What must be provided for the inspector to verify the heat numbers on the pipe?

Prepare for the Minnesota High Pressure Piping Test. Utilize flashcards and multiple choice questions with hints and explanations on each. Be exam ready!

To verify the heat numbers on the pipe, a mill report is essential. The mill report, also known as a mill test report (MTR) or certificate of compliance, provides critical information regarding the material used to manufacture the pipe. This document includes details such as the heat number, chemical composition, mechanical properties, and any testing conducted on the material prior to shipment.

The heat number is a unique identifier assigned to a batch of material, which allows inspectors to trace the origin and specifications of the pipe back to the manufacturer. By referencing the mill report, inspectors can confirm that the pipe meets the necessary standards and specifications for high-pressure piping systems.

In contrast, while a quality control certificate demonstrates that certain procedures were followed during manufacturing, it may not contain specific details about material properties or traceability needed for heat number verification. An installation manual focuses on guidelines for proper installation rather than material verification, and a testing schedule outlines planned inspections or tests but does not provide the necessary documentation for inspecting material properties. Thus, the mill report is the definitive document required for such verification.

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