GRP PIPING MATERIALS

NORSOK STANDARD

COMMON REQUIREMENTS

GRP PIPING MATERIALS

M-CR-621 Rev. 1, December 1994

GRP Piping Materials

M-CR-621 Rev. 1, December 1994

CONTENTS

1 FOREWORD ........................................................................................................................... 2 2 SCOPE...................................................................................................................................... 2 3 NORMATIVE REFERENCES .............................................................................................. 2 4 DEFINITIONS AND ABBREVIATIONS............................................................................. 3 5 TECHNICAL REQUIREMENTS ......................................................................................... 3 6 QUALIFICATION OF MANUFACTURERS...................................................................... 4 7 DESIGN REQUIREMENTS .................................................................................................. 6 8 FABRICATION AND INSTALLATION ............................................................................. 6 9 OPERATION ........................................................................................................................... 7

_______________________________________________________________________________ NORSOK Standard 1 of 7

GRP Piping Materials

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M-CR-621 Rev. 1, December 1994

FOREWORD This Standard has been developed by the NORSOK Standardisation Work Group for the widest possible national and international application. The Standard is based on the UKOOA document "Specifications and Recommended Practice for the Use of Glass Fibre Reinforced Plastic Piping Offshore" with amendments given. The UKOOA document is divided into five parts; 1) Philosophy and Scope, 2) Components and Manufacture, 3) System Design, 4) Fabrication and Installation and 5) Operation. Each part of the UKOOA document, with the exception of part 1, follow the individual life cycle of a GRP pipe system. Each part may be considered as separate documents, with part 1 giving an introduction and providing references and definitions applicable to the other four parts. Work has been initiated in order to transfer the NORSOK/UKOOA documents into an ISO standard. This NORSOK Standard will apply until such a standard has been established.

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SCOPE The Standard defines the requirements for qualification of manufacturer, design, manufacturing, fabrication and installation/operation of GRP piping systems on offshore installations.

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NORMATIVE REFERENCES UKOOA document Specifications and Recommended Practice for the Use of Glass Fibre Reinforced Plastic Piping Offshore, 1994. ASTM D 3681

Standard test method for chemical resistance of thermosetting resin pipes in a deflected condition.

ASTM D 4024

Specification for Reinforced Thermosetting Resin (RTR) Flanges.

BS 5480

Specification for Glass Fibre Reinforced (GRP) pipes, joints and fittings for use for water supply and sewerage.

DIN 16966

Glass fibre reinforced polyester resin (UP-GF) pipe fittings and joint assemblies.

_______________________________________________________________________________ NORSOK Standard 2 of 7

GRP Piping Materials

ISO 4901

Reinforced plastics based on unsaturated polyester resins Determination of residual styrene monomer content.

KRV A 984/82-02

Instructions for design and installation of piping made of glassfibre reinforced thermosetting resins, with and without liner.

OLF document

Installasjon av komposittrør offshore - Godkjenning av montører og installasjonsledere (Approval of Pipe Fitters and Supervisors), OLF - 1994 (DRAFT).

OLF document

Installasjon av komposittrør offshore - Godkjenning av inspektører (Approval of Inspectors), OLF - 1994 (DRAFT).

NORSOK M-CR-630

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M-CR-621 Rev. 1, December 1994

Material Data Sheets for Piping

DEFINITIONS AND ABBREVIATIONS Add following abbreviations to Section 5, Part 1 of the UKOOA document: DnV GRE GRVE GRUP KRV OLF TI UKOOA

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Det Norske Veritas Glass reinforced plastic made with epoxy resin. Glass reinforced plastic made with vinylester resin. Glass reinforced plastic made with unsaturated polyester resin. Kunststoff Rohrverband (53 Bonn, Dyroffstrasse 2, Germany) Oljeindustriens Landsforening (Norwegian Oil Industry Association) (P.O.Box 547, N-4001 Stavanger, Norway) Teknologisk Institutt, Oslo, Norway United Kingdom Offshore Operators Association.(UK`s counterpart to OLF) (3 Hans Crescent, London SW IX 0LN, England).

