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ASME B16.34 or applicable valve manufacturer data. Upon completion of the pressure test, pressure relief devices of the proper settings and other appurtenances removed or made inoperable during the pressure test shall be reinstalled or reactivated. Before applying a pressure test, appropriate precautions and procedures should be taken into account to assure the safety of personnel involved with the pressure test. A close visual inspection of piping components should not be performed until the equipment pressure is at or below the MAWP. This review is especially important for in-service piping. 5.8.5 Pressure

Testing Alternatives Appropriate NDE shall be specified and conducted when a pressure test is not performed after a major repair or alteration. Substituting NDE procedures for a pressure test after an alteration is allowed only after the engineer and inspector have approved the substitution. For cases where UT is substituted for radiographic inspection, the owner/user shall specify industry-qualified UT shear wave examiners or the bing.com application of ASME B31 Code Case 179/181, as applicable, for closure welds that have not been pressure tested and for welding repairs identified by the engineer or inspector. 5.9 Material Verification and Traceability During repairs or alterations to alloy material piping systems, where the alloy material is required to maintain pressure containment, the inspector shall verify that the installation of new materials is consistent with the selected or specified construction materials. This material verification program should be consistent with API 578.

Using risk assessment procedures, the owner/user can make this assessment by 100 % verification, PMI testing in certain critical asme bpvc section viii div 1 situations, or by sampling a percentage of the materials. PMI testing can be accomplished by the inspector or the examiner with the use of suitable methods as described in API 578. If a piping system component should fail because an incorrect material was inadvertently substituted for the proper piping material, the inspector shall consider the need for further verification of existing piping materials.