300 Cubic Foot Tank

A full-height 300 cf steel oxygen cylinder is a heavy shop bottle that should be moved on a cylinder cart rather than lifted. Steel cylinders weigh substantially more than aluminium ones of the same capacity, and the gas itself adds comparatively little. Anyone needing to lift or carry the cylinder should choose a smaller size.

Oxygen cylinders are commonly sold in 20, 40, 80, 125, 250, and 300 cubic foot sizes, with 300 cf the largest standard industrial size. The number refers to the cubic feet of gas the cylinder holds at full pressure, not its physical dimensions. Choosing a size is a trade between refill frequency and portability.

No. This is an industrial oxygen cylinder sold empty for cutting, brazing, and industrial applications. Medical oxygen is a prescription product that must be filled by a licensed facility, and breathing gas for diving or SCBA has separate purity and equipment requirements.

Run time depends entirely on torch tip size and cutting thickness, and oxygen is consumed far faster than acetylene during cutting. A 300 cf cylinder is chosen precisely because smaller bottles empty quickly on a cutting torch. Pairing it with a correctly sized acetylene cylinder avoids running out of one gas well before the other.

Oxygen is consumed much faster than acetylene in cutting work, so an oxygen cylinder is normally paired with an acetylene cylinder of smaller capacity. Matching a large oxygen bottle to an undersized acetylene bottle, or the reverse, means one runs dry long before the other. Suppliers can advise the pairing for a specific torch and tip.

It requires a regulator with a CGA540 inlet, the standard connection for industrial oxygen in the United States. The regulator is not included and must be rated for oxygen service. Never fit a regulator intended for fuel gas or inert gas to an oxygen cylinder.

Oxygen dramatically accelerates combustion, and oil or grease in contact with high-pressure oxygen can ignite violently without any spark. Valves, regulators, hands, gloves, and threads must be kept clean and free of petroleum products. This is the single most important safety rule specific to oxygen and does not apply to inert gases.

Owning removes the monthly rental or demurrage charge that applies to a leased cylinder whether or not it is used, and allows refilling at whichever supplier is most convenient. Leasing can suit very occasional users who prefer a swap-and-go arrangement. For anyone using oxygen regularly, ownership costs less over a year.

It ships empty. Compressed oxygen cannot be transported by standard carriers under hazardous materials rules, so the cylinder arrives with its CGA540 valve installed and is filled at a local gas supplier.

Store it upright and secured against tipping, with the protective cap fitted when the regulator is removed, and keep oxygen cylinders separated from fuel gas cylinders such as acetylene. Storage areas should be well ventilated and clear of oil, grease, and ignition sources. Separation of oxygen and fuel gas in storage is a standard requirement, not a precaution.