Coating Corrosion Rp f106

RECOMMENDED PRACTICENo. RP-F106

DET NORSKE VERITASVeritasveien 1, N-1322 Høvik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11

FACTORY APPLIED EXTERNAL PIPELINE COATINGSFOR CORROSION CONTROL

MARCH 2000

© Det Norske Veritas AS 2000Data processed and typeset by Division Technology and Products, Det Norske Veritas AS

Printed in Norway by Det Norske Veritas AS

FOREWORDDET NORSKE VERITAS (DNV) is an autonomous andindependent Foundation with the objectives ofsafeguarding life, property and the environment, at sea andonshore. DNV undertakes classification, certification, andother verification and consultancy services relating toquality of ships, offshore units and installations, andonshore industries world-wide, and carries out research inrelation to these functions.

DNV publishes various documents related to the offshoreindustry, aimed at promoting quality and safety onoffshore units and installations. These documents arepublished within a frame consisting of ServiceSpecifications, Standards and Recommended Practices, seefigure below.

DNV OFFSHORE

STANDARDS

OTHER DNV STANDARDS

DNV OFFSHORE

SERVICESPECIFICATIONS.

DNV GUIDELINES

& NOTESDNV RECOMMENDED PRACTICES

TECH

NICAL

PART

PROC

EDUR

AL P

ART

INTERNATIONAL CODES/STANDARDS

INTERNAT. RPs ETC.

The procedural basis for offshore verification services areprovided in DNV Offshore Service Specifications (OSS-series). The OSS-series of documents are divided into 3parts:

− Classification− Shelf Legislation Compliance Services− Certification and other Services

The technical requirements forming the basis for theverification services are given in DNV Offshore Standards(OS-series) as well as other codes and standards cited byDNV. The DNV OS-series is divided into 6 parts:

A. Quality and Safety MethodologyB. Materials TechnologyC. StructuresD. SystemsE. Special FacilitiesF. Pipelines & Risers

The Recommended Practice publications (RP-series) coverproven technology and solutions which have been foundby DNV to represent good practice, and which representone alternative for satisfying the requirements stipulated inthe DNV Offshore Standards or other codes and standardscited by DNV. The DNV RP-series is divided into 6 parts,identical to OS.

As well as forming the technical basis for DNVverification services, the Offshore Standards andRecommended Practices are offered as DNV’sinterpretation of safe engineering practice for general useby the offshore industry.

Comments may be sent by e-mail to [email protected] . For subscription orders or information about subscription terms, please use [email protected] .

Comprehensive information regarding DNV services, research and publications can be found at http://www.dnv.com , or can be obtained from DNV,Veritasveien 1, N-1322 Høvik, Norway; Tel +47 67 57 99 00, Fax +47 67 57 99 11.

© 2000 DET NORSKE VERITAS. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, includingphotocopying and recording, without the prior written consent of DET NORSKE VERITAS.

Printed in Norway by Det Norske Veritas AS

DET NORSKE VERITAS

CONTENTS

1. General .............................................................................. 41.1 Introduction........................................................................41.2 Scope...................................................................................41.3 Application.........................................................................41.4 Structure of Document .....................................................41.5 Relation to DNV OS−F101..............................................42. Normative References ................................................... 52.1 ASTM (American Society for Testing and

Materials)............................................................................52.2 AWWA (American Water Works Association) ..........52.3 BS (British Standards)......................................................52.4 CSA (Canadian Standards Association)........................62.5 DIN (Deutsche Industrie Normen).................................62.6 DNV (Det Norske Veritas)..............................................62.7 EN (European Standards)................................................62.8 GBE (Gas Business Engineering/British Gas).............62.9 ISO (International Organization for

Standardization).................................................................62.10 NACE (National Association of Corrosion

Engineers)...........................................................................72.11 NF (Normes Francaise)....................................................73. Definitions and Verbal Forms .................................... 74. Abbrevations ................................................................... 75. General Requrements ................................................... 85.1 Coating Manufacturing Procedure .................................8

5.2 Pre-Production Qualification Testing (PQT)................85.3 Quality Control..................................................................85.4 Coating Materials ..............................................................85.5 Initial (Receipt) Inspection of Pipes and Surface

Preparation..........................................................................95.6 Coating Application........................................................105.7 Inspection and Testing of Coated Pipes ......................105.8 Repairs ..............................................................................105.9 Documentation and Marking.........................................115.10 Handling and Storage of Pipes......................................11

ANNEX

Coating Data Sheet No.1:3-Layer Polyethylene or Polypropylene Coating..............13Coating Data Sheet No.2:Multi-Layer Polyethylene or Polypropylene Coating 17 17Coating Data Sheet No.3:Single or Dual Layer Fusion Bonded Epoxy Coating......18Coating Data Sheet No.4:Asphalt Enamel (or “Bitumen”) Coating ...........................20Coating Data Sheet No.5:Coal Tar Enamel Coating......................................................22Coating Data Sheet No.6:Polychloroprene (or “Vulcanised Rubber”) Coating .......24

4 Recommended Practice No. RP-F106

March 2000

DET NORSKE VERITAS

1. General

1.1 Introduction1.1.1 Submarine pipelines require external coatings withthe primary objective of corrosion protection. Certain coatingsystems are additionally designed to provide mechanicalprotection during installation and operation, or thermalinsulation. A corrosion protective coating is sometimescombined with a concrete coating for anti-buoyancy and/ormechanical protection during operation.

1.1.2 Pipeline coatings for external corrosion control areapplied to individual pipe lengths (typically about 12 meters)in a factory. The areas of the pipeline left uncoated tofacilitate girth welding are normally coated after weldingwith a so-called field joint coating system.

1.2 Scope1.2.1 This Recommended Practice includes the followingexternal coating systems for corrosion control of marinepipelines (including associated risers):

1) Glass fibre reinforced asphalt enamel coating2) Glass fibre reinforced coal tar enamel coating3) Single or dual layer fusion bonded epoxy (primarily for

use in combination with a concrete weight coating)4) 3-layer coatings based on an inner layer of liquid or

fusion bonded epoxy applied by spraying, anintermediate adhesive layer applied by spraying orextrusion, and an outer jacket of either polyethylene orpolypropylene applied by extrusion

5) Multi-layer coatings as for 4) above but with anintermediate layer of foamed or syntacticpolyethylene/polypropylene/polyurethane for thepurpose of thermal insulation

6) Polychloroprene (vulcanised rubber) coating (sometimesapplied for thermal insulation in addition to corrosioncontrol and mechanical protection)

Concrete weight coatings and field joint coatings are notincluded.

1.2.2 This document may be fully or partly applicable topipeline components (e.g. bends, tees, and reducers) usingthe above or similar coating systems, however, the user shallduly consider the needs for amendments and deviations.Methods, frequency/extent and acceptance criteria forinspection and testing associated with quality control shall beagreed prior to start of production.

1.2.3 Considerations of safety and environmental hazardsassociated with pipe coating are beyond the scope of thisdocument.

1.3 Application1.3.1 This Recommended Practice may be used as aguideline for the preparation of manufacturing specificationsfor external pipeline coating systems as defined in 1.2.1

above. It may also be used as an attachment to an inquiry orpurchase order specification for such coatings. Whenreferred to in a purchase document, all requirements in thisdocument are mandatory (see Section 3), unless otherwiseagreed.

