When installing a gas engine the final connection at the equipment shall be made with a

When installing a gas engine the final connection at the equipment shall be made with a

• A. Flexible connector
• B. Rigid pipe
• C. Copper tubing
• D. Flare union

Answer: (A)

Vibration isolation and movement of the equipment is the key idea. Gas engines vibrate and can shift slightly during operation, so the final connection to the engine needs to absorb that movement without stressing the joints. A flexible connector is designed for appliance connections to accommodate vibration, thermal expansion, and minor misalignment while still providing a gas-tight seal. It also makes service or replacement easier since the upstream piping isn’t forced to move with the engine. Rigid piping would transmit vibration into the joints, increasing the risk of leaks or joint failure. Copper tubing and flare unions, as typically used, do not provide the necessary flexibility to absorb engine movement, so they’re not suitable for the final connection.

Vibration isolation and movement of the equipment is the key idea. Gas engines vibrate and can shift slightly during operation, so the final connection to the engine needs to absorb that movement without stressing the joints. A flexible connector is designed for appliance connections to accommodate vibration, thermal expansion, and minor misalignment while still providing a gas-tight seal. It also makes service or replacement easier since the upstream piping isn’t forced to move with the engine.

Rigid piping would transmit vibration into the joints, increasing the risk of leaks or joint failure. Copper tubing and flare unions, as typically used, do not provide the necessary flexibility to absorb engine movement, so they’re not suitable for the final connection.