The,common,used,welded,steel,p business, insurance The common used welded steel pipe
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Welded pipe is the common pipe material used in the gas pipeline. Generally speaking,the tube whose diameter greater than 426 mm (or 508 mm) is called the large diameter welded pipe.According to the welding methods of tube,it can be divided into two kinds:spiral welded pipe and straight seam welded pipe.But the seamless steel pipe accounts for a bigger part.Straight seam welded pipeafter the hot rolled plate coil is molded by the molding machine,make the deformation of steel coil to smooth cylinder, using the skin effect,proximity effect and eddy current heating effect of high frequency current to weld,to make the edge of tube billet heated to melt, and fusion under certain extrusion effect,cooling forming finally.And for the edge of tube billet by using high frequency current melting is known as the high frequency straight seam steel pipe (ERW steel pipe), using arc melting is known as the straight seam submerged arc welding pipe (LSAW steel pipe).The main raw material of straight seam welded pipe is low carbon steel hot-rolled coil, hot rolled band,which are widely used in oil and gas transportation, low pressure water gas, mine fluid conveyor, belt conveyor roller, auto transmission shaft, etc in the industries petroleum, metallurgy, construction, coal mine, port, machinery and others.
The,common,used,welded,steel,p