ICC or DOT marking must be on each cylinder. It is an assurance of safety when the cylinder is
Identifying gas content. Use only cylinders with name of gas marked on them; do not rely on color to
identify gas content. Notify supplier if unmarked. NEVER DEFACE or alter name, number, or other
markings on a cylinder. It is illegal and hazardous.
Empties: Keep valves closed, replace caps securely; mark MT; keep them separate from FULLS and
Prohibited use. Never use a cylinder or its contents for other than its intended use, NEVER as a support
Locate or secure cylinders so they cannot be knocked over.
Passageways and work areas. Keep cylinders clear of areas where they may be struck.
Transporting cylinders. With a crane, use a secure support such as a platform or cradle. Do NOT lift
cylinders off the ground by their valves or caps, or by chains, slings, or magnets.
Do NOT expose cylinders to excessive heat, sparks, slag, and flame, etc. That may cause rupture. Do
not allow contents to exceed 130°F. Cool with water spray where such exposure exists.
Protect cylinders particularly valves from bumps, falls, falling objects, and weather. Replace caps
securely when moving cylinders.
Stuck valve. Do NOT use a hammer or wrench to open a cylinder valve that can not be opened by
hand. Notify your supplier.
Mixing gases. Never try to mix any gasses in a cylinder.
Never refill any cylinder.
Cylinder fittings should never be modified or exchanged.
Prohibited use. Never use hose other than that designed for the specified gas. A general hose
identification rule is: red for fuel gas, green for oxygen, and black for inert gases.
Use ferrules or clamps designed for the hose (not ordinary wire or other substitute) as a binding to
connect hoses to fittings.
No copper tubing splices. Use only standard brass fittings to splice hose.