API RP 554: 1995 Process Instrumentation and Control. Manufacturing, Distributing, and Marketing

American Petroleum Institute (API). First Edition, September 1995. 69p. This recommended practice covers the performance requirements and considerations for the selection, specification, installation, and testing of process instrumentation and control systems. Control centers as used in the petroleum industry are also covered.
This practice is not intended to be used as a purchase specification, but makes recommendations for minimum requirements and can be used to provide guidance for the development of detailed designs and specification