Instruct employees in the safe use of fuel gas, as follows:

• Do not use fuel gas from cylinders, through torches or other devices which are equipped with shutoff valves, without reducing the pressure through a suitable regulator attached to the cylinder valve or manifold.
• Before a regulator to a cylinder valve is connected, open the valve slightly and closed immediately. (This action is generally termed “cracking” and is intended to clear the valve of dust or dirt that might otherwise enter the regulator.) The person cracking the valve shall stand to one side of the outlet, not in front of it. The valve of a fuel gas cylinder must not be cracked where the gas would reach welding work, sparks, flame, or other possible sources of ignition.
• Open the cylinder valve slowly to prevent damage to the regulator. For quick closing, do not open fuel gas cylinder valves more than 1½ turns. When a special wrench is required, it must be left in position on the stem of the valve while the cylinder is in use so that the fuel gas flow can be shut off quickly in case of an emergency. In the case of manifolded or coupled cylinders, at least one wrench must be available for immediate use. Do not place anything on top of a fuel gas cylinder in use, which may damage the safety device or interfere with the quick closing of the valve.
• Before a regulator is removed from a cylinder valve, the cylinder valve must always be closed and the gas released from the regulator.