Pipeline is made of pipe, pipe couplings connection and used for the transport gas, liquid or solid particles of the fluid with the device. Typically, the fluid by the blowers, compressors, pumps and boilers and other pressurized, from the high pressure of pipeline flow the low pressure point, can also use their own pressure or gravity fluid delivery. Pipeline is so widely used, mainly used in water supply, drainage, heating, gas supply, long-distance transportation of oil and gas, agriculture, irrigation, hydraulic engineering, and a variety of industrial devices.
The pipeline is commonly used pipe API 5L standtard, China's current commonly pipeline has submerged arc welded pipe (SSAW), LSAW pipe (LSAW), resistance welding pipe (ERW). When the diameter less than 152mm,seamless steel pipe will be a choice.