Transportation and Storage of Oxygen

the welding technique of oxygen - a key gas. Article about oxygen

Transportation and storage of oxygen
Oxygen from the air to receive special oxygen plants. Therefore, considerable importance is the transportation and storage of oxygen. Oxygen is usually stored and transported in gaseous form in steel cylinders under a pressure of 150 atm.

(1 - Cap 2 - valve, 3 - ring 4 - the neck, 5 - shoe)
Oxygen cylinder (see Fig.) is a steel cylinder with a spherical head and neck for attaching shut-off valve. At the bottom of the cylinder skewer shoe that allows you to put the bottle upright. On the neck of a ring with a threaded protective cap navertyvaniya. Internal Tapered neck vvertyvaniya needed to vent. Cylinders made ​​of seamless steel pipes carbon steel with a tensile strength not less than 65 kg / mm 2 , a yield strength of not less than 38 kg/mm2, and elongation of not less than 15%. Oxygen cylinders are made ​​for different purposes, 0,4-50 liters capacity. In the welding technique used mainly cylinders capacity of 40 liters. This cylinder has an outer diameter of 219 mm, 1390 mm ​​length of the body, the wall thickness of 7 mm, weighs balloon without oxygen about 60 kg. Weight cylinder of carbon steel for the working pressure of 150 atm to 1 liter capacity is 1.6-1.7 kg.

More recently begun commercial production of alloy steel cylinders, which makes it possible to increase the operating pressure of the cylinders and reduce their weight for the same capacity and pressure. To avoid dangerous mistakes when filling cylinders and use them for different gases are painted in different colors, in addition, connecting fitting shut-off valve has a variety of sizes and device. Oxygen cylinders are painted in blue on the outside and do them pa inscription in black letters, "Oxygen." Every five years, oxygen cylinder is subjected to mandatory testing, which is noted stamp, notch at the top of the spherical part of the cylinder. Produced the hydraulic test at one and a half working pressure, ie, at 225 atm

If any of the treatment with a balloon filled with oxygen under a pressure of 150 atm, an explosion may occur considerable destructive power. Therefore, when handling oxygen cylinders must adhere strictly to established safety rules. In the most responsible and dangerous workshops are advised not to make oxygen cylinders and place them outside the shop, in a separate annex, submitted to the department via the reduced oxygen low pressure, typically at 10.

Usually, the shop should not be at the same time more than ten tanks. The shop cylinders must be secured to a collar or chain wall, pillar stand, and so forth to eliminate the possibility of falling. At the plant containers should be transferred on a stretcher, or better, transported on special trucks, containers to carry on his hands is prohibited. In the carriage is recommended to use wooden pads to eliminate collision and rolling cylinders, rope, or ring, worn on the cylinders. Loading and unloading of containers should be done carefully, without jerks and shocks.

Cylinders must be protected from heat, such as a furnace, causing a dangerous rise in pressure of gas in cylinders. When working in the summer outdoors in sunny weather should cover the oxygen cylinders wet canvas. Do not allow contamination of the container, especially the valve oils and fats, which ignites spontaneously in oxygen, which can lead to an explosion cylinder. Oxygen cylinders should be stored in a designated individual stores. Transportation of oxygen gas in cylinders is expensive. Normal tank capacity of 40 liters, which weighs about 60 kg, capacity 6000 l = 6 m 3 of oxygen, weighing only 6 kg = 7.8 -1.3, so that the weight of 7.8 kg of payload to be transported container 60 kg m . is the tare weight of 88% and 12% of the payload. If we take into account maintenance, repairs and depreciation of cylinders, it is often the cost of oxygen on the spot by the consumer is much higher than its selling price at the oxygen plant. Treatment with oxygen requires strict adherence to safety rules. Oils and fats ignite spontaneously in contact with oxygen gas, which also gives explosive mixtures with combustible gases and vapors. Porous organic materials - peat, wood, cloth, etc., soaked in liquid oxygen form a powerful explosive - oksilikvity specifically used for blasting .

Oxygen cylinder valve made of brass. Connection nipple valve has the right pipe thread 3/4 ". When storing the valve is protected by a safety cap, which is shedding on the outer ring of the neck.

See also:
Gas Welding Technology
Transportation and Storage of Oxygen
When To Use Oxgen Gas Welding
Production of Oxygen from Air