SIST EN 14870-2:2005
(Main)Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 2: Fittings (ISO 15590-2:2003 modified)
Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 2: Fittings (ISO 15590-2:2003 modified)
This part of prEN 14870 specifies the technical delivery conditions for unalloyed or low alloy steel seamless and welded pipeline fittings for use in pipeline transportation systems for the petroleum and natural gas industries as defined in ISO 13623.
This part of prEN 14870 is applicable to welding-end fittings such as elbows, caps, tees, single or multiple extruded headers, reducers, and transition sections made from seamless and welded pipe of unalloyed or low-alloy steels.
This part of prEN 14870 specifies three classes of fitting corresponding to increasing quality requirements in accordance with the technical delivery conditions of ISO 3183 for pipe as indicated in Table 1.
Table 1 - Fitting class and corresponding pipe standard
Fitting class Corresponding pipe standard
Class A ISO 3183-1
Class B ISO 3183-2
Class C ISO 3183-3
This part of prEN 14870 is not applicable to the selection of the fitting class.
This part of prEN 14870 is not applicable to the materials for, or the attachment of, factory-welded extensions.
On-land supply systems used by the gas supply industry are excluded from the scope of this standard.
Erdöl- und Erdgasindustrie - Induktivbiegungen, Formstücke und Flansche für Transportleitungssysteme -Teil 2: Fittings (ISO 15590-2:2003 modifiziert)
Industries du pétrole et du gaz naturel - Coudes d'induction, raccords et brides pour systemes de transport par conduites - Partie 2 : Raccords (ISO 15590-2:2003 modifiée)
Industrija za predelavo nafte in zemeljskega plina - Z indukcijo upognjena cevna kolena, fitingi in prirobnice za transportne cevovodne sisteme - 2. del: Fitingi (ISO 15590-2:2003, spremenjen)
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrija za predelavo nafte in zemeljskega plina - Z indukcijo upognjena cevna kolena, fitingi in prirobnice za transportne cevovodne sisteme - 2. del: Fitingi (ISO 15590-2:2003, spremenjen)Erdöl- und Erdgasindustrie - Induktivbiegungen, Formstücke und Flansche für Transportleitungssysteme -Teil 2: Fittings (ISO 15590-2:2003 modifiziert)Industries du pétrole et du gaz naturel - Coudes d'induction, raccords et brides pour systemes de transport par conduites - Partie 2 : Raccords (ISO 15590-2:2003 modifiée)Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 2: Fittings (ISO 15590-2:2003 modified)83.140.30Cevi, fitingi in ventili iz polimernih materialovPlastics pipes, fittings and valves75.200Petroleum products and natural gas handling equipmentICS:Ta slovenski standard je istoveten z:EN 14870-2:2004SIST EN 14870-2:2005en01-april-2005SIST EN 14870-2:2005SLOVENSKI
STANDARD
SIST EN 14870-2:2005
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14870-2December 2004ICS 23.040.40; 75.200English versionPetroleum and natural gas industries - Induction bends, fittingsand flanges for pipeline transportation systems - Part 2: Fittings(ISO 15590-2:2003 modified)Industries du pétrole et du gaz naturel - Coudes d'induction,raccords et brides pour systèmes de transport parconduites - Partie 2 : Raccords (ISO 15590-2:2003modifiée)Erdöl- und Erdgasindustrie - Im Induktionsverfahrenhergestellte Rohrbögen, Fittings und Flansche fürRohrleitungstransportsysteme -Teil 2: Fittings (ISO 15590-2:2003 modifiziert)This European Standard was approved by CEN on 30 September 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14870-2:2004: ESIST EN 14870-2:2005
EN 14870-2:2004 (E) 2 Contents page Explanatory Note.3 Foreword.4 Introduction.5 1 Scope.6 2 Normative references.6 3 Terms and definitions.8 4 Symbols and abbreviated terms.8 5 Designation.10 6 Pressure rating and design.10 6.1 General.10 6.2 Tees and headers.10 6.3 Extruded outlet headers.10 7 Information to be supplied by the purchaser.11 7.1 Principal information.11 7.2 Supplementary information.11 8 Manufacturing.12 8.1 Manufacturing procedure specification.12 8.2 Starting material.13 8.3 Fitting manufacture.13 9 Testing and inspection.15 9.1 General requirements.15 9.2 Extent of testing and inspection.15 9.3 Chemical composition.17 9.4 Mechanical testing.17 9.5 Non-destructive testing.23 9.6 Dimensions.25 9.7 Gauging.25 9.8 Hydrostatic testing.25 10 Inspection document.25 11 Marking.25 Annex A (normative)
Design calculations.27 Annex B (normative)
Proof test.30 Annex ZA (normative)
Normative references to international publications with their corresponding European publications.33 Bibliography.34 SIST EN 14870-2:2005
