API RP-578-Material Verification Program for New and Existing Alloy Piping Systems
by American Petroleum Institute

Material Veri cation Program forNew and Existing Alloy PipingSystems API RECOMMENDED PRACTICE 578FIRST EDITION, MAY 1999
COPYRIGHT 2002; American Petroleum Institute
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The purpose of this recommended practice is to provide the guidelines for a material and quality assurance system to verify that the nominal composition of alloy components within the pressure envelope of a piping system is consistent with the selected or speci ed construction materials to minimize the potential for catastrophic release of toxic or hazardous liquids or vapors.
This recommended practice provides the guidelines for material control and material veri cation programs on ferrous and nonferrous alloys during the construction, installation, maintenance, and inspection of new and existing process piping systems covered by the ASME B31.3 and API 570 piping codes. This practice applies to metallic alloy materials purchased for use either directly by the owner/user or indirectly through vendors, fabricators, or contractors and includes the supply, fabrication, and erection of these materials. Carbon steel components speci ed in new or existing piping systems are not speci cally covered under the scope of this document.