Class 5 Boiler Practice Exam

What must flanges installed on steam piping systems be stamped with?

1. Manufacturer's name and ASME B.16.5 class number

2. Only the manufacturer's name

3. Pipe diameter and pressure rating

4. Location of installation

The correct answer is: Manufacturer's name and ASME B.16.5 class number

Flanges in steam piping systems are critical components that must adhere to specific regulations for safety and proper functioning. The requirement for flanges to be stamped with the manufacturer's name and the ASME B16.5 class number is rooted in ensuring that the flanges meet recognized standards for materials, dimensions, and pressure ratings. The manufacturer's name indicates the source of the equipment, which is essential for quality assurance and traceability. If any issues arise, knowing who manufactured the flange helps in acquiring replacement parts or troubleshooting any problems. The ASME B16.5 class number relates to the flange's pressure-temperature rating and is crucial for ensuring that the flange can handle the operational conditions of the steam piping system. It specifies the maximum pressure and temperature the flange can withstand without failure, thereby playing a vital role in the safety and effectiveness of the steam system. This standardization ensures that components used are compatible and reliable for the intended application. Thus, having both the manufacturer's name and the ASME B16.5 class number stamped on the flanges provides necessary information that ensures compliance with safety and industry standards.