Cylinder Types and Specifications

While many cylinders are constructed of carbon steel, other materials such as aliuninum or stainless steels are also used. Sometimes the possibility of the gases reaction with the cylinder wall dictates the t) e of cylinder material specified. Some cylinders have special internal coatings to resist attack from corrosive gases or to provide a higher purity product. Cylinders for use with cryogenic liquids are constructed of special materials that will not lose their impact resistance at very low temperatures. 

Manufacturers of cylinders try to assure safety by complying with Department of Transportation regulations that govern the materials of construction, the service pressures, the capacities, and the testprocedines in accordance to the cylinders designs. Cylinders constmcted according to most DOT specifications may be allowed for use with a number of different gases, provided that it is filled properly and the correct safety devices are used in conjunction with the specific gas. 

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