What must be included in any system application above 135 psi?

In any steam system application operating above 135 psi, it is essential to include two steam valves. This requirement is primarily rooted in safety protocols and operational reliability.

The first valve serves as the primary control or isolation valve, allowing operators to regulate or stop the flow of steam. The second valve, often referred to as a safety or check valve, provides an additional layer of protection. In the event that the primary valve fails, the secondary valve can prevent steam from escaping the system, thereby protecting personnel and equipment from potential hazards associated with high-pressure steam release.

By incorporating two steam valves, the system can ensure that it remains safe during operation and maintenance. This redundancy is crucial in high-pressure applications where the stakes of failure are significantly increased. The guidelines of better engineering practices and regulatory requirements emphasize this aspect to maintain a safe working environment for all involved.