This paper outlines the American Petroleum Institute specifications that are available for turbomachinery, and presents information on how these industry specifications are prepared and modified. The advisability of individual company specifications, supplementing those of API, is covered. Further, the specification areas requiring decisions by the Purchaser for each specific application are reviewed: these include type of driver, control system, equipment orientation, materials, requirements or limitation, equipment details such as casing and impeller construction and seal and coupling type, oil system arrangements and features, required instrumentation, degree of testing, and drawing and data requirements. The importance of safety considerations for each specific application, including the increasing problem of noise level, is reviewed. Finally, a workable “purchasing” procedure is presented.
Housmnn, J. G. (1972). Turbomachinery Specifications. Texas A&M University. Gas Turbine Laboratories. Available electronically from