Pipe and Tubes

Pipe and Tubes Pipes and tubes (Shown in Fig 1) are long hollow vessels that are used for a variety of purposes often for conveying materials, as a structural component or manufacturing equipment components like conveyor rollers and bearing casing etc.           Fig 1 Pipes and tubes The main difference between a pipe and a tube is the way the diameter of the pipe or tube is designated. Pipe is normally designated by a “Nominal Pipe Size” based upon the ID (inside diameter) of the most common wall thickness while the tube is designated by the measured OD (outside diameter). As an example a 20 mm steel pipe with 4 mm thickness has an OD of 28 mm while a 20 mm steel tube has an OD of 20mm. Tubes are often made to custom sizes and may often have a large number of specific sizes and tolerances than pipes. The term tube is also applied to non cylindrical shapes such as square tubes etc. Both pipes and tubes are associated with a level of rigidity and permanence while a hose is usually portable and flexible. Pipes and tubes are often classified by the material of the pipes. As per this classification pipes and tubes can be classified: Iron pipe such as cast iron pipe and ductile iron pipe Steel pipe such as carbon steel pipes, special steel pipes, alloy steel pipes and stainless steel pipes Type of coating such as galvanized pipe, aluminized pipe and chromium coated pipes etc. Copper and copper alloy (for example brass) pipes and tubes Aluminium and aluminium alloy pipes and tubes Plastic pipes and such as PVC, CPVC, PP, PEX, PB, ABS, HDPE and GRP pipes etc. Cement, Reinforced concrete and asbestos cement pipe...