1.3.2 Besides reference to this document, the followingadditional information shall be specified in purchasedocuments (see Section 3), as applicable to the specificcoating system and application:

− Coating type (coating system, colour and/or surfaceroughness, as relevant) and thickness (5.6.4)

− Specific requirements to pre-production qualificationtesting (5.2)

− Any special requirements to pipe receipt inspection, e.g.checking of dimensions or weight (5.5.3)

− Requirements to surface preparation by grinding otherthan “cosmetic” (5.5.9)

− Any special requirements to cleanliness of pipe ends andinternal surfaces (5.5.7 and 5.6.6)

− Pipe end configuration, e.g. cut back dimensions,bevelling and any use of end caps or other protection5.5.7 and 5.6.5)

− Methods and acceptance criteria for testing indicated“to be agreed” in the applicable Pipeline Coating DataSheet of the ANNEX (5.7.2)

− Any additional testing ( i.e. requested by Purchaser)indicated “by agreement” in the Pipeline Coating DataSheet (5.7.2), and any special conditions for testing (e.g.above ambient temperature)

− Permissible coating repairs, e.g. maximum number andsize (5.8)

− Specific requirements to pipe tracking, marking anddocumentation (5.9)

− Any special requirements to shipping (5.10.3)− Any further agreed deviations or amendments to this

document.

1.4 Structure of Document1.4.1 Requirements that apply to all types of externallinepipe coating systems are given in Section 5 whilst thoseapplicable to a specific system are contained in individualPipeline Coating Data Sheets in the ANNEX.

1.5 Relation to DNV OS−F101

1.5.1 DNV OS−F101 “Submarine Pipeline Systems”,Section 8, gives guidelines to the selection of pipelineexternal corrosion protective coatings, field joint coatingsand concrete coatings, and general requirements to theirmanufacturing. This document (i.e. RP−F106) providesdetailed requirements for the manufacturing of factoryapplied external corrosion protective coatings (see 1.3.1).

Recommended Practice No. RP-F106 5

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2. Normative ReferencesThe following standards are referred to in this document. Thelatest editions apply.

2.1 ASTM (American Society for Testing andMaterials)

ASTM C162 Glass and Glass Products, Definition ofTerms

ASTM C518 Test Method for Steady-State HeatFlux Measurements and Thermaltransmission Properties by Means ofHeat Flow Meter Apparatus

ASTM D638 Test Method for Tensile Properties ofPlastics

ASTM D695 Test Method for CompressiveProperties of Rigid Plastics

ASTM D696 Test Method for Coefficient of LinearThermal Expansion of Plastics

ASTM D785 Test Method for Rockwell Hardness ofPlastics and Electrical InsulatingMaterials

ASTM D870 Practice for Testing Water Resistanceof Coating Using Water Immersion

ASTM D1002 Test Method for Apparent ShearStrength of Single-Lap-JointAdhesively Bonded Metal Specimensby Tensile Loading

ASTM D1149 Test Method for Rubber Deterioration– Surface Ozone Cracking in aChamber

ASTM D1238 Test Method for Flow Rates ofThermoplastics by ExtrusionPlastometer

ASTM D1525 Test Method for Vicat SofteningTemperature of Plastics

ASTM D2240 Test Method for Rubber Property-Durometer Hardness

ASTM D3895 Test Method for Oxidative-InductionTime of Polyolefins by DifferentialScanning Calorimetry

ASTM D4060 Test Method for Abrasion Resistanceof Organic Coating by the TaberAbrader

ASTM D4285 Test Method for Indicating Oil orWater in Compressed Air

ASTM E797 Practice for Measuring Thickness byManual Pulse-Echo Contact Method

ASTM G8 Test Method for Cathodic Disbondingof Pipeline Coating

ASTM G14 Test Method for Impact Resistance ofPipeline Coatings (Falling WeightTest)

ASTM G17 Test Method for Penetration Resistanceof Pipeline Coatings

ASTM G21 Recommended Practice forDetermining Resistance of SyntheticPolymeric Materials to Fungi

ASTM G22 Practice for Determining Resistance ofPlastics to Bacteria

2.2 AWWA (American Water Works Association)AWWA C-203 Coal-Tar Enamel Protective Coatings

and Linings for Steel Water Pipelines-Enamel and Tape Hot Applied

2.3 BS (British Standards)BS 410 Specification of Test Sieves

BS 903 Part A1 Physical Testing of Rubber.Determination of Density

BS 903 Part A6 Method for Testing VulcanisedRubber. The Resistance of VulcanisedRubber to Liquids

BS 903 Part A16 Vulcanised Rubber. Determination ofthe Effects of Liquids

BS 2000 Part 33and Part 170

Methods for the Determination of FlashPoint by the Abel Apparatus

BS 2000 Part 49 Methods for Determination ofSoftening Point of Bitumen (Ring andBall)

BS 3900 Part A6 Paints and varnishes. Determination ofFlow Time by Use of Flow Cups

BS 3900 Part F4 Methods of Tests for Paints; Resistanceto Continuous Salt Spray

BS 4147 Bitumen-Based Hot-Applied CoatingMaterials for Protecting Iron AndSteel, Including Suitable PrimersWhere Required

BS 4164 Coal-Tar-Based Hot-Applied CoatingMaterials for Protecting Iron AndSteel, Including a Suitable Primer


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BS 6374 Lining of Equipment with PolymericMaterials for the Process IndustriesPart 5. Specification of Lining withRubber

2.4 CSA (Canadian Standards Association)CAN/CSA-Z245.20/21

External Fusion Bond Epoxy Coatingfor Steel Pipe-External PolyethyleneCoating for Pipe

2.5 DIN (Deutsche Industrie Normen)DIN 30670 Polyethylene Coatings for Steel Pipes

and Fittings

DIN 30671 Umhüllung (Aussenbeschichtigung)von erdverlagten Stahlrohren mitDuroplasten

DIN 30678 Polypropylene for Steel Pipes

DIN 12111 Testing of Glass; Determination ofWater Resistance (Grain TitrationMethod) and Classification of Glass inHydrolytic Classes

DIN 53516 Prüfung von Kautschuk undElastomeren. Bestimmung des Abriebs.

2.6 DNV (Det Norske Veritas)DNV OS−F101 Submarine Pipeline Systems

2.7 EN (European Standards)EN 10204 Metallic Products – Types of

Inspection Documents

prEN 10285

(draft standard)

Steel Tubes and Fittings for Onshoreand Offshore Pipelines – ExternalThree Layer Extruded PolyethyleneBased Coatings

prEN 10286

(draft standard)

Steel Tubes and Fittings for Onshoreand Offshore Pipelines – ExternalThree Layer Extruded PolypropyleneBased Coatings

2.8 GBE (Gas Business Engineering/British Gas)GBE/CW6 Technical Specification for the

External Protection of Steel Linepipeand Fittings Using Fusion BondedPowder and Associated CoatingSystems

2.9 ISO (International Organization forStandardization)

ISO 34 Rubber, Vulcanised or Thermoplastic.Determination of Tear Strength

ISO 37 Rubber, Vulcanised or Thermoplastic –Determination of Tensile Stress- StrainProperties

ISO 188 Rubber, Vulcanised or Thermoplastic –Accelerated Ageing and Heat-Resistance Tests

ISO 306 Plastics-Thermoplastic Materials –Determining of Vicat SofteningTemperature

ISO 527 Plastics – Determination of TensileProperties. Part 1 and 2.

