1.1 本规范提供了小型青铜截止阀（NPS）的标准尺寸 1. / 4. 安装在船上管道系统中。 1.2 本规范涵盖NPS标称管道尺寸的阀门 1. / 4. 至2，带有螺纹和钎焊端部连接。阀门符合MSS-SP80，200级。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification provides standard dimensions for small bronze globe valves (NPS 1 / 4 to 2) installed in shipboard piping systems. 1.2 This specification covers valves of a nominal pipe size from NPS 1 / 4 to 2 with threaded and brazed end connections. The valves are in accordance with MSS-SP80, Class 200. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.