NORSOK STANDARD - ccc.no

1 NORSOK STANDARDCOMMON REQUIREMENTSPIPING FABRICATION, INSTALLATION, FLUSHINGAND TESTINGL-CR-004 Rev 1, January 1996 Please note that whilst every effort has been made to ensure the accuracy of the NORSOK standardsneither OLF nor TBL or any of their members will assume liability for any use fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard1 of 27 CONTENTS1 FOREWORDERROR! BOOKMARK NOT SCOPE33 NORMATIVE REFERENCES34 DEFINITIONS AND Abbreviations45 Colour marking of Material storage, handling, recieval and identification control46 FABRICATION OF General Welding and Butt welds for orifice Screwed Dimensional tolerances for pre-fabricated piping Branch connections and Pipe coupling87 INSTALLATION OF Pipework Flanged Valve and equipment flange Pipe Global tolerances.

2 Installation108 Hydro Pressurised air Pneumatic flushing119 PRESSURE Test Test Hydrostatic Pneumatic After completion of Verification of cleanliness1410 CHEMICAL CLEANING1411 HOT OIL Marking15 Piping fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard2 of Documentation1512 SYSTEM COLOUR CODING OF Types of Marker Material of Positioning of Fluid description/colour code Colour coding A ALTERNATIVE TEST ALTERNATIVE TESTING ALTERNATIVE TEST MATRIX20 ANNEX B REQUIREMENTS FOR INTERNAL TREATMENT OF PIPING AFTERPREFAB AND INSTALLATION BEFORE COMMISSIONING (TABLE 1)211 ERRATA.

3 CORRECTED TYPING ERROR IN ANNEX (APRIL1998)Piping fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard3 of 271 FOREWORDNORSOK (The competitive standing of the Norwegian offshore sector) is the industry initiative toadd value, reduce cost and lead time and remove unnecessary activities in offshore fielddevelopments and NORSOK standards are developed by the Norwegian petroleum industry as a part of theNORSOK initiative and are jointly issued by OLF (The Norwegian Oil Industry Association) andTBL (The Federation of Norwegian Engineering Industries). NORSOK standards are administeredby NTS (Norwegian Technology standards Institution).

4 The purpose of this industry STANDARD is to replace the individual oil company specifications for usein existing and future petroleum industry developments, subject to the individual company's reviewand NORSOK standards make extensive references to international standards . Where relevant, thecontents of this STANDARD will be used to provide input to the international standardisation to implementation into international standards , this NORSOK STANDARD will be annexes are SCOPEThis STANDARD covers the basis for fabrication, installation, flushing, pressure testing, chemicalcleaning, hot oil flushing and system colour coding of process, drilling and utility piping foroffshore oil and/or gas production STANDARD does not cover the following: All instrument control piping downstream of first piping block valve.

5 Sub-sea pipework and risers. Flexible hoses. Sanitary piping systems within living quarters and other domestic areas (H-CR-002). GRP NORMATIVE REFERENCESThe fabrication, installation, flushing, pressure testing, chemical cleaning, hot oil flushing andsystem colour coding shall be in accordance with all applicable sections of the latest edition of theregulations, codes, standards listed below:ASME plant and petroleum refinery pipingASME threads, general purposeDIN 2505 Flanged joint calculationNorsok Z-DP-002 Coding systemNorsok L-CR-001 Piping and valvesNorsok M-CR-601 Welding and inspection of pipingNS 813 Piping systems.

6 Identification colours for the fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard4 of 27NS 4054 Colour for 4406 Hydraulic fluid power-fluids-method for coding level of contaminationby solid particlesISO 9095 Steel tubes - Continuous character marking and colour coding formaterial identification4 DEFINITIONS AND DefinitionsNormative referencesShall mean normative in the application of NORSOK referencesShall mean informative in the application of NORSOK is an absolute requirement which shall be followed strictly in orderto conform with the is a recommendation. Alternative solutions having the samefunctionality and quality are indicates a course of action that is permissible within the limits ofthe STANDARD (a permission).

7 CanCan-requirements are conditional and indicates a possibility open to the user of the AbbreviationsABSA bsoluteCTFCut To FitHVWFHigh Velocity Water FlushingNSNorwegian StandardASMEA merican Society of Mechanical EngineersPVCP olyester Vinyl ChloridIDInner DiameterPASP ressurised Air Shock BlowingP&IDPiping and Instrument DiagramNDENon Destructive ExaminationHVACH eating, Ventilation and Air-ConditioningISOI nternational Organisation for StandardisationRAL bersichtkarte. bersicht ber die farben des farbregisters RAL 840 HRRTJRing Type JointGRPG lassfiber Reinforced Plastic5 Colour marking of materialsIf colour marking shall be implemented, ISO 9095 shall be Material storage, handling, recieval and identification controlProcedures for off-loading, storage, recieval, control, traceability and inspection of piping materialsupplied for fabrication and installation shall be worked fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard5 of 276 FABRICATION OF General requirementsPrefabricated pipe spools shall be cleaned, painted (if required)

8 And preserved prior to Welding and NDEAll welding and NDE shall be in accordance with of in-line valves and equipment that could be damaged due to heat transfer shall beremoved prior to welding and/or heat Butt welds for orifice runsWhen the design of an orifice run necessitates welds, these shall be ground smooth and flush withthe inside of the pipe. Pipe-tap connections where required, shall be drilled through the pipe walland be smooth Screwed pipeworkUnless otherwise stated on approved drawing or specifications, pipe threads shall conform to threading shall be carried-out after bending, forging or heat treatment but where this is notpossible, suitable thread protection must be Dimensional tolerances for pre-fabricated piping assembliesThe tolerances on linear dimensions (intermediate or overall) is illustrated on figures 1 and 2.

9 Thesetolerances are not tolerances across the face of flanges, weld end preparation and rotation of flanges shallbe as stated in figures 1 and tolerances on weld end preparations than stated in figures 1 and 2, may be specified in therelevant welding specification for the material in question, and shown on the fabricationisometric(s).When closer tolerances other than those given above are required, these shall be as specified on theisometric drawing in fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard6 of 27 LLLL3 mm per 1 mMax 6 mmTLLLLL (m)Tolerances (mm) LT 6 5 >6 10 1.

10 Tolerances for prefabricated piping assembliesPiping fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard7 of 27 LLATL2dL1L2dL1 KTHL (m)Tolerances (mm)Tolerances (mm)LAT2" d 10"12" d 20"d >20" 3 5 5> 3 5 5H 3 3 3d=nominal mmX"X"Figure 2: Tolerances for prefabricated piping assembliesNotes:1. Before reworking any spools contact engineering department in order to check For spools CTF dimensions the overall length to be approximately 50mm Bolt holes on flanges shall straddle the horizontal or vertical lines or plant north/south centrelines when orientation is not given on fabrication, installation, flushing and testingL-CR-004 Rev 1, January 1996 NORSOK standard8 of Branch connections and outletsAll welded branch connections shall be jointed to the header with full penetration connections shall be set-on type.