EN 14870-2:2004 (E) 3 Explanatory Note ISO 15590-2:2003, developed within ISO/TC 67 SC 2, has been taken over as a European Standard EN 14870-2 (ISO 15590-2:2003 modified). The scope of ISO/TC 67/SC 2 is pipeline transportation systems for the petroleum and natural gas industries without exclusions. However in CEN, the scopes of CEN/TC 12 and CEN/TC 234 overlapped until 1995.This scope overlap caused problems for the parallel procedure for the above-mentioned items. The conflict in scope was resolved when both the CEN/Technical Committees and the CEN/BT took the following resolution: Resolution BT 38/1995: Subject: Revised scope of CEN/TC 12 “BT endorses the conclusions of the coordination meeting between CEN/TC 12 “Materials, equipment and offshore structures for petroleum and natural gas industries” and CEN/TC 234 “Gas supply” and modifies the CEN/TC 12 scope, to read: “Standardization of the materials, equipment and offshore structures used in drilling, production, refining and the transport by pipelines of petroleum and natural gas, excluding on-land supply systems used by the gas supply industry and those aspects of offshore structures covered by IMO requirement (ISO/TC 8). The standardization is to be achieved wherever possible by the adoption of ISO Standards.” Resulting from Resolution BT 38/1995, "gas supply on land" has been excluded from the scope of ISO 15590-2:2003 for the European adoption by CEN/TC 12. Equivalence with European Standards is provided in Annex ZA. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 4 Foreword The text of ISO 15590-2:2003 has been prepared by Technical Committee ISO/TC 67 "Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries" of the International Organization for Standardization (ISO) and has been taken over as EN 14870-2:2004 by Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. This document includes a Bibliography. International Standard ISO 15590-2 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC2, Pipeline transportation systems.
EN 14870 consists of the following parts, under the general title Petroleum and natural gas industries — Induction bends, fittings and flanges for pipeline transportation systems: Part 1: Induction bends (ISO 15590-1:2001 modified) Part 2: Fittings (ISO 15590-2:2003 modified) The following part is under preparation: Part 3: Flanges
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 5 Introduction Users of this document should be aware that further or differing requirements may be needed for individual applications. This document is not intended to inhibit a manufacturer from offering, or the purchaser from accepting, alternative equipment or engineering solutions for the individual application. This can be particularly applicable where there is innovative or developing technology. Where an alternative is offered, the manufacturer should identify any variations from this document and provide details. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 6 1 Scope This document specifies the technical delivery conditions for unalloyed or low-alloy steel seamless and welded pipeline fittings for use in pipeline transportation systems for the petroleum and natural gas industries as defined in EN 14161. This document is applicable to welding-end fittings such as elbows, caps, tees, single or multiple extruded headers, reducers, and transition sections made from seamless and welded pipe of unalloyed or low-alloy steels. This document specifies three classes of fitting corresponding to increasing quality requirements in accordance with the technical delivery conditions of ISO 3183 for pipe as indicated in Table 1. Table 1 — Fitting class and corresponding pipe standard Fitting class Corresponding pipe standard Class A ISO 3183-1 Class B ISO 3183-2 Class C ISO 3183-3 This document is not applicable to the selection of the fitting class. This document is not applicable to the materials for, or the attachment of, factory-welded extensions. On-land supply systems used by the gas supply industry are excluded from the scope of this document. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels. EN 14161, Petroleum and natural gas industries - Pipeline transportation systems (ISO 13623:2000 modified). EN ISO 377:1997, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997). EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1:1984). EN ISO 6507-1, Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:1997). EN ISO 7438, Metallic materials - Bend test (ISO 7438:1985).