TECHNICAL REQUIREMENTS Typical acceptable applications of GRP piping include; service water, process water, cooling medium, potable water, sewage/grey water (non hazardous waste), non hazardous drains, non hazardous vents, chemicals, firewater ringmain, firewater dry deluge, firewater wet deluge, produced water and ballast water. The amendments given in the following sections give additional requirements or impose limitations compared to the UKOOA "Specifications and Recommended Practice for the Use of Glass Fibre Reinforced Plastic Piping Offshore". Unamended paragraphs in the UKOOA document apply in full.

_______________________________________________________________________________ NORSOK Standard 3 of 7

GRP Piping Materials

M-CR-621 Rev. 1, December 1994

Amendments to part 1; "Philosophy and Scope" in UKOOA document Section 1 of Part 1 in UKOOA`s document is only for information. Section 2.2 Materials Delete last sentence, "Thermoplastic liners are also excluded from this Document Suite" in first section and add following sections: Preferred resins are bisphenol A epoxies with aromatic or cycloaliphatic curing agent and vinylester. Suitable thermoplastic liner should be used in combination with vinylester and C glass or ECR glass for transportation of concentrated hypochlorite and sulphuric acid. For transporting other agressive fluids, the C glass or ECR glass combined with resin rich internal barrier should be used. The reinforcement used in the resin rich barrier shall be C glass or synthetic veil. Thermoplastic lined pipes shall be qualified, manufactured, designed and installed according to DIN 16966 and KRV A 984/82-02. Section 6, Bibliography. Add following reference: DnV

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Det norske Veritas Rules for Classification of Ships and Mobile Offshore Units.

QUALIFICATION OF MANUFACTURERS Amendment to part 2:" Components and Manufacture" in UKOOA document The manufacturer shall satisfy the requirements given in Material Data Sheet MDS-P01 in NORSOK Standard M-CR-630.

Section 2.1.9 Adhesive/resin for bonded/laminated joints Add new section 2.1.9. The adhesive used for bonded joints or resin used for laminated joints shall be qualified according to section 2.1.2 and 2.1.3. The adhesive/resin shall have suitable properties for field assembly and fullfilling the following requirements: -The adhesive/resin shall have a suitable viscosity for application at room temperature. The viscosity shall not be above 0.4 kPas at 23°C with a shear rate of 10 rotations per second (absolute viscosity data). _______________________________________________________________________________ NORSOK Standard 4 of 7

GRP Piping Materials

M-CR-621 Rev. 1, December 1994

-The fracture elongation of the cured adhesive/resin in joints shall not be less than that of the resin used in the piping. -The glass transition temperature (TG) or the residual heat of reaction of the cured adhesive/resin shall be determined by DSC according to Annex C, by measurement of samples taken from joints of components used in qualification testing. -Alternatively, for polyester and vinylester based products, the residual styrene monomer content for joints in components used in qualification testing may be determined. The measurement shall be performed according to ISO 4901. Section 2.1.10 Component Data for Fabrication, Prefabrication and Installation Quality Control Baselines. Add new section 2.1.10: The manufacturer shall generate from the qualification programme baseline values including acceptance criteria for the fabrication and installation quality control programme. This includes measurement of degree of cure and glass content. The degree of cure shall be determined by DSC in accordance with Annex C or by residual styrene content measurement in accordance with ISO 4901 for the adhesive used in bonded joints and the resin used in laminated joints. Reference to new section 2.1.9. The percentage of fibreglass reinforcement in laminated joint shall be determined in accordance with ASTM D 2584. Three samples shall be taken from three locations situated 120° apart in the same joint cross section. Section 2.4 Component Properties for System Design Delete the two words “Where applicable” in the first sentence. ANNEX C

Test Method for Determination of Degree of Cure by Differential Scanning Calorimetry (DSC)

C.5.3 Delete sentence and replace with: Obtain the TG1 (midpoint of the inflection in the DSC curve) and/or the residual heat of reaction from the first scan and second scan. (Sample not powdered). C.6.5 Delete sentence and replace with: _______________________________________________________________________________ NORSOK Standard 5 of 7

GRP Piping Materials

M-CR-621 Rev. 1, December 1994

Record of glass transition temperature (inflection value) as TG1 and /or residual heat of reaction for both the first and second scan.