ISO 815 Rubber, Vulcanised or ThermoplasticDetermination of Compression Set atAmbient, Elevated or LowTemperatures

ISO 845 Cellular Plastics and Rubbers –Determination of Apparent (Bulk)Density

ISO 868 Plastics and Ebonite – Determinationof Indentation Hardness by Means of aDurometer (Shore Hardness)

ISO 1133 Plastics – Determination of the MeltMass-Flow Rate (MFR) and the MeltVolume- Flow-Rate (MVR) ofThermoplastics

ISO 1183 Plastics – Methods for Determining theDensity and Relative Density of Non-Cellular Plastics

ISO 1515 Paints and Varnishes – Determinationof Volatile and Non-Volatile Matter

ISO 2409 Paints and Varnishes – Cross-Cut Test

ISO 2431 Paints and Varnishes – Determinationof Flow Time by Use of Flow Cups

ISO 2655 Plastics – Resins in the Liquid State oras Emulsions or Dispersions –Determining of Apparent Viscosity bythe Brookfield Test

ISO 2808 Paints and Varnishes – Determinationof Film Thickness

ISO 2811 Paints and Varnishes – Determinationof Density


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ISO 2815 Paint and Varnishes – BuchholzIndentation Test

ISO 4287-1 Surface Roughness – Terminology –Part 1: Surface and Its Parameters

ISO 4624 Paints and Varnishes – Pull-Off Testfor Adhesion

ISO 4892-2 Plastics – Methods of Exposure toLaboratory; Light Sources

ISO 7253 Paints and Varnishes-Determination ofResistance to Neutral Salt Spray

ISO 8501-1 Preparation of Steel Substrate forApplication of Paint and RelatedProducts-Visual Assessment of SurfaceCleanliness.Part 1: Rust Grades and PreparationGrades of Uncoated Steel Substrates.

ISO 8502-3 Preparation of Steel Substrates BeforeApplication of Paints and RelatedProducts-Test for the Assessment ofSurface Cleanliness– Part 3: Assessment of Dust on SteelSurfaces Prepared for Painting(Pressure Sensitive Tape Method)

ISO 8502-6 –Part 6: Sampling of SolubleImpurities on Surfaces to be Painted – the Bresle Method.

ISO 8503-2 Preparation of Steel Substrates BeforeApplication of Paints and RelatedProducts- Surface RoughnessCharacteristics of Blast CleanedSubstrates– Part 2: Method for the Grading ofSurface Profile of Abrasive Blast-Cleaned Steel – Comparator Procedure

ISO 8503-4 – Part 4: Method for the Calibration ofISO Surface Profile Comparators andfor the Determination of SurfaceProfile – Stylus Instrument Procedure

ISO 10005 Quality Management- Guidelines forQuality Plans

ISO 10474 Steel and Steel Products– Inspection Documents

2.10 NACE (National Association of CorrosionEngineers)

NACE RP0274 High Voltage Electrical Inspection ofPipeline Coatings Prior to Installation

2.11 NF (Normes Francaise)NF A 49-710 External 3- Layer Polyethylene Based

Coating. Application by Extrusion

NF A 49-711 External 3- Layer Polypropylene BasedCoating. Application by Extrusion

3. Definitions and Verbal Forms

Purchaser party issuing contract for coating work,or nominated representative

Contractor party to whom the coating work has beencontracted

Shall indicates a mandatory requirement

Should indicates a preferred course of action

May indicates an permissible course of action

Agreed/Agreement refers to a written arrangement betweenPurchaser and Contractor (e.g. as stated in a contract)

Report and Notify refers to an action by Contractor inwriting

Accepted/Acceptance refers to a confirmation by Purchaserin writing

Certified refers to confirmation of specified properties issuedby Contractor or manufacturer of coating materialsaccording to EN 10204:3.1.B, ISO 10474:5.1.B or equivalent

Purchase Document(s) refers to an inquiry/tender orpurchase/contract specification, as relevant

4. Abbrevations

FBE Fusion Bonded Epoxy

ITP Inspection and Testing Plan (see 5.3.1)

LE Liquid Epoxy

MPS (Coating) Manufacturing ProcedureSpecification (see 5.1)

PE Polyethylene (polyethene)

PP Polypropylene (polypropene)

PQT (Coating) Pre-Production QualificationTesting (see 5.2)

QPS (Coating) Qualification ProcedureSpecification (see 5.2.2)


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5. General Requrements

5.1 Coating Manufacturing Procedure5.1.1 All work associated with coating manufacturing shallbe described in procedures which shall be compiled in aCoating Manufacturing Procedure Specification (MPS). Thisdocument shall be submitted to Purchaser prior to start ofcoating work, and shall include:

− coating materials (incl. manufacturer’s product datasheets)

− surface preparation (general information; for specificrequirements, see 5.3)

− coating application (incl. control of essential processparameters)

− inspection and testing (general information; for specificrequirements, see 5.3)

− coating repairs and stripping of unrepairable coating.− preparation of pipe ends after coating− marking and documentation− handling and storage of coated and uncoated pipes.

Procedures for the last four items are subject to acceptanceby Purchaser. Some detailed requirements to items forinclusion in the coating manufacturing specification aregiven in 5.4 –5.10.

5.2 Pre-Production Qualification Testing (PQT)5.2.1 Coating materials (i.e. manufacturer’s specification)and coating manufacturing procedures (including repairs)shall be qualified prior to, or (if agreed) during the plantstart-up phase. Purchaser may choose to accept results from aprevious qualification using identical coating materials andprocess parameters, and similar pipe dimensions. However,significant changes of process parameters, coating materialspecification or pipe dimension require re-qualification.Specific requirements to pre-production qualification testing,including e.g. number of pipes to be coated and schedule forreporting, shall be specified in purchase documents (see1.3.2).

5.2.2 If a project specific qualification is to be carried out, aCoating Qualification Procedure Specification (QPS) and aschedule for application, inspection/testing and reportingshall be submitted to Purchaser for acceptance in due timeprior to start-up of the qualification activities.

5.2.3 Coating application temperature, and drying or curingconditions, shall be according to coating materialmanufacturer’s recommendations.

5.2.4 Purchaser shall have the right to select or acceptpipe(s) for inspection and testing. Unless otherwise agreed,test methods and acceptance criteria shall be in accordancewith the applicable Pipeline Coating Data Sheet in theANNEX of this document. Testing of properties included inthe Pipeline Coating Data Sheet and with a frequency/extent

of testing noted as “by agreement” (see 5.7.2) shall bespecified in purchase documents.

5.2.5 Qualification of coating repairs shall as a minimuminclude testing for holidays and adhesion.

5.2.6 Results from all inspection, testing and calibrationsduring qualification, essential operational parameters forcoating, and coating material certificates shall be compiled ina PQT report. If stated in purchase documents, the reportshall be accepted by Purchaser prior to start of production.

5.3 Quality Control5.3.1 Prior to start-up of production, Contractor shallsubmit to Purchaser for acceptance:

- MPS updated to reflect the process parameters used duringthe PQT (if different from those specified in the MPSsubmitted to Contractor prior to PQT)- a project specific Inspection and Testing Plan (ITP)meeting the general requirements of ISO 10005, Section5.10. The plan shall describe all quality control activitieswith reference to the inspection, testing and calibrationprocedures that shall apply for the specific project- a daily log format (see 5.7.5).

5.3.2 Unless otherwise agreed (see 1.3.2), methods andfrequency of inspection and testing, as well as acceptancecriteria shall be in accordance with the applicable PipelineCoating Data Sheet in the ANNEX of this document.

5.3.3 The MPS, ITP, and daily log shall be in English,unless otherwise agreed.

5.3.4 Procedures and work instructions referenced in theITP, and applicable acceptance criteria, shall be available toall persons concerned with the associated work.

5.3.5 Purchaser shall have the right to inspect all activitiesassociated with coating manufacturing, including surfacepreparation and inspection/testing of coated pipes. Purchasershall identify any hold points for witnessing (see 5.7.1) in theITP and inform Contractor accordingly.