EN ISO 15156-2:2003, Petroleum, petrochemical and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low alloy steels, and the use of cast irons (ISO 15156-2:2003). EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004). ISO 148, Steel — Charpy impact test (V-notch). ISO 148-2, Metallic materials — Charpy pendum impact text — Part 2:Verification of test machines. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 7 ISO 148-3, Metallic materials — Charpy pendum impact test – Part 3: Preparation and characterization of Charpy V reference test pieces for verification of test machines. ISO 783, Metallic materials — Tensile testing at elevated temperature. ISO 3183-1, Petroleum and natural gas industries — Steel pipe for pipelines — Technical delivery conditions — Part 1: Pipes of requirement class A. ISO 3183-2, Petroleum and natural gas industries — Steel pipe for pipelines — Technical delivery conditions — Part 2: Pipes of requirement class B. ISO 3183-3, Petroleum and natural gas industries — Steel pipe for pipelines — Technical delivery conditions — Part 3: Pipes of requirement class C. ISO 3834-2, Quality requirements for welding — Fusion welding of metallic materials — Part 2: Comprehensive quality requirements. ISO 4885:1996, Ferrous products — Heat treatments — Vocabulary. ISO 6892, Metallic materials — Tensile testing at ambient temperature. ISO/TR 7705:1991, Guidelines for specifying Charpy V-notch impact prescriptions in steel specifications. ISO 9712, Non-destructive testing — Qualification and certification of personnel. ISO 10474, Steel and steel products — Inspection documents. ISO 11496, Seamless and welded steel tubes for pressure purposes — Ultrasonic testing of tube ends for the detection of laminar imperfections. ISO 12095, Seamless and welded steel tubes for pressure purposes — Liquid penetrant testing. ISO 12096, Submerged arc-welded steel tubes for pressure purposes — Radiographic testing of the weld seam for the detection of imperfections. ISO 13664, Seamless and welded steel tubes for pressure purposes — Magnetic particle inspection of the tube ends for the detection of laminar imperfections. ASME1) B16.9, Factory-made wrought butt welding fittings. ASME B31.8, Gas transmission and distribution piping systems. ASME IX, Boiler and pressure vessel code, Section IX — Welding and brazing procedures, welders, brazers, and welding and brazing operators. ASTM2) E 112, Standard test methods for determining average grain size. ASTM E 709, Standard guide for magnetic particle examination. MSS3) SP-75, Specification for high test wrought butt welding fittings.
1) American Society of Mechanical Engineers, 345 East 47th Street, NY 10017-2392, USA. 2) American Society for Testing and Materials, 100 Bar Harbor Drive, West Conshohocken, PA 19428-2959, USA. 3) Manufacturers Standardization Society of the Valve & Fittings Industry, 127 Park Street, N.E., Vienna, Virginia 22180, USA. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 8 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 4885:1996 and the following apply. 3.1 by agreement agreed between manufacturer and purchaser [EN 14870-1:2004] 3.2 extrados outer curved section of the elbow NOTE Adapted from EN 14870-1:2004. 3.3 heat, noun batch of steel prepared in one steel-making process NOTE Adapted from EN 14870-1:2004. 3.4 intrados inner curved section of the elbow NOTE Adapted from EN 14870-1:2004. 3.5 manufacturing procedure specification MPS document which specifies the process control parameters and the acceptance criteria to be applied for all manufacturing, inspection and testing activities performed during fitting manufacture 3.6 tangent straight section at the ends of the fitting NOTE Adapted from EN 14870-1:2004. 3.7 test unit fitting or test piece of the same designation, starting material wall thickness, heat, manufacturing procedure specification, and heat treatment condition 4 Symbols and abbreviated terms Ao original cross-sectional area of the parallel length of a tensile test specimen D outside diameter Dp specified outside diameter of matching pipe Dn minor outside diameter of a conical reducer or reducing tee at any point, n, under consideration, measured perpendicular to the longitudinal axis
E factor used to calculate ti (see A.1) SIST EN 14870-2:2005
EN 14870-2:2004 (E) 9 f factor used to calculate proof test pressure (see Table B.1) Pcm crack measurement parameter (see Table 4) p design pressure pp numerical value of the computed proof pressure Rm tensile strength Rm, red allowable tensile strength of a reducer Rt0,5 yield strength for 0,5 % total elongation Rsmys specified minimum yield strength Td, min minimum design temperature specified by the purchaser t nominal wall thickness tD wall thickness of thicker component for joints of unequal thickness (see Figure 1) ti minimum wall thickness required in the intrados tp nominal wall thickness of matching pipe tn specified wall thickness of reducers and reducing tees at diameter Dn α included angle of a conical reducer ρo radius of curvature of the external contoured portion of the outlet of a tee CE carbon equivalent (see Table 4) CTOD crack tip opening displacement DN nominal size HIC hydrogen-induced cracking MT magnetic particle testing NDT non-destructive testing PT liquid penetrant testing RT radiographic testing SMYS specified minimum yield strength SSC sulfide stress-cracking UT ultrasonic testing SIST EN 14870-2:2005
