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Glossary

Positive material identification (PMI)

Positive material identification (PMI) verifies the chemical composition and alloy grade of a component, weld or fitting non-destructively, usually with a handheld X-ray fluorescence (XRF) or laser-induced breakdown spectroscopy (LIBS) analyser.

Published

Also known as: PMI, alloy verification, material verification.

How it works

The analyser excites the surface and reads the characteristic spectrum of the elements present, then matches the composition to a grade library. Results are recorded per component with its location, heat number or tag, and any mismatch is raised as a non-conformance.

Where it is used

Refineries and petrochemical plants, new fabrication and turnaround scopes, valve and fitting receipt inspection, and verification after suspected mix-ups.

PMI in AMPS

PMI scopes produce many short records against many components. In AMPS every asset and job carries a QR code. Scanning it opens the asset page and the history of jobs performed on it, assets can hold sub-assets, and jobs can be grouped, for example per shutdown. Reports come from your own Word template with client, PO and location data filled in automatically.

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