A leak check should be performed under which of the following conditions: Immediately after the gas is turned on into new or modified piping; After an interruption of service; When a vapor meter has been replaced

A leak check should be performed under which of the following conditions: Immediately after the gas is turned on into new or modified piping; After an interruption of service; When a vapor meter has been replaced

• A. Immediately after gas turned on
• B. After interruption
• C. When vapor meter replaced
• D. All of the above

Answer: (D)

Leak checks verify gas-tight integrity after any work that could affect seals or connections. When turning on gas into new or modified piping, new joints or fittings may have small leaks that aren’t visible until gas flows. After an interruption of service, valves and connections can shift or reseal when gas is reintroduced, so a check is essential before restoring service. Replacing a vapor meter disturbs the meter and its connections, which can introduce leaks if seals aren’t perfect. Because any of these situations can create a leak, the correct practice is to perform a leak check after each one, i.e., after turning on gas into new or modified piping, after an interruption of service, and after a vapor meter is replaced. Use approved leak-detection methods to confirm there are no leaks before the system is put back into service.

Leak checks verify gas-tight integrity after any work that could affect seals or connections. When turning on gas into new or modified piping, new joints or fittings may have small leaks that aren’t visible until gas flows. After an interruption of service, valves and connections can shift or reseal when gas is reintroduced, so a check is essential before restoring service. Replacing a vapor meter disturbs the meter and its connections, which can introduce leaks if seals aren’t perfect. Because any of these situations can create a leak, the correct practice is to perform a leak check after each one, i.e., after turning on gas into new or modified piping, after an interruption of service, and after a vapor meter is replaced. Use approved leak-detection methods to confirm there are no leaks before the system is put back into service.