This standard establishes the minimum requirements for constant-speed@ packages@ integrally geares centrifugal air compressors@ including their accessories. It may be applies for gas services other than air that are nonhazardous and nontoxic. This standard is not applicable to machines that develop a pressure rise of less than 5.0 pounds per square inch (0.34 bar) above atmospheric pressure@ which are classed as fans or blowers.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 Appendix A); otherwise it should be stated in the quotation request or in the order.