标准摘要
This international standard specifies the requirements for a series of compact steel gate, globe and check valves for petroleum and natural gas industry applications. It is applicable to valves of: — nominal pipe sizes NPS 1/4, NPS 3/8, NPS 1/2, NPS 3/4, NPS 1, NPS 1 1/4, NPS 1 1/2, NPS 2, NPS 2 1/2, NPS 3, and NPS 4; — corresponding to nominal sizes DN 8, DN 10, DN 15, DN 20, DN 25, DN 32, DN 40, DN 50, DN 65, DN 80, and DN 100. It is also applicable to pressure designations of Class 150, Class 300, Class 600, Class 800 and Class 1500. Class 800 is not a listed class designation, but is an intermediate class number widely used for socket welding and threaded end compact valves. It includes provisions for the following valve characteristics. — Outside screw with rising stems (OS & Y), in sizes 1/4 ? NPS ? 4 (8 ? DN ? 100) and pressure designations including Class 800. — Inside screw with rising stems (ISRS), in sizes 1/4 ? NPS ? 2 1/2 (8 ? DN ? 65) and pressure designations of classes
英文名称Gate, Globe, and Check Valves for Sizes DN 100 (NPS 4) and Smaller for the Petroleum an