5.4 Coating Materials5.4.1 Contractor shall verify that all coating materials andabrasives received are in accordance with the specifiedrequirements in the purchase order/product data sheet. Theverification may include actual testing by Contractor himself(or by a third party), and/or review of manufacturer’scertificates. Any verification testing to be performed byContractor shall be included in the ITP.

5.4.2 Testing of coating material properties may relate toproperties of raw materials (i.e. “as delivered”), or toproperties of processed materials (i.e. “as-applied”). In thelatter case, test panels with applied coating, or speciallyprepared coating layers (i.e. without substrate) are used.


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5.4.3 Coating material properties related to raw materials asdelivered for coating shall be certified (see 3) per batch/lot,in accordance with the relevant Pipeline Coating Data Sheetin the ANNEX. (In the case of continuous production,“batches” will not apply and a “lot” shall be defined based one.g. hours or weight/volume of production). For certain as-applied properties of the coating, and in particular thoserelated to resistance to long-term environmental degradation,data for a representative product specification (i.e. notbatch/lot specific) will normally apply. Purchaser mayrequire witnessing or third party testing of as-applied coatingmaterial properties in order to qualify a specific coatingproduct, or to verify properties of individual batches/lots ofcoating material. (To be specified in purchase documents ifapplicable).

5.4.4 Until compliance with specified requirements hasbeen confirmed, the coating materials received by Contractorshall be kept physically separated from checked materials.Any materials checked and found non-conforming shall beclearly marked and quarantined.

5.4.5 All materials to be used for surface preparation andcoating of pipes shall be contained in their original packinguntil use and shall be adequately marked, including:

− manufacturer’s name− material type− batch/lot number− weight (for materials in drums, bags or similar)− size (for materials in rolls or similar)− date of manufacturing (and shelf life, if applicable)− manufacturing standard (if applicable)

5.4.6 Contractor shall ensure that all materials for coatingand surface preparation are stored and handled so as to avoiddamage by climatic or other effects. Manufacturer’srecommendations for storage and use shall be readilyavailable for Purchaser’s review.

5.4.7 Recycled coating materials may be used if detailed inthe MPS, stating e.g. requirements to cleaning and maximumaddition to virgin coating material. It shall further bedemonstrated that such use does not affect the specifiedproperties.

5.5 Initial (Receipt) Inspection of Pipes and SurfacePreparation

5.5.1 All surface preparation and associated inspection andmonitoring activities shall be carried out according to thequalified MPS (5.1) and ITP (5.3.1). Methods, acceptancecriteria and frequency/extent of inspection and testing shallcomply with requirements given in the Pipeline Coating DataSheets in the ANNEX, and/or amendments in purchasedocuments (see 1.3.2) if applicable.

5.5.2 Linepipe may be delivered to Contractor with orwithout a temporary external corrosion protection (e.g.varnish type). On receipt, every pipe shall be identified by aunique number and any additional marking to maintainidentity shall be performed as specified or accepted by

Purchaser (5.9.1). Intermediate storage of pipes shall beaccording to 5.10.

5.5.3 Each pipe shall be subject to an initial visualexamination. Particular emphasis shall be laid onexamination of pipe ends. Pipes with severe damage such asdents, ovality, cuts and other defects that cannot be correctedby surface dressing shall be removed and Purchaser notifiedaccordingly. Any requirements to checking of pipedimensions and/or weight shall be specified in purchasedocuments.

5.5.4 Salts, soils and other loose contamination shall beremoved from the pipe surface using a suitable water-basedcleaning method (e.g. high-pressure fresh water or brushing).Organic contaminants like oil and grease shall be removedby using suitable solvents or detergents. Purchaser shall benotified promptly if the surface condition of the receivedpipes is deemed to affect the quality of the coating.

5.5.5 Pipe surfaces shall be prepared for coating using blastcleaning to provide a surface cleanliness and surfaceroughness (anchor pattern) as specified in the applicablePipeline Coating Data Sheet of the ANNEX. Relevantproperties of blasting materials shall be documented. Theblasting material and pressurised air system shall be kept dryand free from injurious contaminants, including salts, oil andgrease. Recycled blasting material shall be checked forcleanliness at regular intervals (to be specified in the ITP).Checking of oil contamination shall be carried out accordingto ASTM D4285.

5.5.6 For stainless steel pipes, abrasives shall be based onfused aluminium oxide or stainless steel shot according to anappropriate standard. Precautions shall be taken to avoidcontamination by e.g. residual C-steel particles.

5.5.7 Special protection of machined bevels and/or internalsurfaces, e.g. by use of end caps during cleaning, may apply.(To be specified in purchase documents).

5.5.8 During blast cleaning, the pipe surface shall be atleast 3 oC above the dew point temperature and the ambientrelative humidity should not exceed 85%. Pre-heating ofpipes is required if humidity is higher.

5.5.9 After the blast cleaning, the pipes shall be thoroughlychecked. Marking of defects (if applicable) shall be carriedout using “French Chalk” only. Any slivers, swabs, burns,laminations or gouges shall be removed by cosmeticgrinding. (Requirements to more excessive grinding shall bespecified in purchase documents). The remaining wallthickness shall comply with the applicable linepipespecification. (Checking of remaining wall thickness byultrasonic testing shall be according to ASTM E797 orequivalent). Pipes with any dressed area larger than 10 cm2

shall be completely re-blasted. Unrepairable pipes shall bequarantined and Purchaser notified accordingly.


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5.5.10 Dust or abrasive remains shall be removed from thepipe surface using dry clean air, vacuum cleaning orbrushing. Surface cleanliness and roughness shall be verifiedas detailed in the applicable Pipeline Coating Data Sheet inthe ANNEX. Measurements of residual salt contaminationmay be performed using special proprietary equipment ifspecified in the inspection and testing plan, and provided thatcompliance with the referenced standard can bedemonstrated. Pipes not meeting specified requirements shallbe subject to new blast cleaning or rejection.

5.5.11 Special precautions shall be taken to avoid rustingand/or contamination after completed surface preparation.Requirements to maximum duration (in hours) betweenblasting and coating, and/or maximum relative humidityshall be specified in the MPS.

5.5.12 Mechanical surface preparation may be followed by achemical treatment if stated in the MPS.

5.6 Coating Application5.6.1 All coating work shall be carried out according to thequalified MPS (see 5.1).

5.6.2 Throughout coating application, essential parametersaffecting the quality of the coating (e.g. applicationtemperature of linepipe and coating materials, relativehumidity, etc) shall be monitored on-line and recordingsnoted in the daily log (5.7.5). For certain coating systems, theapplication temperature shall be continuously monitored asspecified in the applicable Pipeline Coating Data Sheet in theANNEX.Equipment for monitoring shall be calibrated atscheduled intervals as specified in the ITP (5.3.1).

5.6.3 Coated pipes shall be traceable to individualbatches/lots of coating materials.

5.6.4 Coating thickness (nominal and minimum values ofindividual layers, maximum if applicable) shall be defined inpurchase documents (i.e. unless thickness is stated in thePipeline Coating Data Sheet).

5.6.5 The length and surface condition of pipe ends to beleft uncoated (or “cut-back” if applicable), and anychamfering of edges, shall be detailed in purchasedocuments. Any use of temporary coatings or tapes to maskcoating application at pipe ends shall be described in theMPS.

5.6.6 Any remainders of coating or blasting materials onthe internal pipe surface shall be removed. Specialrequirements to cleanliness of internal surfaces, if applicable,shall be specified in purchase documents.

5.7 Inspection and Testing of Coated Pipes5.7.1 Coated pipes shall be inspected and tested accordingto the ITP (5.3.1). Purchaser shall be allowed to witness allinspection and testing. For special hold points identified byPurchaser (see5.3.5), Contractor shall give adequate noticefor Contractor to arrange for witnessing.

