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Description / Abstract:
This Practice describes the minimum requirements for PMI for
equipment, equipment internals, piping and piping components, and
weld consumables. This Practice supplements API RP 578
requirements.
Purpose
This Practice provides the Positive Material Identification
(PMI) minimum requirements to ensure that only the alloy materials
specified in the contract documents are provided in equipment,
equipment internals, piping and piping components, and weld
consumables.