本文件适用于ISO？10439（所有零件），ISO？10440-1和ISO？10440-2.尽管主要用于炼油厂，但它也适用于石化设施、天然气厂、液化天然气（LNG）设施以及石油和天然气生产设施。所提供的信息旨在帮助选择最适合各种安装中涉及的风险和环境的系统。 本文件不适用于其他类型的轴封，如间隙密封、限制环密封或油封。 本文件是API Std的补充？692，第一版（2018），其要求适用于本文件中规定的例外情况。

This document is applicable to dry gas sealing systems for axial, centrifugal, and rotary screw compressors and expanders as described in ISO？10439 (all parts), ISO？10440-1 and ISO？10440-2. Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities, gas plants, liquefied natural gas (LNG) facilities and oil and gas production facilities. The information provided is designed to aid in the selection of the system that is most appropriate for the risks and circumstances involved in various installations. This document does not apply to other types of shaft seals such as clearance seals, restrictive ring seals or oil seals. This document is a supplement to API Std？692, 1^st edition (2018), the requirements of which are applicable with the exceptions specified in this document.