Small knowledge about steel tubes

Welded pipe is divided into two kinds of seamless steel pipe and welded pipe according to the manufacturing method. Made of high quality carbon steel or alloy steel, hot-rolled, cold-rolled (drawn) branch. Welded pipe is rolled into a tube shaped steel plate to butt or spiral seam welding and, in the manufacturing method, voltage liquid transportation welded pipe, spiral welded pipe, directly welded pipe, welded steel pipe. Can be used for a variety of liquids, gas pipelines, etc.. Welding pipe can be used for water pipelines, gas pipelines, heating pipes, etc..
Seamless steel pipe according to the manufacturing method for hot rolling and cold drawing (rolling) tube tube. Cold drawing (rolling) maximum nominal diameter pipe is 200mm, hot rolled pipe nominal maximum diameter of 600 mm. In the pipeline project, the diameter of more than 57mm, often used in hot rolled tube, the diameter is less than 57mm when the common cold drawing (rolling) tube.
General seamless steel tube with ordinary carbon steel, made of high quality carbon steel, ordinary low alloy steel and alloy structural steel for making the transport of liquid pipeline or production structure, the parts used.
According to the outer diameter and wall thickness of the supply, in the same outside diameter has a variety of wall thickness, the pressure range is larger. Usually the hot-rolled tube length is 3-12.5m, cold drawing (rolling) tube for 1.5-9m.