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API 6D 2002 pdf free download

API 6D 2002 pdf free download.Pipeline Valves API Specification 6D, Twenty-second Edition January 2002 ISO 14313: 1999, Petroleum and Natural Gas Industries—Pipeline Transportation Systems— Pipeline Valves.
Scope This International Standard specifies requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for application in pipeline systems meeting the requirements of ISO 1 3623 for the petroleum and natural gas industries. Valves for pressure ratings exceeding PN 420 (Class 2500) are not covered by this International Standard. Annex A of this International Standard provides guidelines to assist the purchaser with valve type selection and specification of specific requirements when ordering valves. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. NOTE Non-International Standards may be replaced, by agreement, with other recognized and equivalent national or industry standards. ISO 7-1 , Pipe threads where pressure-tight joints are made on the threads—Part 1: Dimensions, tolerances and designation. ISO 1 48, Steel — Charpy impact test (V-notch). ISO 228-1 , Pipe threads where pressure-tight joints are not made on the threads—Part 1: Dimensions, tolerances and designation. ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads—Part 2: Verification by means of limit gauges. ISO 5208, Industrial valves—Pressure testing of valves. ISO 7005-1 , Metallic flanges—Part 1: Steel flanges. ISO 1 0474, Steel and steel products—Inspection documents. ISO 1 0497, Testing of valves—Fire type-testing requirements.
3.20 position indicator device to show the position of the valve obturator 3.21 powered actuator powered operator electric, hydraulic or pneumatic device bolted or otherwise attached to the valve for powered opening and closing of the valve 3.22 pressure class numerical pressure design class expressed in accordance with either the nominal pressure (PN) class or the ANSI rating class NOTE In this International Standard, the pressure class is stated by the PN class followed by the ANSI rating class between brackets. 3.23 pressure-containing parts parts, such as bodies, bonnets, glands, stems, gaskets and bolting, designed to contain the pipeline fluid 3.24 pressure-controlling parts parts, such as seat and obturator, intended to block or permit the flow of fluids 3.25 process-wetted parts parts exposed directly to the pipeline fluid 3.26 reduced-opening valve valve with the opening through the obturator smaller than at the end connection(s) 3.27 seating surfaces contact surfaces of the obturator and seat which ensure valve sealing 3.28 stem part that connects the obturator to the operator and which may consist of one or more components 3.29 stem extension assembly assembly consisting of the stem extension and the stem extension housing 3.30 support ribs or legs metal structure which provides a stable footing when the valve is set on a fixed base 3.31 through-conduit valve valve with an unobstructed and continuous cylindrical opening 3.32 twin-seat, both seats bi-directional, valve valve with two seats, each sealing in both directions
5 Valve types and configurations 5.1 Valve types 5.1 .1 Gate valves Typical configurations for gate valves with flanged and welding ends are shown, for illustration purposes only, in Figures 1 and 2. Gate valves shall have an obturator which moves in a plane perpendicular to the direction of flow. The gate can be constructed of one piece for slab-gate valves or of two or more pieces for expanding-gate valves. Gate valves shall be provided with a back seat or secondary stem sealing feature in addition to the primary stem seal. 5.1 .2 Lubricated and non-lubricated plug valves Typical configurations for plug valves with flanged and welding ends are shown, for illustration purposes only, in Figure 3 . Plug valves shall have a cylindrical or conical obturator which rotates about an axis perpendicular to the direction of flow. 5.1 .3 Ball valves Typical configurations for ball valves with flanged or welding ends are shown, for illustration purposes only, in Figures 4, 5 and 6. Ball valves shall have a spherical obturator which rotates on an axis perpendicular to the direction of flow.

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