5.7.2 Inspection and testing of coated pipes duringqualification and production shall be carried out according tothe applicable methods, acceptance criteria and frequenciesspecified in the applicable Pipeline Coating Data Sheet andany amendments made in purchase documents (see 1.3.2).The following notes apply to all Pipeline Coating DataSheets:

“According to ITP” means that testing method and/oracceptance criteria (as applicable) shall be defined in the ITP

“to be included” under “Frequency/Qualification” means thattesting shall be included during qualification.

“to be agreed” means that testing shall be carried out, andthat test method and/or acceptance criteria (as applicable) aresubject to agreement (preferably to be specified in purchasedocuments).

“by agreement” means that Purchaser may require testing,and that methods and acceptance criteria are subject toagreement (to be specified in purchase documents).

5.7.3 Failures during testing which are obviously due todefective sampling or operational errors of testing equipmentmay be disregarded and testing repeated on the same pipe.

5.7.4 Individual pipes not meeting specified criteria shallbe re-coated, or if possible (see 5.8), repaired. In case offailure of a pipe coating during fractional testing (e.g. each20th pipe or twice per shift), the preceding and followingpipes shall be tested individually until at least 3 successivepipes show adequate properties. In the case of repeatedfailures to meet specified acceptance criteria, Purchaser mayrequire testing frequency to be increased. Similarly, subjectto acceptance by Purchaser, testing frequency may bereduced as a result of successful testing demonstratingadequate quality.

5.7.5 All data from inspection and testing of coated pipes,major coating repairs, essential operating parameters (e.g.application temperature, pipe feed rate, etc.) and calibrationof testing and monitoring equipment, shall be noted in a dailylog. For pipe specific data, reference shall be made to theunique pipe number (5.5.2). The log shall be up-dated on adaily basis and is to be available for Purchaser’s review atany time during manufacturing.

5.8 Repairs5.8.1 Maximum permissible repairs (e.g. maximum surfacearea of individual repair, maximum repairs per pipe andmaximum number of pipes with repairs) and requirements todocumentation of repairs shall be specified in purchasedocuments (1.3.2).


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DET NORSKE VERITAS

5.8.2 Stripping of unrepairable coating for re-coating shallbe carried out according to a procedure accepted byPurchaser. Coating repairs shall be carried out and inspectedaccording to a qualified procedure (5.1).

5.9 Documentation and Marking5.9.1 Specific requirements to pipe tracking (e.g. electronicformat), marking and documentation format shall bespecified in purchase documents (1.3.2).

5.9.2 Results from inspection and testing duringqualification and production shall be documented and betraceable to a unique pipe number and individual coatingmaterial batches/lots. For specific requirements to a dailylog, see 5.7.5.

5.9.3 Documentation, including coating materialcertificates, shall be retained by Contractor for minimum 5years, or as agreed upon.

5.9.4 Contractor shall issue an inspection documentcorresponding to the requirements given in EN 10204,inspection certificate 3.1.B or ISO 10474, inspectioncertificate 5.1.B.

5.10 Handling and Storage of Pipes5.10.1 Pipes shall be handled and stored such that damage tocoated and uncoated surfaces is avoided. The applicableprocedure is subject to acceptance by Purchaser. Stainlesssteel pipes require special considerations to avoid surfacecontamination (e.g. from use of C-steel tools). Purchaser mayrequire documentation (e.g. by calculations) that a specifiedmaximum stack height cannot cause any damage.

5.10.2 Damage to coatings during handling or storage shallbe repaired according to 5.8, whilst any damage to linepipematerial shall be reported to Purchaser. (Damaged pipes shallbe separated and quarantined).

5.10.3 Any packaging or other means of protection of coatedpipes for shipping shall be defined in purchase documents(1.3.2).


March 2000

DET NORSKE VERITAS


March 2000

NOTE: “ACCORDING TO ITP”, “ TO BE INCLUDED”, “ TO BE AGREED” AND “BY AGREEMENT” ARE EXPLAINED IN 5.7.2

DET NORSKE VERITAS

ANNEX

Coating Data Sheet No.1: 3-Layer Polyethylene or Polypropylene Coating (3 pages)

Coating ConfigurationEpoxy primer FBE: min. 100-250 µm, max. 550µm (to be agreed for inclusion in ITP)

LE: min. 30-50 µm ( to be agreed for inclusion in ITP)Polymeric adhesive According to ITPPolyethylene or polypropylene outer sheath According to ITPTotal thickness min. 2.0 mm (to be agreed for inclusion in ITP)

Coating Materials

Item/Property Test method Acceptance criteria Frequency

Epoxy primer material

Density (FBE/LE) ISO 2811 According to product data sheet Every batch/lotParticle size (FBE) According to product data sheet According to product data sheet Every batch/lotMax. moisture content (FBE) According to product data sheet According to product data sheet Every batch/lotGel time (FBE) According to product data sheet According to product data sheet Every batch/lotGlass transition temperature(FBE)

NF A 49-710/711(prEN 10285/10286) orGBE/CW6 part 1, App. A

According to product data sheet(min. 5 oC above pipeline max.operating temperature)

Every batch/lot

Viscosity of base and hardener(LE)

ISO 2655 According to product data sheet Every batch/lot

Volume solids of the base andhardener (LE)

ISO 1515 According to product data sheet Every batch/lot

Infrared scan by agreement by agreement by agreementWater resistance ASTM D870,

3000 hrs at 85 oC orNo blistering,swelling < 5 %Loss of hardness <10 %

by agreement

GBE/CW6 part 1, App. A According to standard

Salt spray test ISO 7253, 4000 hrs orBS 3900, Part F4 No rusting, no blistering by agreement

Cathodic disbonding ASTM G8 orGBE/CW6, part 1, App. E orNF A 49-710/711(prEN 10285/10286)or other agreed procedure

by agreement by agreement

Adhesive material

Density ISO 1183 According to product data sheet Every batch/lotParticle size (for spraying) According to product data sheet According to product data sheet Every batch/lotMelt flow index/rate ISO 1133 or ASTM D1238 According to product data sheet Every batch/lotSoftening point (Vicat) ISO 306 or ASTM D1525 According to product data sheet Every batch/lot

Polyethylene or Polypropylene material

Density ISO 1183 According to product data sheet Every batch/lotMelt flow index/rate ISO 1133 or

ASTM D1238According to product data sheet Every batch/lot

Softening point (Vicat) ISO 306 or ASTM D1525 According to product data sheet Every batch/lotThermostabilisation ASTM D3895 by agreement by agreementUV resistance ISO 4892-2 or DIN 30670 or

NF A 49-710/711(prEN 10285/10286)

by agreement (ISO) oraccording to standard (NF/EN) by agreement

Abrasion resistance ASTM D4060 orDIN 53516 by agreement by agreement

Fungi resistance ASTM G21 no growth by agreement


March 2000


DET NORSKE VERITAS



Bacteria resistance ASTM G22 no growth by agreementWater absorption BS 903, A16 by agreement by agreementThermal conductivity ASTM C518 by agreement by agreementThermal stability/ageing DIN 30670 or

NF A 49-710/711(prEN 10285/10286)

According to standard orby agreement by agreement

Linear expansion ASTM D696 by agreement by agreementModulus of elasticity ASTM D638

