![]() ![]() If this occurs, an explosion can occur if the gases are lighted before bleeding off the oxygen. ![]() The result is that the fuel gas such as acetylene can flow into the oxygen hose and regulator. Reverse flow occurs when the bottle oxygen cylinder is near empty at the same time another gas, such as acetylene is not. Green for oxygen and red for acetylene Reverse Flow Danger Reverse Flow Diagram ![]() Always store bottle oxygen separately from other fuel-gas cylinders (a minimum distance of 20 feet) or use a noncombustible barrier at least 5 feet away with a fire resistance rating of at least 1/2 hour.The correct way to move a bottle is chained in a 2 wheel dolly, not by rolling with your hands.height wall with a 30 minute fire rating (usually cinder block) Oxygen bottles should never be stored with flammables/combustibles.New clam style safety caps allow bottles to be capped even when a regulator is attached.The bottle must be capped any time a regulator is not attached to the valve.Keep fittings, regulators and hoses free from oil, dirt and gas as they can explode under high-pressure oxygen.Never allow a tank to go empty as this may allow one gas to backflow into the other gas line or bottle.The opening at the top of the bottle is smaller than a pencil, if damaged, the bottle can become a projectile and could cause injury or property damage.Shown: Milwaukee Hand Trucks 40501 – Welding Cylinder Truck Related: Welding Gas Types Welding Oxygen Basics Welding Cylinder TruckĪ cylinder truck will keep cylinders from being knocked over when used. The cylinder is fabricated from a single plate of high-grade steel so that it will have no seams and is heat-treated to achieve maximum strength.īecause of their high pressure, oxygen cylinders undergo extensive testing prior to their release for work, and must be periodically tested thereafter. It is made of steel and has a capacity of 220 cu ft at a pressure of 2000 psi (13,790 kPa) and a temperature of 70☏ (21☌).Īttached equipment provided by the oxygen supplier consists of an outlet valve, a removable metal cap for the protection of the valve, and a low melting point safety fuse plug and disk. Oxygen CylinderĪ typical bottle oxygen cylinder is shown in figure 5-7 below. Each gas is collected and compressed into cylinders for use. The oxygen collects at the positive terminal and the hydrogen at the negative terminal. In the electrolytic process, water is broken down into hydrogen and oxygen by the passage of an electric current. The liquid air process is by far the most widely used to produce oxygen. These gases, having been separated, are then further purified and compressed into cylinders for use. As the temperature of the liquid air rises, nitrogen in a gaseous form is given off first, since its boiling point is lower than that of liquid oxygen. In the liquid air process, air is compressed and cooled to a point where the gases become liquid. Production of Bottled Oxygenīottle oxygen is obtained commercially either by the liquid air process or by the electrolytic process. If the concentration of oxygen is 23.5% or higher, it will cause a gas to explode or burn 8 times faster. ![]() If an oxygen cylinder is leaking, the oxygen will settle into low areas. Oxygen should never be used in any air tools or for any of the purposes for which compressed air is normally used. Oil and grease in the presence of oxygen may spontaneously ignite and burn violently or explode. Pure oxygen will support and accelerate combustion of almost any material, and is especially dangerous in the presence of oil and grease. Oxygen cylinders and apparatus should not be handled with oily hands or oily gloves. It is an accelerator that causes other gases to burn hotter, faster and at lower temperatures.Īlways refer to oxygen as oxygen, never as air.Ĭombustibles should be kept away from oxygen, including the cylinder, valves, regulators, and other hose apparatus. The cylinders fittings for oxygen are right-handed (clockwise for tightening).Įvery cylinder includes a safety device to release pressure in high temperatures that might cause a dangerous condition. The cylinders are pressurized to 2,220 psi (pounds per square inch). Rusting of ferrous metals, discoloration of copper, and the corrosion of aluminum are all due to the action of atmospheric oxygen, known as oxidation.įor welding, oxygen cylinders are measured in cubic feet and come in 3 sizes (80, 122 and 244). The atmosphere is made up of approximately 21 parts of oxygen and 78 parts of nitrogen, the remainder being rare gases. In its free state, oxygen is one of the most common elements. It is nonflammable but will support combustion with other elements. Oxygen is a colorless, tasteless, odorless gas that is slightly heavier than air. ![]()
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