What is the minimum pressure rating required for valves and fittings on steam lines for high-pressure boilers?

The minimum pressure rating for valves and fittings used on steam lines for high-pressure boilers is specified as 100 psig to ensure safety and functionality under operating conditions. High-pressure boilers operate at significant pressures that can exceed 100 psig, so it is essential that all components within the system, including valves and fittings, are rated to handle these pressures without failing.

Choosing a pressure rating below 100 psig could expose the system to risks such as leakage or catastrophic failure due to overpressure situations. This requirement helps maintain the integrity of the entire steam system and ensures that it can operate safely and efficiently. A rating of 100 psig is a standard that reflects industry best practices and the necessary safety margin to account for pressure surges or variations in operating conditions.