BS ISO 21157:2018规定了低温球的设计、制造和试验方法要求 确保阀门在极低温度（-196°C）下具有良好的泄漏稳定性 至80摄氏度）。交叉引用:ASTM A312/A312API 6FAASTM A351/A351MAPI 6DASME B16。25ASTMA193/A193MASM E 446ISO 5208ASTM A320/A320M ASTM A182/A182MASME B16。5ISO 28921-1ISO 5211ISO 5209ASTM A276ASME B16。10。11ASTM A194/A194MASTM E186ASME B16。34:2017购买本文件时可获得的所有当前修订均包含在购买本文件中。

BS ISO 21157:2018 specifies requirements for design, manufacture and test methods of cryogenic ball valves in order to have an excellent quality leakage stability in a very low temperature service (-196 °C to 80 °C).Cross References:ASTM A312/A312MAPI 6FAASTM A351/A351MAPI 6DASME B16.25ASTMA193/A193MASTM E 446ISO 5208ASTM A320/A320MASTM A182/A182MASME B16.5ISO 28921-1ISO 5211ISO 5209ASTM A276ASME B16.10ASME B16.11ASTM A194/A194MASTM E186ASME B16.34:2017All current amendments available at time of purchase are included with the purchase of this document.