工业阀门低温用隔离阀第1部分:设计、制造和生产试验

[中文适用范围]： 本文件规定了用作低温应用的隔离阀和止回阀的闸阀、截止阀、球阀/旋塞阀和蝶阀设计类型的设计、尺寸、材料、制造和生产测试的要求。本文件适用于低温和低温服务中使用的隔离阀，其设计低温服务为-50°C 至-196°C。本文件不适用于按照 ISO 21011 设计用于低温容器的低温服务阀门。当本文件的要求与阀门产品标准中的要求不同时，以本文件的要求为准。本文件适用于阀体、阀盖、阀盖延伸部分或盖子由金属材料制成的阀门。本文件适用于：——公称尺寸 DN 的阀门：10；15；20；25；32；40；50；65；80；100；125；150；200；250；300； 350；400；450；500；600；650；700；750；800；850；900；950；1000；1050；1200；1350；1400；1500；1600；1650；1800，— 对应于公称管道尺寸 NPS：⅜；½；¾；1；1 ¼；1 ½；2；2 ½；3；4；5；6；8；10；12；14；16；18；20；24；26；28；30；32；34；36；38；40；42；48；54；56； 60；64；66；72，并适用于压力等级： — PN 16；25；40；100；160；250；400， — Class 150；300；600；800；900；1500；2500。 注：并非所有类型和尺寸组合都适用于所有压力等级。本文件不适用于安全阀和控制阀。 [外文原描述]： This document specifies requirements for design, dimensions, material, fabrication and production testing of gate, globe, ball/plug and butterfly valve design types used as isolation valves and check valves for low-temperature applications. This document is applicable to isolation valves for use in low and cryogenic temperature service where the design low-temperature service is -50 °C down to –196 °C. This document does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels. Where the requirements of this document vary from those given in the valve product standards, the requirements of this document apply. This document is applicable to valves with body, bonnet, bonnet extension or cover made of metallic materials. This document is applicable to: — valves of nominal sizes DN: 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 650; 700; 750; 800; 850; 900; 950; 1 000; 1 050; 1 200; 1 350; 1 400; 1 500; 1 600; 1 650; 1 800, — corresponding to nominal pipe sizes NPS: ⅜; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 26; 28; 30; 32; 34; 36; 38; 40; 42; 48; 54; 56; 60; 64; 66; 72, and applies to pressure designations: — PN 16; 25; 40; 100; 160; 250; 400, — Class 150; 300; 600; 800; 900; 1 500; 2 500. NOTE Not all type and size combination are available in all pressure ratings. This document does not apply to safety valves and control valves.