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DESIGN REQUIREMENTS Amendment to part 3: "System Design" in UKOOA document Section 8.1.4 Flanged Joints Replace last sentence with following sentence: Allowable bolt torques and flange mis-alignment shall be defined by Manufacturer.

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FABRICATION AND INSTALLATION Amendment to part 4: "Fabrication and Installation" in UKOOA document Section 4.4. Jointing Add the following before last paragraph: The adhesive/resin used shall be according to manufacturer recommendation satisfying the requirements given in clause 6, section 2.1.9 and 2.1.10 in this document. The glass transition temperature (TG) or the residual heat of reaction of the cured adhesive/resin measured according to Annex C in part 2 of the UKOOA document shall not deviate more than the following compared to qualified values: • •

TG max. 5°C lower Residual heat of reaction max. 10% higher

Alternatively, for polyester and vinylester based products, the residual styrene monomer content for joints in components used in qualification testing may be determined. The measurement shall be performed according to ISO 4901. The residual styrene content shall be maximum 10% above the level measured during component qualification, but not above 2% total content. Section 4.6 Quality Programme for Installation Add following sentence to the list in the third paragraph starting with "Quality control shall be based on the implementation of:" -curing temperature and time shall be regularly recorded for adhesive bonded joints and laminated joints;

_______________________________________________________________________________ NORSOK Standard 6 of 7

GRP Piping Materials

M-CR-621 Rev. 1, December 1994

-TG or residual heat of reaction shall be measured by DSC (Annex C in Part 2) for 10% of the joints of samples taken from the adhesive in bonded joints or the resin in laminated joints. Section 5.0 Installer Certification Add following sentences: Pipe fitters, supervisors and inspectors shall be exclusively qualified and certified for specific joint type(s). As a minimum, it is required that the pipe fitters, supervisors and inspectors are certified according to OLF documents "Godkjenning av montører og installasjonsledere". (“Approval of Fitters and Supervisors”) and “Godkjenning av inspektører” (“Approval of Inspectors”) (OLF - 1994 /DRAFT).

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OPERATION Amendment to part 5: "Operation" in UKOOA document Section 4.3.2 Laminated Joint. Add following paragraphs after the third paragraph: The resin used shall be according to manufacturer recommendation satisfying the requirements given in clause 6, section 2.1.9 and 2.1.10 in this document. The glass transition temperature (TG) or the residual heat of reaction of the cured adhesive/resin measured according to Annex C in part 2 of the UKOOA document shall not deviate more than the following compared to qualified values, • •

TG max. 5°C lower Residual heat of reaction max.10% higher.

Alternatively, for polyester and vinylester based products, the residual styrene monomer content for joints in components used in qualification testing may be determined. The measurement shall be performed according to ISO 4901. The residual styrene content shall be maximum 10% above the level measured during component qualification, but not above 2% total content. Section 6.0 Fitter and inspector certification Add following sentences: Pipe fitters, supervisors and inspectors shall be exclusively qualified and certified for specific joints type(s). As a minimum, it is required that the pipe fitters, supervisors and inspectors are certified according to OLF's document "Godkjenning av montører og installasjonsledere". (“Approval of Fitters and Supervisors”) and “Godkjenning av inspektører” (“Approval of Inspectors”) (OLF - 1994 /DRAFT).. _______________________________________________________________________________ NORSOK Standard 7 of 7