API SPEC 6A-2018第21版供应|API井口和采油树设备进口原版代购Specification for Wellhead and Tree Equipment, Twenty-First Edition出售-标准发行部 产品详情：
API SPEC 6A-2018  第21版
Specification for Wellhead and Tree Equipment, Twenty-First Edition
井口和采油树设备
nty-First Edition英文电子版、纸质版标准

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API SPEC 6A-2018描述(英文)：
Full Description
This document specifies requirements for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment, purchasing, repair, and remanufacture of wellhead and tree equipment for use in the petroleum and natural gas industries. This document does not apply to field use, field testing, or field repair of wellhead and Christmas tree equipment.

This document is applicable to the following specific equipment: wellhead equipment (integral, blind, and test flanges; ring gaskets; threaded connectors; tees and crosses; bullplugs; valve-removal plugs; standard and nonstandard top connectors; crossover connectors; other end connectors; adapter spools and spacer spools; gate, plug, and ball valves; actuated valves [manual and remote]; check valves [swing- and lift-type]; back-pressure valves; slip-type and mandrel-type casing and tubing hangers, casing and tubing heads [housings and adapters]; chokes [fixed, manually actuated, remotely actuated]; actuators [for valves and chokes]; surface safety valve (SSV) assemblies, valves prepared for actuators, and actuators; underwater safety valve [USV] assemblies, valves prepared for actuators, and actuators; boarding shutdown valve [BSDV] assemblies, valves prepared for actuators, and actuators; and tree assemblies).

This document defines service conditions in terms of pressure, temperature, and material class for the well-bore constituents, and operating conditions. This international standard establishes requirements for four product specification levels (PSL). These four PSL designations define different levels of technical quality requirements.
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常用更新API最新2018版标准目录：

API ICP 653 Study Guide (Nov. 2018 through July 2019) 
Study Guide for API 653 ICP Exam - Aboveground Storage Tank Inspection Certification Exam (November 2018, March 2019, and July 2019 Exams)

API ICP 510 Study Guide (May 2018 - January 2019) 
Study Guide for API 510 ICP Exam - Pressure Vessel Inspection Certification Exam (May 2018 - January 2019 Exams)

API ICP 570 Study Guide (2018) 
Study Guide for API 570 ICP Exam - Piping Inspector Certification Exam (For Exams Held in 2018)

API Std 668-2018
Brazed Aluminum Plate-fin Heat Exchangers, First Edition

API TR 979-2018Applications of Refractory Lining Materials, First Edition

API TR 13M-5-2018
Procedure for Testing and Evaluating the Performance of Friction (Drag) Reducers in Aqueous-based Fluid Flowing in Straight, Smooth Circular Conduits, First Edition

API TR 13TR3-2018
Size Measurement of Dry, Granular Drilling Fluid Particulates, First Edition

API RP 14F-2018
Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Division 1, and Division 2 Locations, Sixth Edition

API RP 621-2018
Reconditioning of Metallic Gate, Globe, and Check Valves, Fourth Edition

后续相关目录，敬请期待！

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