1.1 本规范涵盖船用离心泵和容积泵的机械端面密封。 1.2 以下类型的密封不包括在本规范中:唇形密封、油封、环形密封或迷宫式密封。 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。一个配套的硬公制标准正在编制过程中。 1.4 美国海军船用泵应用的特殊要求包含在补充S1中。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers mechanical end-face seals for centrifugal and positive displacement pumps for shipboard use. 1.2 The following types of seals are not included in this specification: lip seals, oil seals, circumferential seals, or labyrinth seals. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. A companion hard metric standard is in the process of preparation. 1.4 Special requirements for U.S. Navy Shipboard Pump Applications are included in Supplement S1. 1.5 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.