5 mm/minby agreement by agreement

Surface Preparation

FrequencyItem/Property Test method Acceptance criteria

PQT Production

Initial surfacecondition

Visual examination Dry and free from contamination (oil,grease, etc.) and surface defects

to be included Every pipe

Pipe temperature andrelative humidity

According to ITP Pipe temperature min.3 oC above dew point

to be included Minimum once per hour

Salt contaminnationafter blast cleaning

ISO 8502-6 oragreed method

max. 20 mg NaCl/m2 to be included First 5, then 1/30both pipe ends

Surface cleanliness ISO 8501-1 A/B ≥ Sa 2 ½. to be included Every pipeSurface cleanliness ISO 8502-2 Rating max. 2 to be included First 5, then 1/30

both pipe endsSurface roughness ISO 8503-4 RY5 min. 40 µm; max 100 µm to be included First 5, then 1/30

both pipe endsFinal surfacecondition

Visual examination Free from surface defects to be included Every pipe

Pipe temperature priorto chemical treatment(if specified in MPS)

According to ITP According to ITP to be included Continuous monitoring

Coating Pre-Production Qualification Testing (PQT) and Production Control

FrequencyItem/Property: Test method Acceptance criteria

PQT Production

Epoxy layer

Pipe temperature According to ITP According to ITP to be included Continuous monitoringThickness ISO 2808

or by agreementAccording to ITP to be included First pipe and start/lead

pipe 1), then one pipeevery shift(to be performed byallowing application tolimited area of maskedpipe end)

Degree of cure FBE: differentialthermal analysisaccording toNF A 49-710/711(prEN 10285/10286)or by agreementLE: According to ITP

FBE: ∆TG = max 2 oC

LE: According to ITP

to be included First pipe, start/leadpipe1) then one pipeevery shift. (to beperformed by allowingapplication to limitedarea of masked pipeend)

Hardness ISO 2815 by agreement by agreement by agreementAdhesion ISO 2409 or

ISO 4624 orDIN 30671or by agreement

Classification: 0 (ISO 2409)min. 34 MPa (ISO 4624)No detachment (DIN 30671)


Porosity CAN/CSA-Z245.20 by agreement by agreement by agreement


March 2000


DET NORSKE VERITAS


1) “start/lead pipe” refers to first pipe after interupted coating

FrequencyItem/Property: Test method Acceptance criteria

PQT Production

Adhesive Layer

Thickness According to ITP According to ITP to be included by agreement

Full layer

Coating materialand pipetemperatures


Pipe feed rate According to ITP According to ITP to be included Continuous monitoring

Appearance ofcoating

Visual According to ITP to be included,100% surface area

Every pipe,100% surface area

Pipe endconfiguration

According to ITP According to ITP to be included Every pipe,both pipe ends

Holiday detection NACE RP0274,10 kV/mm nominalthickness, max 25 kV,200-300 mm/s orNF A 49-710/711(prEN 10285/10286)

no holidays to be included,100% surface area

Every pipe,100% surface area(visual/accoustic alarmfunction)

Thickness NF A 49-710/711(prEN 10285/10286)or agreed procedure

According to purchase order and ITP to be included Every pipeor by agreement

Adhesion(peel strength)

NF A 49-710/711(prEN 10285/10286)or DIN 30670/30678

min. 150 N/cm, 20 oCTesting at higher temperature byagreement

to be included First pipe and start/leadpipe 1),then one per shift,both pipe ends

Impactresistance

NF A 49-710/711(prEN 10285/10286)or DIN 30670/30678

according to standard to be included First pipe and start/leadpipe 1),or by agreement

Indentationresistance

NF A 49-710/711(prEN 10285/10286)or DIN 30670/30678

max 0.10 mm, 20 oCTesting at higher temperature byagreement

to be included First pipe for eachPE/PP batch

Elongation at break ASTM D638 or ISO 527 orNF A 49-710/711(prEN 10285/10286)

PE: min. 400%, 20 oCPP: min. 300%, 20 oCTesting at higher/lower temperature byagreement

to be included First pipe for eachPE/PP batch

Tensile strength ASTM D638 or ISO 527 orNF A 49-710/711(prEN 10285/10286)

by agreement to be included First pipe for eachPE/PP batch

Hardness ASTM D785 orISO 868

by agreement by agreement by agreement

Bending resistance(flexibility)

by agreement by agreement by agreement not applicable

Electrical insulationcapacity

NF A 49 –710/711(prEN 10285/10286)

by agreement by agreement not applicable

Cathodicdisbonding

ASTM G8 orGBE/CW6 orNF A 49 –710/711(prEN 10285/10286or other agreedprocedure

by agreement by agreement not applicable

Shear strength ASTM D1002 by agreement by agreement not applicable

Heat resistance(by melt flow index)

NF A 49 –710/711(prEN 10285/10286


Residual magnetism by agreement by agreement by agreement by agreement


March 2000


DET NORSKE VERITAS


1) “start/lead pipe” refers to first pipe after interupted coating


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.2: Multi-Layer Polyethylene or Polypropylene Coating(1 page)

Coating Configuration (typical)Epoxy primer FBE: min. 100-300 µm, max. 500 µm (to be agreed for inclusion in ITP)

LE: min. 30-50 µm, (to be agreed for inclusion in ITP)Polymeric adhesive According to ITPPolyethylene or polypropylene intermediate sheath According to ITPPolyethylene or polypropylene foam or syntactic layer To be agreed for inclusion in ITPPolyethylene or polypropylene outer sheath According to ITPTotal thickness To be agreed for inclusion in ITPCoating Materials


Epoxy primer material

as for 3-layer coatings as for 3-layer coatings as for 3-layer coatingsAdhesive material

as for 3-layer coatings as for 3-layer coatings as for 3-layer coatingsPolyethylene or Polypropylene Foam Material

Density According to product data sheet According to product data sheet Every batch or deliveryMelt index ISO 1133 According to product data sheet Every batch or deliverySoftening point ISO 306 According to product data sheet Every batch or deliveryElongation ISO 527 According to product data sheet Every batch or deliveryPolyethylene or Polypropylene Sheathing Material

as for 3-layer coatings as for 3-layer coatings as for 3-layer coatings

Surface Preparation

Properties Test method Acceptance criteria Frequency

As for 3-layer coatings



PQT Production

Epoxy layer


Adhesive layer


Foam layer

Density ISO 845 to be agreed to be included First day 1/10 then 1/50Compressive strength ASTM D695 to be agreed to be included to be agreedTensile strength ASTM D638 According to ITP to be included not applicableFull layer



March 2000


DET NORSKE VERITAS

Coating Data Sheet No.3: Single or Dual Layer Fusion Bonded Epoxy Coating(2 pages)

Coating ConfigurationEpoxy layer FBE: min. 500 µm (to be agreed)

Coating MaterialsItem/Property Test method Acceptance criteria Frequency

Epoxy material

Density ISO 2811 According to product data sheet Every batch/lotParticle size According to product data sheet According to product data sheet Every batch/lotMax. moisture content According to product data sheet According to product data sheet Every batch/lotGel time According to product data sheet According to product data sheet Every batch/lotGlass transition temperature GBE/CW6 part 1, App. A According to product data sheet

(min. 5 oC above pipeline max.operating temperature)

Every batch/lot

Infrared scan by agreement by agreement by agreement

Water resistance ASTM D870,3000 hrs at 85 oC or

GBE/CW6 part 1, App. E

No blistering,swelling < 5 %Loss of hardness <10 %

According to standard

by agreement

Impact resistance GBE/CW6 part 1, App. D by agreement by agreement

Salt spray test ISO 7253, 4000 hrs orBS 3900, Part F4

No rusting, no blistering by agreement

Cathodic disbonding ASTM G8 orGBE/CW6, part 1, App. E or or other agreed procedure


