1、Specification for Subsea Pipeline ValvesAPI SPECIFICATION 6DSS SECOND EDITION, DECEMBER 2009EFFECTIVE DATE: JUNE 1, 2010CONTAINS API MONOGRAM ANNEX AS PART OF U.S. NATIONAL ADOPTIONISO 14723:2009 (Identical), Petroleum and natural gas industriesPipeline transportation systemsSubsea pipeline valvesSp
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13、should” denotes a recommendation or that which is advised but not required in order to confrom to the specification.This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard
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16、o this review cycle. Status of the publication can be ascertained from the API Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is published annually by API, 1220 L Street, NW, Washington, DC 20005.Suggested revisions are invited and should be submitted to
17、the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standardsapi.org.iiiii Contents Page API Foreword ii Foreword . v Introduction vi 1 Scope 1 2 Conformance . 1 2.1 Rounding 1 2.2 Compliance to standard 1 3 Normative references 1 4 Terms and definitions . 3 5 Symbols and abbrevi
18、ated terms 7 5.1 Symbols 7 5.2 Abbreviated terms . 8 6 Valve types and configurations . 9 6.1 Valve types . 9 6.2 Valve configurations . 9 7 Design . 23 7.1 Design codes and calculations 23 7.2 Pressure and temperature ratings . 24 7.3 Cavity relief 24 7.4 External pressure and loads 24 7.5 Sizes 25
19、 7.6 Face-to-face and end-to-end dimensions . 25 7.7 Valve operation 35 7.8 Pigging 35 7.9 Valve ends 36 7.10 Bypasses, drains and vents . 37 7.11 Manual actuator-manual operator Handwheels and wrenches . 37 7.12 Locking devices . 38 7.13 Position of the obturator . 38 7.14 Position indicators 38 7.
20、15 Travel stops . 38 7.16 ROV interface . 38 7.17 Sealant injection 38 7.18 Lifting points and supports 38 7.19 Valve operator interface 39 7.20 Drive trains . 39 7.21 Stem retention . 40 7.22 Stem/shaft protector . 40 7.23 Hydraulic lock 40 7.24 Corrosion/erosion . 40 7.25 Hyperbaric performance .
21、40 7.26 Design documents 41 7.27 Design document review 41 8 Materials . 41 8.1 Material specification 41 8.2 Service compatibility . 41 8.3 Forged parts . 42 iv 8.4 Composition limits.42 8.5 Impact test requirements of steels 42 8.6 Bolting .43 8.7 Sour service .43 9 Welding .44 9.1 Qualifications
22、.44 9.2 Impact testing requirements of weldments 44 9.3 Hardness testing 45 9.4 Repair 45 10 Quality control 46 10.1 NDE requirements46 10.2 Measuring and test equipment .46 10.3 Qualification of inspection and test personnel 47 10.4 NDE .47 10.5 NDE of repairs 47 10.6 Visual inspection of castings
23、.47 11 Testing 48 11.1 General 48 11.2 Hydrostatic shell test 48 11.3 Operational/functional test .49 11.4 Hydrostatic seat test .49 11.5 Cavity-relief test .50 11.6 Low-pressure-gas seat test 50 11.7 Draining 50 11.8 Installation of body connections after testing 51 12 Coating 51 13 Marking .51 14
24、Preparation for shipment 52 15 Documentation .53 15.1 Documentation retained by manufacturer 53 15.2 Documentation shipped with valve 53 Annex A (normative) Requirements for non-destructive examination 54 Annex B (normative) Supplementary test requirements .57 Annex C (informative) Supplementary doc
25、umentation requirements .62 Annex D (informative) Purchasing guidelines 63 Annex E (informative) Marking example .68 Annex F (informative) Monogram Annex 69 Bibliography . 72 v Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (I
26、SO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, gov
27、ernmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC
28、 Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the membe
29、r bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14723 was prepared by Technical Committee ISO/TC 67, Materials, equipmen
30、t and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline transportation systems. This second edition cancels and replaces the first edition (ISO 14723:2001), which has been technically revised. vi Introduction This International Standard is based
31、 on ISO 14313. It has been developed to address special requirements specific to subsea pipeline valves. It is necessary that users of this International Standard be aware that further or differing requirements can be required for individual applications. This International Standard is not intended
32、to inhibit a contractor from offering, or the company from accepting, alternative engineering solutions for the individual application. This can be particularly applicable where there is innovative or developing technology. Where an alternative is offered, it is the responsibility of the manufacture
33、r to identify any variations from this International Standard and provide details. 1 Petroleum and natural gas industries Pipeline transportation systems Subsea pipeline valves 1 Scope This International Standard specifies requirements and gives recommendations for the design, manufacturing, testing
34、 and documentation of ball, check, gate and plug valves for subsea application in offshore pipeline systems meeting the requirements of ISO 13623 for the petroleum and natural gas industries. This International Standard is not applicable to valves for pressure ratings exceeding PN 420 (Class 2500).
