API 618 5th Edition defines minimum requirements for medium‑ and low‑speed centrifugal compressors used in oil, petrochemical and gas industries.
This standard specifies the minimum design, material, testing, installation, operation and maintenance requirements for centrifugal compressors and their drive equipment in the oil, petrochemical and natural‑gas sectors. It applies to medium and low speed centrifugal compressors and related components such as bearings, control systems, instrumentation, intercoolers, after‑coolers, anti‑surge systems and auxiliary equipment.
The document also outlines exclusions, including integral compressors driving gas turbines, compressors used solely as stand‑alone valves, and compressors or instrument compressors operating at pressures of 9 barg (125 psig) or higher. It provides guidance on compliance, testing procedures, and reference standards. This manual is written in Chinese.