![]() ASTM A213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, Heat-Exchanger Tubes.Many standards exist for tube manufacture some of the most common are as follows: There are many industry and government standards for pipe and tubing. Drawn-over-mandrel tubing is made from cold-drawn electrical-resistance-welded tube that is drawn through a die and over a mandrel to create such characteristics as dependable weld integrity, dimensional accuracy, and an excellent surface finish.Seamless tubing is produced via extrusion or rotary piercing. ![]() There are three classes of manufactured tubing: seamless, as-welded or electric resistant welded (ERW), and drawn-over-mandrel (DOM). The actual dimensions of pipe are usually not the nominal dimensions: A 1-inch pipe will not actually measure 1 inch in either outside or inside diameter, whereas many types of tubing are specified by actual inside diameter, outside diameter, or wall thickness. A tube and pipe may be specified by standard pipe size designations, e.g., nominal pipe size, or by nominal outside or inside diameter and/or wall thickness. Both pipe and tube imply a level of rigidity and permanence, whereas a hose is usually portable and flexible. The terms " pipe" and "tube" are almost interchangeable, although minor distinctions exist - generally, a tube has tighter engineering requirements than a pipe. JSTOR ( July 2008) ( Learn how and when to remove this template message)Ī tube, or tubing, is a long hollow cylinder used for moving fluids ( liquids or gases) or to protect electrical or optical cables and wires.Unsourced material may be challenged and removed.įind sources: "Tube" fluid conveyance – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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