scope:

This standard covers the minimum requirements for axial compressors, single-shaft and integrally geared process centrifugal compressors and expander-compressor for use in the petroleum, chemical, and gas industries services that handle air or gas.

This standard does not apply to fans (covered by API Std 673) or blowers that develop less than 34 kPa (5 psi) pressure rise above atmospheric pressure. This standard also does not apply to packaged, integrally-geared centrifugal plant and instrument air compressors, which are covered by API Std 672. Hot gas expanders over 300°C (570°F) are not covered in this standard.

This chapter contains information pertinent to all equipment covered by this standard. It is to be used in conjunction with the following chapters as applicable to the specific equipment covered:

Chapter 2 - Centrifugal and Axial Compressors

Chapter 3 - Integrally Geared Compressors

Chapter 4 - Expander-compressors

Note: A bullet • at the beginning of a paragraph indicates that either a decision is required or further information is to be provided by the purchaser. This information should be indicated on the data sheets (see Annex A of Chapters 2, 3 and 4); otherwise, it should be stated in the quotation request (inquiry) or in the order.