Things You'll Need
Instructions
Open the welding gas cylinder by opening the main cylinder valve on the top of the bottle. Ensure there is adequate ventilation.
Connect the nitrogen gas cylinder to the used welding bottle using the high-pressure tubing and appropriate fittings per the configuration of the bottle nozzles.
Open the nitrogen cylinder and the welding bottle valves to allow nitrogen to flow into the welding bottle. Allow the two cylinders to equalize in pressure. This should take approximately 30 seconds. Close both cylinder valves and disconnect the nitrogen bottle.
Open the welding gas cylinder valve and allow the nitrogen to completely empty. The bottle is now inserted and cleaned of any residual welding gas. Connect the bottle to a natural gas source and fill the bottle with methane.