EN 14870-2:2004 (E) 10 5 Designation Designation of fittings shall take the form: EN 14870-2 YY xxx-Z, where YY is a textual description of the type of fitting, corresponding to one of the following: EL for elbow, TE for tee, CA for cap, CR for concentric reducer, ER for eccentric reducer and NR for conical reducer, preceded by the size designation (e.g. “DN 600 EL” is a DN 600 elbow); xxx is the specified minimum yield strength requirement in MPa; Z is the suffix A or B or C, to identify the fitting class for use in non-sour service, or the suffix CS to identify class C fittings for use in sour-service conditions. 6 Pressure rating and design 6.1 General The capability of the fitting to withstand internal pressure shall equal or exceed that of the matching pipe. The verification of the capability shall be made by calculation and/or proof testing. The calculations shall be made in accordance with Annex A. The proof test procedure shall be as defined in Annex B. Additional requirements on strength design verifications, such as resistance to internal pressure under special load cases in accordance with EN 14161, shall be indicated at the time of enquiry or order. The design calculations and/or results of proof testing shall be available for review at the manufacturer’s facility. If the SMYS of the fitting material is less than that of the matching pipe, the minimum thickness of the fitting end shall be increased such that the product of its thickness times its SMYS shall at least equal the product of the specified wall thickness and the SMYS of the matching pipe, in accordance with MSS SP-75. 6.2 Tees and headers Outlet branches in tees and headers manufactured from seam-welded pipe shall be positioned diametrically opposite the longitudinal weld. When this positioning is not possible, the location shall be decided by agreement. The design and welding for the attachment of guide bars of barred tees shall be decided by agreement prior to manufacture of the tee. 6.3 Extruded outlet headers Extruded outlet headers shall be designed to comply with ASME B31.8. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 11 7 Information to be supplied by the purchaser 7.1 Principal information The purchaser shall provide the following information in the order given below: a) fitting designation; b) required fitting dimensions, including: 1) nominal outside diameters; 2) minimum wall thicknesses at the welding ends; 3) radius and type of radius (e.g. long-radius); 4) the angle (for elbows); NOTE Guidance on specific dimensions to specify is given in ISO 3545-3. c) end-preparation details; d) whether the purchaser wishes to approve the MPS prior to commencement of manufacturing. 7.2 Supplementary information If applicable, the purchaser shall specify the following supplementary information: a) minimum design temperature; b) maximum design temperature; c) maximum wall thickness; d) special dimensional requirements; e) requirements for supplementary inspection and testing; f) requirements for gauging and other measurements of dimensions where different from this document; g) pipeline design standard or design factors if different from EN 14161; h) pipeline operating conditions; i) mechanical property requirements at the maximum design temperature; j) requirements for proof, burst, or hydrostatic testing; k) activities for witnessing and approval by purchaser; l) coating or painting requirements; m) marking requirements where different from this document; n) packaging and shipping instructions; o) third-party inspection organization; SIST EN 14870-2:2005
EN 14870-2:2004 (E) 12 p) ISO 10474 standard designation of inspection document required; q) requirements for format and additional content of the inspection document; r) whether testing of welding procedures, welders, or welding operators specific to the order is required; s) whether approval of the MPS is to be by review of previous production data or by testing; t) PWHT (see 9.1); u) HIC testing (see 9.4.7); v) SCC testing (see 9.4.8). 8 Manufacturing 8.1 Manufacturing procedure specification Fittings shall be manufactured in accordance with a documented MPS. If specified by the purchaser, manufacturing shall not proceed until the MPS has been accepted by the purchaser. The MPS shall specify the following items: a) for the starting material: 1) name of manufacturer; 2) steel-making process; 3) steel grade; 4) product form and dimensions; 5) chemical composition, including that of the weld seam; 6) welding procedure specification; b) for fitting manufacture: 1) forming procedure; 2) welding procedure specification and approval record; 3) heat treatment procedure including thermal cycles; 4) machining requirements; 5) inspection and test requirements; 6) traceability; c) additional requirements such as end preparation, coating, and marking. An approval of the MPS may be required, either by review of the manufacturer’s previous production data or by performance of the mandatory tests listed in Table 2, at the beginning of production. