Who has the responsibility to determine the extent of PMI (Positive Material Identification) performed?

Who has the responsibility to determine the extent of PMI (Positive Material Identification) performed?

• A. The purchaser.
• B. The welder.
• C. The owner/user.
• D. The QA inspector.

Answer: (C)

The person who owns the plant or uses the equipment sets how much PMI to perform. They carry the responsibility for meeting the engineering design, material specifications, and safety requirements, so they determine the scope of material identification needed to verify that the actual materials match what the design calls for and to manage risk in service. PMI extent is chosen based on factors like component criticality, operating conditions, and the potential impact of using the wrong alloy. The actual PMI work is carried out under the owner’s program (often by QA or PMI technicians) and is documented accordingly, but the decision on how wide or limited the PMI coverage should be comes from the owner/user. The purchaser handles procurement terms, the welder focuses on fabrication, and the QA inspector verifies that PMI is performed correctly, but they do not decide the overall scope.

The person who owns the plant or uses the equipment sets how much PMI to perform. They carry the responsibility for meeting the engineering design, material specifications, and safety requirements, so they determine the scope of material identification needed to verify that the actual materials match what the design calls for and to manage risk in service. PMI extent is chosen based on factors like component criticality, operating conditions, and the potential impact of using the wrong alloy. The actual PMI work is carried out under the owner’s program (often by QA or PMI technicians) and is documented accordingly, but the decision on how wide or limited the PMI coverage should be comes from the owner/user. The purchaser handles procurement terms, the welder focuses on fabrication, and the QA inspector verifies that PMI is performed correctly, but they do not decide the overall scope.