In Maryland, when performing gas piping installation above a certain pressure, what is required?

In Maryland, when performing gas piping installation above a certain pressure, what is required?

• A. Leak-tightness test per applicable code (IFGC/IMC), typically hydrostatic or gas pressure test during installation.
• B. Visual inspection
• C. Smoke test
• D. Pressure decay test

Answer: (A)

When gas piping will carry pressure above a certain level, the safety standard is to prove the system is free of leaks with a leak-tightness test. This requirement comes from the codes governing gas installations and is the key step before putting the system into service. The test is typically done as a hydrostatic test (filling the piping with water and pressurizing it) or a gas pressure test (pressurizing with air or another inert gas) to a pressure specified by the International Fuel Gas Code and the International Mechanical Code. A visual inspection alone cannot reveal hidden leaks in joints or connections, which is why it’s not sufficient by itself. Smoke testing isn’t used for gas piping because it won’t reliably show leaks in piping and fittings, and a pressure decay test isn’t the standard method required by these codes for this purpose. So the required action is a leak-tightness test performed to code, usually during installation, to confirm system integrity before use.

When gas piping will carry pressure above a certain level, the safety standard is to prove the system is free of leaks with a leak-tightness test. This requirement comes from the codes governing gas installations and is the key step before putting the system into service. The test is typically done as a hydrostatic test (filling the piping with water and pressurizing it) or a gas pressure test (pressurizing with air or another inert gas) to a pressure specified by the International Fuel Gas Code and the International Mechanical Code.

A visual inspection alone cannot reveal hidden leaks in joints or connections, which is why it’s not sufficient by itself. Smoke testing isn’t used for gas piping because it won’t reliably show leaks in piping and fittings, and a pressure decay test isn’t the standard method required by these codes for this purpose. So the required action is a leak-tightness test performed to code, usually during installation, to confirm system integrity before use.