35、2 Conformance 2.1 Rounding Except as otherwise required by this International Standard, to determine conformance with the specified requirements, observed or calculated values shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accor
36、dance with the rounding method of ISO 31-0:1992, Annex B, Rule A. 2.2 Compliance to standard A quality system should be applied to assist compliance with the requirements of this International Standard. NOTE ISO/TS 29001 gives sector-specific guidance on quality management systems. The manufacturer
37、shall be responsible for complying with all of the applicable requirements of this International Standard. It shall be permissible for the purchaser to make any investigation necessary in order to be assured of compliance by the manufacturer and to reject any material that does not comply. 3 Normati
38、ve 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. ISO 7-1, Pipe threads where pressur
39、e-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 31-0:1992, Quantities and Units Part 0: General Principles ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method ISO 228-1, Pipe threads where pressure-tight joints are not made on the t
40、hreads Part 1: Dimensions, tolerances and designation ISO 5208:2008, Industrial valves Pressure testing of metallic valves ISO 9606 (all parts), Qualification test of welders Fusion welding ISO 9712, Non-destructive testing Qualification and certification of personnel 2 SPECIFICATION FOR SUBSEA PIPE
41、LINE VALVES ISO 10474, Steel and steel products Inspection documents ISO 15156 (all parts), Petroleum and natural gas industries Materials for use in H2S-containing environments in oil and gas production ISO 15607, Specification and qualification of welding procedures for metallic materials General
42、rules ISO 15609 (all parts), Specification and qualification of welding procedures for metallic materials Welding procedure specification 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 wel
43、ding of nickel alloys ASME1)B1.20.1, Pipe Threads, General Purpose (Inch) ASME B16.5, Pipe Flanges and Flanged Fittings ASME B16.10, Face-to-Face and End-to-End Dimensions of Valves ASME B16.34-2004, Valves Flanged, Threaded, and Welding End ASME B16.47-2006, Large Diameter Steel Flanges: NPS 26 Thr
44、ough NPS 60 ASME B31.4-2006, Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids ANSI/ASME B31.8-2007, Gas Transmission and Distribution Piping Systems ASME Boiler and Pressure Vessel Code, BPVC Section V:2007, Nondestructive Examination (BPVC) ASME Boiler and Pressure Vessel C
45、ode, BPVC Section VIII, Division 1:2007, Rules for Construction of Pressure Vessels (BPVC) ASME Boiler and Pressure Vessel Code, BPVC Section VIII, Division 2 :2004, Alternative Rules (BPVC) ASME Boiler and Pressure Vessel Code, BPVC Section IX, Welding and Brazing Qualifications (BPVC) ASNT SNT-TC-
46、1A2), Recommended Practice No. SNT-TC-1A Non-Destructive Testing ASTM3)A320/A320M, Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A578/A578M-07, St
47、andard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications ASTM A609/A609M-02, Standard Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel Ultrasonic Examination Thereof ASTM E562, Standard Test Method for Determining Volume F
48、raction by Systematic Manual Point Count AWS QC14), Standard for AWS Certification of Welding Inspectors EN 287 (all parts), Qualification test of welders Fusion welding EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 1: Steel flan
49、ges EN 10204:2004, Metallic materials Types of inspection documents 1) American Society of Mechanical Engineers, 345 East 47th Street, NY 10017-2392, USA. 2) American Society of Non-Destructive Testing, PO box 28518, 1711 Arlingate Lane, Columbus, OH 43228-0518, USA. 3) American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, USA. 4) The American Welding Society, 550 NW LeJeune Road, Miami, FL 33126, USA. API SPEC 6DSS/ISO 14723 3 MSS5)SP-44, Steel Pipeline Flanges MSS SP-55, Quality Standard for S
