ASMT A234 WPB - how to verify product marking for pipe fittings

The minimum information shall be identified on the product during inspection
Manufacturer
Specification
Dimension
Trace number

Marking product accordance to ASME B16.9

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Trace numer is heat number right?

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This trace number may be heat number or code number, code marking,… purpose to traceability material into welding summary.

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