No. Date Made by Approved by Note Flow chart is shown
at page 4 coloured route.
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NORSOK standard M-650 Edition 4, September 2011
NORSOK standard Page 25 of 30
Doc. No.: MS-03 Page 3 of 4
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NORSOK standard M-650 Edition 4, September 2011
NORSOK standard Page 26 of 30
Doc. No.: MS-03 Page 4 of 4
EXAMPLE OF MANUFACTURING FLOW CHART
Manufacture flow chart for elbow and tee manufacture
ELBOW REDUCING & CAP BY FORGING
HEATING
OVALIZATION (ELBOWS ONLY)
FORMING
CUTTING OF ENDS
QUENCH
RE-HEATING (ELBOWS ONLY)
ELBOW BY MANDREL
HEATING
EXPANDING
CALIBRATION
QUENCH
CUTTING OF ENDS
TEE BY EXTRUSION
HEATING
OVALIZATION
RE-HEATING
QUENCHING
CUTTING HOLE
HEATING
EXTRUSION
QUENCHING
CUTTING OF ENDS
SEAMLESS PIPE
CUTTING
MARKING
HEAT TREATMENT
SAMPLING
MECHANICAL TEST
PICKLING
MACHINING
NDE EXAMINATION
MARKING
FINAL CLEANING
FINAL DOSSIER
PACKING
FORMING
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NORSOK standard M-650 Edition 4, September 2011
NORSOK standard Page 27 of 30
Annex B (Normative)
Additional requirements to API Spec 6A:2010/ISO 10423:2009 ,
Annex M, and ASTM A 991
B.1 General Temperature uniformity survey of quality heat
treatment furnaces shall be performed according to API Spec
6A:2010/ISO 10423:2009, Annex M, or ASTM A 991 with the following
additional requirements: a) the alternatives of attaching
thermocouples to the extremities of each load, see ASTM A 991, Para
1.4, or
the alternative surveying techniques described in ASTM A 991,
Para 7.7, are not acceptable as an alternative to the specified
temperature uniformity survey;
b) the temperature uniformity survey shall be carried out at the
maximum set point temperature for the actual materials to be
processed in the furnace. The maximum limit of 1 100 C stated in
ASTM A 991, Para 6.1.1.2, shall not apply;
c) the calibration shall be carried out with maximum load in the
furnace. This is to demonstrate that the required temperature
uniformity and the maximum temperature specified can be reached.
Subsequent calibrations, which shall be carried out annually, may
be carried out with empty furnace;
d) the documentation of the temperature uniformity survey shall
include sketch of the furnace with working zone of furnace and
number and location of thermocouples used for the survey, see API
Spec 6A:2010/ISO 10423:2009, Annex M, subclause M 3.3, or ASTM A
991, Paras 8.2.7 and 8.2.8;
e) uniformity survey shall to be performed annually for actual
furnaces included in Manufacturing Summary for solution heat
treatment;
f) the manufacturer shall establish a procedure for how to carry
out the temperature uniformity survey.
B.2 Batch type furnaces The following additional requirements to
ASTM A991 apply: a) for furnaces with set point temperature in the
working zone above 800 C the temperature at any point
shall not vary by more than 14 C from the furnace set point
temperature after the furnace working zone has been brought up to
temperature;
b) for furnaces with set point temperature in the working zone
below 800 C shall not vary by more than 8 C from the furnace set
point temperature after the furnace working zone has been brought
up to temperature;
c) once the furnace temperature has reached the set point
temperature, the temperature of all test locations shall be
recorded at maximum 2 min intervals for at least 10 min. Then
readings shall be taken at maximum 5 min intervals for sufficient
time to determine the recurrent temperature pattern of the furnace
working zone for at least 30 min.
B.3 Continuous conveyance and semi continuous conveyance
furnaces The temperature uniformity check may be carried out as
verification of the heat treatment procedure, see 9.3. In any case
the following requirements apply: a) the survey shall verify
that
1) the specified heat treatment temperature for a material can
be kept uniform within specified tolerances through the working
zone of the furnace as defined in the heat treatment procedure,
2) the defined component travel speeds in the heat treatment
procedure results in the minimum specified soaking time being
achieved, measured from when the set temperature is reached.
b) the temperature survey shall be carried out on actual
products. A minimum of two surveys shall be carried out with
products representing respectively the smallest (thinnest) and
largest (thickness) sizes to be heat treated.
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NORSOK standard M-650 Edition 4, September 2011
NORSOK standard Page 28 of 30
Annex C (Informative
Verification of heat treatment procedure Example
Comparison of time temperature curves of the contact
thermocouples (3 off) fixed to the load itself with the furnace
thermocouple. Note the time difference to reach set temperature
between the furnace thermocouple and the contact thermocouples
fixed onto the load. Pr
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NORSOK standard M-650 Edition 4, September 2011
NORSOK standard Page 29 of 30
Annex D (Normative)
Form for Qualification Test Record (QTR) Front Page
This form is available as a word file at the NORSOK home page
http://www.standard.no/. At the attached form examples of how to
fill in the form is given. Manufacturer logo Qualification Test
Record (QTR)
NORSOK M-650 QTR. No.:
Rev. No.:
Manufacturer name/address/ Web page:
Reference standard NORSOK M-650, Edition 4
Material designation and MDS No.:
Example: ASTM A182 Gr. F55; MDS D54, Revision 4.
Manufacturing Summary doc. No.:
Rev. No.:
Products and manufacturing process(es):
Example: Die forged flanges, Production route No. xx Forged
discs, Production route No. xx Rolled rings, Production route No.
xx
Mandatory conditions and sub-contractors:
Example: x Heat treatment by: XXXXXXXX x Forgings shall be
machined as close as possible to final shape prior to quality
heat treatment.
Other information: Example: x Pickling by XXXXXXX.
Qualification expires:
Tested and qualified thickness and weight Products and
manufacturing process(es):
Test record No.
Tested thickness
mm
Qualified thickness
mm
Test piece weight
kg
Qualified weight
kg Die forged flanges Abs 56 170 170 250 All
Forged discs Abs 57 55 60 70 140 Rolled rings Abs 58 130 130 300
All
Qualification/acceptance signatures Manufacturer: Prepared
by/Date: Checked by/Date:
The manufacturer and this QTR are evaluated and found to be in
compliance with the requirements of NORSOK M-650 for supply of the
above listed products and materials.
This acceptance does not exempt any purchaser from his
responsibility to ensure that this qualification is valid for his
products within the essential variables of NORSOK M-650.
Qualified/Accepted by (company name /address):
Signature/Date:
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