Which AB-500 series document specifies requirements for in-service inspection of pressure equipment?

• A. AB-521
• B. AB-524
• C. AB-506
• D. AB-525

Answer: (C)

The document that specifies requirements for in-service inspection of pressure equipment is AB-506. This document outlines critical guidelines and protocols that must be followed during the in-service inspection process, ensuring that pressure equipment remains safe to operate and compliant with relevant standards. In-service inspection is vital for identifying any potential issues that could compromise the integrity of the equipment over time, and AB-506 provides the necessary framework for conducting these inspections systematically and effectively.

The other options do not focus specifically on in-service inspections. Instead, they may cover other aspects of pressure equipment or different types of assessments, which is why they are not applicable to the question regarding in-service inspection requirements. Understanding the unique role of AB-506 within the AB-500 series is essential for anyone involved in the maintenance and safety of pressure equipment systems.