What pressure should coated copper tubing or corrugated stainless-steel tubing be tested to on a 2 psi supply of 150 feet?

The appropriate test pressure for coated copper tubing or corrugated stainless-steel tubing in this context is vital for ensuring the integrity and safety of the gas installation. When dealing with a gas supply system designated for 2 psi, the testing pressure is typically set higher to ensure that any potential leaks can be detected.

Testing at 15 psig for 15 minutes is generally regarded as a standard practice for a system with a supply pressure of 2 psi. This pressure not only provides a sufficient safety margin above the operating pressure but also allows for consistent monitoring over time. The 15-minute duration enables technicians to observe any changes in pressure that might indicate a leak, ensuring the reliability of the system before it is put into use.

Testing at pressures lower than this might not effectively verify the system's integrity, while higher testing pressures could unnecessarily strain the materials involved. Therefore, 15 psig for 15 minutes is the correct answer because it reflects both industry standards and the need for thorough verification of the gas system's safety and performance.