Surface Preparation


PQT Production

Initial surfacecondition

Visual examination Dry and free fromcontamination (oil, grease,etc.) and surface defects

to be included Every pipe




Salt contaminationafter blast cleaning

ISO 8502-6 oragreed method

max. 20 mg NaCl/m2 to be included First 5, then 1/30both pipe ends

Surface cleanliness ISO 8501-1 A/B ≥ Sa 2 ½. to be included Every pipe

Surface cleanliness ISO 8502-2 Rating max. 2 to be included First 5, then 1/30both pipe ends

Surface roughness ISO 8503-4 RY5 min. 40 µm; max 100 µm

to be included First 5, then 1/30both pipe ends

Final surface condition Visual examination Free from surface defects to be included Every pipe

Pipe temperature priorto chemical treatment(if specified in MPS)



March 2000


DET NORSKE VERITAS

Coating Data Sheet No.3: Single or Dual Layer Fusion Bonded Epoxy Coating(2 pages)



PQT Production

Pipe temperature According to ITP According to ITP to be included Continuous monitoring

Thickness to be agreed to be included

Coating material andpipe temperatures


Pipe feed rate According to ITP According to ITP to be included Continuous monitoring

Appearance of coating Visual According to ITP to be included,100% surface area

Every pipe,100% surface area

Pipe end configuration According to ITP According to ITP to be included Every pipe,both pipe ends

Holiday detection GBE/CW6 part 1, App. Eor by agreement

no holidays to be included,100% surface area

Every pipe,100% surface area(visual/accoustic alarmfunction)

Thickness ISO 2808or by agreement

According to ITP to be included First pipe and start/lead pipe1), then one pipe every shift4 recordings (90 o) at bothpipe ends and mid section

Degree of cure FBE: differential thermalanalysis according toGBE/CW6or by agreement

FBE: ∆TG = max 2 oC to be included First pipe, start/lead pipe1)

then one pipe every shift(to be performed byallowing application tolimited area of masked pipeend)

Adhesion ISO 2409 orISO 4624 orDIN 30671or by agreement

Classification: 0 (ISO2409)min. 34 MPa (ISO 4624)no detachment (DIN30671)

to be included By agreement(to be performed byallowing application tolimited area of masked pipeend, if applicable)

Impact resistance GBE/CW6 part 1, App. D to be agreed to be included not applicable

Hardness ISO 2815 by agreement by agreement by agreement

Porosity CAN/CSA-Z245.20 by agreement by agreement by agreement

Cathodic disbonding ASTM G8 orGBE/CW6, part 1, App. Eor or other agreed procedure


Residual magnetism by agreement by agreement by agreement by agreement

1) “start/lead pipe” refers to first pipe after interrupted coating


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.4: Asphalt Enamel (or “Bitumen”) Coating (2 pages)

Coating ConfigurationPrimer Dry Film Thickness: min. 15 µm (20 ±5 µm)

Type: BS 4147, Type BAsphalt Enamel Thickness: 4-6 mm

Type: BS 4147, Type 2 Grade bInner wrapping Thickness: min. 0.3 mm

Type: Non woven fibre tissue consisting of uniformly porous mat of glass;Outer wrapping Thickness: min. 0.6 mm

Type: Glass fibre, e.g. regular weaving of continuous glass filaments in the wrap and of glassfilament or of single or double staple glass fibres in the wool, with small amounts of binder

Coating Materials


Primer material

Volatile matter BS 4147Appendix A According to BS 4147 Table 3 Every batch/lotViscosity BS 3900 Part A6 or ISO 2431 According to BS 4147 Table 3 Every batch/lotFiller materialFiller fineness BS 410 > 99 % passing 250 µm sieve

> 90 % passing 250 µm sieveEvery batch/lot

Asphalt enamel material

Filler content BS 4147 Appendix B According to BS 4147 Table 6 Every batch/lotDensity BS 4147 Appendix C According to BS 4147 Table 6 Every batch/lotSoftening point BS 2000, Part 49 According to BS 4147 Table 6 Every batch/lotPenetration BS 4147 Appendix D According to BS 4147 Table 6 Every batch/lot, twice per shiftSag test BS 4147 Appendix E According to BS 4147 Table 7 First batch/lot, then every 10th

Impact test BS 4147 Appendix G According to BS 4147 Table 7 First batch/lot, then every 10th

Bend test BS 4147 Appendix F According to BS 4147 Table 7 First batch/lot, then every 10th

Peel test BS 4147 Appendix H According to BS4 147 Table 7 First batch/lot, then every 10th

Inner wrapping material

Hydrolytic class DIN 12111 or equivalent min. Class 3 Every batch/lotWeight According to ITP min. 42 g/m2 Every batch/lotBinder content According to ITP 10-18% of total weight Every batch/lotThickness According to ITP min. 0.3 mm Every batch/lotTensile strength According to ITP Longitudinal: min. 100 N / 5 cm

stripLateral: min 25 N / 5 cm strip

Every batch/lot

Outer wrapping material

Hydrolytic class Same as for inner wrapping Every batch/lotWeight According to ITP min. 460 g/m2 Every batch/lotGlass content According to ITP min. 170 g/m² Every batch/lotThickness According to ITP min. 0.6 mm Every batch/lotTensile strength According to ITP Longitudinal and lateral:

min 800 N/ 5 cm stripEvery batch/lot


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.4: Asphalt Enamel (or “Bitumen”) Coating (2 pages)

Surface Preparation

FrequencyProperties Test method Acceptance criteria

PQT Production

Initial surface condition Visual examination Free from surfacecontamination,temporary corrosionprotection and defects

to be included Every pipe,100% surface area




Salt contamination afterblast cleaning

ISO 8502-6 max. 30 mg NaCl/m2 to be included One per shift, both ends

Surface cleanliness ISO 8501-1 A/B ≥ Sa 2 ½. to be included Every pipe100% surface area

Roughness ISO 8503-2 Grade Medium G to be included One per shift, both endsFinal surface condition Visual examination Free from surface

defectsto be included Every pipe

100% surface area



PQT Production

Primer layer

Application temperature According to ITP According to ITP to be included Every pipeCoating layer thickness According to ITP According to ITP to be included First 10 pipes then every 10th

pipe, 3x4 locations (90 o apart)Full layer

Time duration frompriming

According to ITP to be included Every pipe

Enamel temperature According to ITP According to ITP to be included Continuous monitoring

Pipe temperature According to ITP According to ITP to be included Every pipe

Wrap and enamelconfiguration

According to ITP According to ITP to be included According to ITP

Appearance of finished coating

Visual According to ITP to be included Every pipe,100% surface area

Total thickness According to ITP 5.0 mm minimum9.0 mm maximum

to be included First 10 pipes then every 10th

pipe,3x4 locations (90 o apart)

Holiday detection NACE RP0274min 15 kVRate: 150-250 mm/s

No defects acceptable to be included Every pipe,100% surface area

Adhesion(Tapping/sounding test)

Tapping by woodenstick(According to ITP)

According to ITP to be included First 10 pipes then every 10th

pipe, “100%” surface area.

