Abstract: API has published Dry Gas Sealing Systems for Axial, Centrifugal, Rotary Screw Compressors and Expanders, API Standard 692 First Edition in June, 2018. Although there are relative paragraphs about dry gas seal in API 617 and API 614, there wasn't dedicated standard for dry gas seal of centrifugal compressors before the publishing of API 692. The specifications executed in the past engineering practices were mainly based on the relevant chapters of API 617 and API 614, as well as manufacturers' specifications and engineering regulations of some engineering companies. Some of the above specifications are relatively broad in content, and some are formulated for specific devices or specific units. So they're not universal specifications. When using dry gas seal, many users install, maintain and operate the seal according to the manufacturers' specifications and previous experiences. Therefore, it's necessary for API to publish API 692 as a dedicated dry gas sealing standard. This standard contains very rich content and the requirements in it are high. The paper expounds some key contents of API 692 and analyzes briefly how API 692 is applied in the design of dry gas seal engineering of centrifugal compressors in refinery and petrochemical plants.

Key words: API 692, centrifugal compressor, dry gas seal, engineering practice