钢管的分类（Classification of steel tubes）.docVIP

钢管的分类（Classification of steel tubes） Classification of steel tubes Classification by production methods The steel pipe can be divided into two kinds according to the production method: seamless steel tube and welded steel pipe. 1. seamless steel tube according to the production methods can be divided into: hot-rolled seamless pipe, cold drawn tube, precision steel tube, heat expansion tube, cold spinning tube and extrusion tube. Seamless steel tubes are made of quality carbon or alloy steel, There are hot rolling, cold rolling (pull) points. 2. because of its different welding process, welded steel pipe is divided into furnace pipe welding, welding (resistance welding) pipe and automatic arc welded pipe, because of its different forms of welding, divided into longitudinal welded pipe and spiral welded pipe two, Because of its end shape is divided into round welded pipe and special-shaped (square, flat, etc.) welded pipe. The welded pipe is rolled into the steel tubular to sew or spiral seam welded in manufacturing methods, It can be divided into welded pipe for low pressure fluid transportation, spiral seam welded steel pipe, direct roll welded steel pipe, electric welding pipe, etc.. Seamless steel pipe can be used in all kinds of liquids, gases, pipes and so on. Welded pipes can be used for transportation Water pipes, gas pipes, heating pipes, etc.. Sort by material Steel pipe according to the pipe material (ie steel) can be divided into: carbon tube and alloy tube, stainless steel tube. Carbon tube can be divided into ordinary carbon steel tube and high quality carbon structure tube. The alloy tube can be divided into: low alloy pipe, alloy pipe structure, high alloy tube, high strength tube. Bearing tube, heat resistant acid resistant stainless pipe, precision alloy (such as cutting alloy) pipe, high temperature alloy tube, etc.. Sort by connection The connection way of steel pipe can be divided into: light pipe (pipe end without thread) and wire tube (Guan Duan