Adhesion(Peeling test)

Cutting by knifethrough coating (e.g.30x100 mm strip) andpeeling by force(According to ITP)

Coating shall bedifficult to remove,causing cohesive failureof the coating.

to be included First 5 pipes (one pipe end),then first pipe per shift

Compactness test Examination of stripremoved from coatingfor homogenity andthickness of individuallayers (acc. to ITP)

According to ITP to be included First 5 pipes (one pipe end),then first pipe per shift

Pipe end configuration According to ITP According to ITP to be included Every pipe, both pipe ends


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.5: Coal Tar Enamel Coating (2 pages)

Coating ConfigurationPrimer Dry Film Thickness: min. 15 µm (20 ±5 µm)

Type: BS 4164, grade BCoal Tar Enamel Thickness: 4-6 mm

Type: BS 4164, grade 120/5Inner wrapping Thickness: min. 0.3 mm

Type: 1 wrap of glass mat, non-woven glass fibreOuter wrapping Thickness: min. 0.6 mm (when impregnated)

Type: 1 wrap of saturated woven glass fibre

Coating Materials


Primer material

Viscosity BS 3900 Part A6 orISO 2431

According to BS 4164 Table 1 Every batch/lot

Flash point BS 3442 According to BS 4164 Table 1 Every batch/lotVolatile matter BS 4164 Appendix A According to BS 4164 Table 1 Every batch/lotFiller material

Filler fineness BS 410 > 99 % passing 250 µm sieve> 90 % passing 250 µm sieve

Every batch/lot

Coal tar enamel material

Filler content BS 4164 Appendix B According to BS 4164 Table 2 Every batch/lot, once per shiftDensity BS 4164 Appendix C According to BS 4164 Table 2 Every batch/lot, once per shiftSoftening point BS 4164 Appendix D According to BS 4164 Table 2 Every batch/lot, once per shiftPenetration BS 4164 Appendix E According to BS 4164 Table 2 Every batch/lot, once per shiftViscosity BS 4164 Appendix F According to BS 4164 Table 2 Every batch/lot, once per shiftSag test According to BS 4164,

Appendix GAccording to BS 4164 Table 3 First batch/lot, then every 10th

Impact test According to BS 4164,Appendix K

According to BS 4164 Table 3 First batch/lot, then every 10th

Bend test According to BS 4164,Appendix J


Low temperature test forcracking and disbonding

According to BS 4164,Appendix H


Peel test According to BS 4164,Appendix L


Cathodic disbonding test According to BS 4164,Appendix M

According to BS 4164 Table 3 by agrement

Inner wrapping material

Hydrolytic Class DIN 12.111 or equivalent Class 3 or better Every batch/lotWeight According to ITP min. 42 g/m2 Every batch/lotBinder content According to ITP 10-18% Every batch/lotThickness According to ITP According to ITP Every batch/lotTensile strength According to ITP min. 306 N/150 mm wide strip

measured in the longitudinal directionEvery batch/lot

Outer wrapping material

Hydrolytic class DIN 12.111 or equivalent Class 3 or better Every batch/lotWeight According to ITP min. 460 g/m2 Every batch/lotBinder content According to ITP According to ITP Every batch/lotTensile strength According to ITP min. 535 N/150 mm wide strip Every batch/lot


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.5: Coal Tar Enamel Coating (2 pages)

Surface preparationFrequency

Item/Property Test method Acceptance criteriaPQT Production

Initial surface condition Visual examination Free from surfacecontamination, temporarycorrosion protection anddefects

to be included Every pipe100% surface area



to be included Minimum once perhour

Salt contamination afterblast cleaning

ISO 8502-6 max. 30 mg NaCl/m2 to be included One per shift, bothends

Surface cleanliness ISO 8501-1 A/B ≥ Sa 2 ½. to be included Every pipe100% surface area

Roughness ISO 8503-2 Grade Medium G to be included One per shift, bothends

Final surface condition Visual examination Free from surface defects to be included Every pipe100% surface area

Coating Pre-Production Qualification Testing (PQT) and Production ControlFrequency

Item/Property Test method Acceptance criteriaPQT Production

Primer layerApplication temperature According to ITP According to ITP to be included Every pipeCoating layer thickness According to ITP According to ITP to be included 10 first pipe, then every

10th pipe,3x4 locations (90 o apart)

Full layerTime duration frompriming

According to ITP to be included Every pipe

Enamel temperature According to ITP According to ITP to be included Continuous monitoring

Pipe temperature According to ITP According to ITP to be included Every pipe

Wrap and enamelconfiguration

According to ITP According to ITP to be included According to ITP

Appearance offinished coating

Visual According to ITP to be included Every pipe,100% surface area

Total thickness According to ITP 5.0 mm minimum9.0 mm maximum

to be included First 10 pipes then every10th pipe,3x4 locations (90 o apart)

Holiday detection NACE RP0274min 15 kVRate: 150-250 mm/s

No defects acceptable to be included Every pipe,100% surface area

Adhesion(Tapping/sounding test)

Tapping by woodenstick(According to ITP)

According to ITP to be included First 10 pipes then every10th pipe, “100%” surfacearea.

Adhesion(Peeling test)

Cutting by knifethrough coating (e.g.30x100 mm strip) andpeeling by force(according to ITP)

Coating shall be difficult toremove, causing cohesivefailure of the coating. Cleanpeeling from primer or thepipe surface is not acceptable

to be included First 5 pipes (one pipeend), then first per shift

Compactness test Examination of stripremoved from coatingfor homogenity andthickness of individuallayers (acc. to ITP)

According to ITP to be included First 5 pipes (one pipeend), then first per shift


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.6: Polychloroprene (or “Vulcanised Rubber”) Coating(2 pages)

Coating ConfigurationPrimer Type and thickness according to ITPPolychloreprene Thickness to be agreed

Coating Materials


Primer material

According to ITP According to ITP According to ITP Every batch/lot

Polychloroprene material

Rheometer curve According to ITP According to ITP Every batch/lotHardness ASTM D2240 56-68 Shore A Every batch/lotDensity BS 903 Part A1 1450-1650 kg/m3 Every batch/lotTensile strength ISO 37 min. 15 MPa Every batch/lotElongation ISO 37 min.. 350% Every batch/lotCompression set ISO 815 max.. 20% at 60 oC Every batch/lotOzone resistance ASTM D1149 by agreement by agreementSeawater absorption BS 903 Part A16 by agreement by agreementAbrasion resistance DIN 53516 by agreement by agreementTear strength ISO 34 min. 30N/mm by agreementThermal conductivity by agreement by agreement by agreementAccelerated ageing ISO 188 by agreement by agreementPenetration ASTM G17 by agreement by agreement

Surface preparation

FrequencyProperties Test method Acceptance criteria

PQT Production

Initial surface condition VisualExamination

Free from surfacecontamination,temporary corrosionprotection and defects

to be included Every pipe,100% surface area

Pipe temperature and relativehumidity



Salt contamination after blastcleaning

ISO 8502-6 max. 20 mg NaCl/m2 to be included One per shift

Surface cleanliness ISO 8501-1 A/B ≥ Sa 2 ½. to be included Every pipe

Roughness ISO 8503-2 Grade Medium G to be included One per shiftFinal surface condition Visual examination Free from surface

defectsto be included Every pipe

100% surface area


March 2000


DET NORSKE VERITAS

Coating Data Sheet No.6: Polychloroprene (or “Vulcanised Rubber”) Coating(2 pages)



PQT Production

Polychloroprene layerVulcanising temperature andpressure

According to ITP According to ITP to be included Every pipe

Appearance Visual According to ITP to be included Every pipe,100% surface area

Coating layer thickness According to ITP According to ITP to be included Every pipe,3x4 locations (90 o apart)

Holiday detection BS 6374 According to ITP to be included Every pipe,100% surface area

Adhesion BS 6374 According to ITP to be included Every pipe (at cutback)Hardness ASTM D2240 According to ITP to be included Every pipePipe end configuration According to ITP According to ITP to be included Every pipe,

both pipe endsBending resistance by agreement by agreement by agreement not applicableCathodic disbonding by agreement by agreement by agreement not applicable

Coating Corrosion Rp f106

Documents

deutsche industrie

det norske

product data

full layertime

enamel configuration

causing cohesive

field joint

remaining