What should welding personnel do if a leak around the valve stem of a fuel gas cylinder is found?

What should welding personnel do if a leak around the valve stem of a fuel gas cylinder is found?

• A. Keep cylinder wet with a heavy water stream
• B. Tighten the packing nuts or close the cylinder valve
• C. Seal the leak with heavy duty tape or industrial adhesive
• D. Immediately evacuate the area

Answer: (B)

A leak at the valve stem is caused by the seal around the stem not holding, so the immediate fix is to control the gas flow at the source by tightening the packing nut or, if needed, closing the cylinder valve. This stops the leak rather than trying to patch it, which isn’t a safe or approved remedy for fuel-gas cylinders. Sealing with tape or adhesive is not appropriate for gas leaks, and watering the area doesn’t stop the leak or address the unsafe condition. If tightening the packing nut or closing the valve doesn’t stop the leak, or if you can’t reach the valve safely, evacuate the area and follow emergency procedures.

A leak at the valve stem is caused by the seal around the stem not holding, so the immediate fix is to control the gas flow at the source by tightening the packing nut or, if needed, closing the cylinder valve. This stops the leak rather than trying to patch it, which isn’t a safe or approved remedy for fuel-gas cylinders. Sealing with tape or adhesive is not appropriate for gas leaks, and watering the area doesn’t stop the leak or address the unsafe condition. If tightening the packing nut or closing the valve doesn’t stop the leak, or if you can’t reach the valve safely, evacuate the area and follow emergency procedures.