新资产和现有资产的资产验证计划（MVP）指南

The purpose of this recommended practice (RP) is to provide the guidelines for the owner/user to develop and implement a material verification program (MVP) as part of an asset integrity program. The MVP uses positive material identification and other methods to verify that the nominal composition of an asset, an asset component, or weldment within the pressure envelope is consistent with the selected or specified construction materials. A well designed and implemented MVP is an important management system used to minimize the potential for release of hazardous substances due to nonconforming materials of construction. This RP provides the guidelines for material verification programs involving ferrous and non-ferrous alloys during the construction, installation, maintenance, and inspection of new and existing process equipment. This RP applies to metallic materials purchased for use either directly by the owner/user or indirectly through distributors, fabricators, or contractors a