This recommended practice (RP) aids in selection of valves for the hydrocarbon processing industry (HPI) and may also assist in the selection of valves for other industrial processes, such as power or general industry process applications. Selection guidance is provided for valve types covered by ASME B16.34 and API valve standards for the downstream segment, which include gate, ball, plug, butterfly, check, and globe valves. Modulating control valves and pressure relief valves are outside the scope of this RP.

The task force members who developed this document represent many years of experience in the design and selection of valves and are composed of professionals from manufacturing, engineering contractors, and end users.

The objective of this RP is to disseminate suggested information on valve selection recommendations as an aid to reduce operational problems and maintenance costs.

Although this RP provides guidance on the selection of valves, the valve specifier or end user is required to pay particular attention to, and is ultimately responsible for, all aspects of the application involving process, metallurgical, and mechanical considerations.

Typical purchase descriptions are provided in Annex B to assist in the complete definition of valve details to help ensure that the correct product is specified for the intended application.
Of prime importance, however, is that this RP is a general guideline for valve selection; the final responsibility is that of the user of this document.