Which code governs PMI (positive material identification)?

Which code governs PMI (positive material identification)?

• A. API 510
• B. API 579
• C. API 578
• D. ASME Section V

Answer: (C)

Positive material identification is governed by the Materials Verification standard, which lays out how to verify the actual material identity and chemical properties of piping and components. This standard defines when PMI must be performed (for new work, replacements, or when material provenance is uncertain), which methods are acceptable (such as X-ray fluorescence or spark/optical emission spectroscopy), and how the results should be documented and traced to the material specification. The goal is to ensure the material used matches the design and procurement documents so that properties like corrosion resistance, mechanical strength, and weldability meet the required criteria. Other codes like API 510 deal with inspection and repair, API 579 covers fitness-for-service, and ASME Section V addresses nondestructive examination; PMI-specific requirements, and the program to manage them, are provided by API 578.

Positive material identification is governed by the Materials Verification standard, which lays out how to verify the actual material identity and chemical properties of piping and components. This standard defines when PMI must be performed (for new work, replacements, or when material provenance is uncertain), which methods are acceptable (such as X-ray fluorescence or spark/optical emission spectroscopy), and how the results should be documented and traced to the material specification. The goal is to ensure the material used matches the design and procurement documents so that properties like corrosion resistance, mechanical strength, and weldability meet the required criteria. Other codes like API 510 deal with inspection and repair, API 579 covers fitness-for-service, and ASME Section V addresses nondestructive examination; PMI-specific requirements, and the program to manage them, are provided by API 578.