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 13 8.2 Starting material The starting material for forming into fittings shall be blooms, billets, slabs, forging quality bar, plate, fusion-welded with filler metal or seamless tubular products, produced from fully-killed steels. High-frequency welded (HFW) and helical-seam submerged-arc welding (SAWH) pipes shall not be used. 8.3 Fitting manufacture 8.3.1 Forming All forming operations shall be performed in accordance with the MPS. 8.3.2 Welding Welding operations shall be conducted in accordance with those elements of ISO 3834-2 decided by agreement and the requirements of this document. Welding and repair welding shall be performed in accordance with procedures qualified in accordance with ASME IX or EN ISO 15614-1. Welders and welding operators shall be qualified in accordance with ASME IX or EN 287–1. Acceptance criteria for all tests shall be as specified in Clause 9. Where practicable, longitudinal butt welds should be double-sided. Backing rings shall not be used. All welds shall have complete penetration and shall be finished in accordance with Clause 9. Temporary welded attachments shall be removed, where possible, before heat treatment and the weld area shall be treated in accordance with 9.5.3.4 and 9.5.3.5. Fittings shall not contain girth welds. All welds that will remain in the fitting shall be heat-treated in accordance with 8.3.3. 8.3.3 Heat treatment All fittings shall be normalized, normalized and tempered, or quenched and tempered after welding and/or forming. The heat treatment shall be performed in accordance with a documented procedure. The procedure shall define the following parameters, where appropriate, for the type of heat treatment: a) heating schedule; b) soaking temperature; c) soaking time; d) cooling schedule; e) quenching temperature; f) quenching medium, including commencing and final medium temperature. A record shall be maintained of each heat treatment. When submission of the heat treatment record is specified, it shall be included in the inspection document. The tolerances on specified nominal values of soaking temperature and soaking time shall be ± 15 °C and + 20 %, respectively. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 14 8.3.4 End preparation For unequal wall thicknesses, the joint design shall be as shown in Figure 1. Dimensions in millimetres
a) Internal offset
b) External offset SIST EN 14870-2:2005
EN 14870-2:2004 (E) 15
c) Combination Key If the SMYSs of the sections to be joined are not equal, the minimum thickness, tD, shall be not less than t times the ratio of the SMYS of the pipe and fitting, but shall not exceed 1,5t. a There is no restriction on the minimum angle if the materials joined have equal SMYS. Figure 1 — Bevel designs for unequal wall thicknesses 9 Testing and inspection 9.1 General requirements Testing and inspection shall be carried out on fittings after final heat treatment. If the pipeline installation techniques will require post-weld heat treatment (PWHT) of the fitting, additional testing may be requested to demonstrate that the mechanical properties of the fitting are also achieved after PWHT. Details of the PWHT thermal cycle to be used during pipeline installation shall be specified. The test requirements and acceptance criteria shall be by agreement. Where the procedure requirements of 8.3.3 are not met, test pieces shall be taken from each heat treatment batch. 9.2 Extent of testing and inspection The testing and inspection to be performed during qualification and production shall be as summarized in Table 2 for each fitting class. Production testing shall be performed at the minimum frequency specified in Table 3. Test pieces for mechanical testing shall be taken from one or more of the following: extension lengths, formed and heat-treated as part of the fitting and/or test piece attached to the fitting; starting material which has been subjected to the same forging reduction and heat treatment as the proposed fitting; a fitting. Locations for the test pieces to be taken from a fitting shall be established by agreement. The sample of starting material shall be heat-treated with or as part of the fittings in the same heat treatment batch in accordance with EN ISO 377:1997, Clause 5. SIST EN 14870-2:2005
EN 14870-2:2004 (E) 16 Fittings heat-treated within the tolerance requirements of 8.3.3 may be considered as being in the same heat treatment condition. Table 2 — Summary of testing and inspection requirements Test Class A Class B Class C Clause number specifying acceptance criteria Chemical analysis Chemical composition M M M 9.3 Tensile – base metal M M M 9.4.2.3 Transverse weld tensile Ma Ma Ma 9.4.2.3 Impact – fitting body O M M 9.4.3.3 Impact – weld seam O M M 9.4.3.3 Through-thickness hardness O M M 9.4.4.2 Surface hardness O O O 9.4.5 Metallography Q Q Qb 9.4.6.2 HIC N N Oc,d 9.4.7 SSC N N Oc,d 9.4.8 CTOD N N O 9.4.9 Physical tests Guided ben
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