API SPEC 6DSS-2009 pdf download

API SPEC 6DSS-2009 pdf download.Specification for Subsea Pipeline Valves
1 Scope This International Standard specifies requirements and gives recommendations for the design, manufacturing, testing 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). 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 accordance 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 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 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. ISO 7-1, Pipe threads where pressure-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 threads — Part 1: Dimensions, tolerances and designation
ISO 15607, Specification and qualification of welding procedures for metallic materials — General 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 welding of nickel alloys ASME 1) 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 Through 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 Code, 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-1A 2) , Recommended Practice No. SNT-TC-1A — Non-Destructive Testing ASTM 3) 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, Standard 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
4 Terms and definitions For the purposes of this document, the following terms and definitions apply. 4.1 ASME rating class numerical pressure design class defined in ASME B16.34 and used for reference purposes NOTE The ASME rating class is designated by the word “Class” followed by a number. [ISO 14313:2007, 4.1] 4.2 bi-directional valve valve designed for blocking the fluid in both downstream and upstream directions [ISO 14313:2007, 4.2] 4.3 bleed drain or vent [ISO 14313:2007, 4.3] 4.4 block valve gate, plug or ball valve that blocks flow into the downstream conduit when in the closed position NOTE Valves are either single- or double-seated, bi-directional or uni-directional. [ISO 14313:2007, 4.4] 4.5 breakaway thrust breakaway torque maximum thrust or torque required to operate a valve at maximum pressure differential [ISO 14313:2007, 4.5] 4.6 by agreement agreed between manufacturer and purchaser [ISO 14313:2007, 4.6] 4.7 double-block-and-bleed valve DBB single valve with two seating surfaces that in the closed position provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces [ISO 14313:2007, 4.7]