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Sep 06, 2016

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Pipes are used for pipes, pipe couplings and valve joins used for transporting gases, liquids or fluids with solid particles of the device. Normally, fluid blowers, compressors, pumps and boilers, pressurized, flow from the pipeline of high pressure and low pressure, pressure or gravity conveying of the fluid itself is also available. Pipe use is very extensive, mainly used in water supply, drainage, heating, gas supply, long distance transportation of oil and gas, agriculture, hydraulic engineering and industrial equipment.

When the fluid flow is known, the velocity of the tube diameter depends on the size of allowed or allowable friction (pressure drop). Velocity large diameter is small, but the pressure drop values increase. Therefore, the velocity, you will save pipeline infrastructure investment, operation of power equipment such as pumps and compressors increased energy costs. In addition, if the flow is too large, may also cause some other adverse factors. Pipe diameter should be based on investment, operating costs and other technical factors to consider the decision. Pipes, pipe couplings, valves and access on the device takes over the join method, by the nature of the fluid, pressure and temperature as well as the pipe material, size and installation location and other factors, mainly thread connection, flange connection, socket connections, and four methods of welding. Screw connection is mainly used in small-diameter pipes. Join, generally to fluoroplastic seals on the screw connection parts around, or coated with thick paint, round sealing materials such as hemp thread to prevent leakage. More than 1.6 MPa pressure, usually do many Beveling and gasket seal. This connection method is simple, and can be removed to reinstall, Union subject to the proper space in the pipeline to facilitate disassembly.