scope:

This standard covers the minimum requirements for centrifugal compressors used in petroleum, chemical, and gas industries services that handle air or gas. This standard does not apply to fans or blowers that develop less than 34 kPa (5 pounds per square inch) pressure rise above atmospheric pressure; these are covered by API Standard 673. This standard also does not apply to packaged, integrally-geared centrifugal air compressors, which are covered by API Standard 672.

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