Steel pipe used not only the for conveying fluid and solid powder, heat exchange, manufacturing machinery parts and containers, it is a kind of economy. Steel construction structure with steel truss, pillar and mechanical support, can reduce weight, save metal 20 ~ 40%, and can realize mechanized construction with steel pipe manufacturing factory. The highway bridge can not only save steel, simplify construction, and can greatly reduce the coated area, saving investment and maintenance costs.
According to the production method steel pipe can be divided into two categories: seamless steel pipe and pipe joints, pipe joints as welded steel pipe.
1. Seamless steel pipe according to the production method can be divided into: hot-rolled seamless pipe, cold drawing tube, precision steel tube, pipe, tube and pipe extrusion cold spinning.
Made of high quality carbon steel or alloy steel seamless steel pipe for hot rolling, cold rolling (drawing) of the points.
2. Welded steel pipe for different welding process and divided into the furnace pipe, welding (ERW) pipe and automatic arc welding, because of the different forms of welding seam welded pipe and spiral welded pipe is divided into two kinds, end its shape is divided into circular welded and shaped (square, flat) welded pipe.
The welded pipe is rolled into the steel tubular to sew or spiral seam welded in the manufacturing method, and divided into welded steel pipe for low pressure liquid delivery, spiral welded steel pipe, welded pipe directly welding steel pipe, seamless steel pipe and so on. Can be used in various sectors of the liquid pressure pipeline and gas pipeline pipeline welding. It can be used for water pipes, gas pipes, heating pipes, electrical and plumbing etc.
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