Welded steel pipe also known as welded pipe, it is cut from the steel strip into a narrow strip,then cold proces-sed with a mold wrapped into a tube. Then the special welding machine welds a pipe seam. The outer weld is polished bright. The general pipe does not hit the burr. Only the precision welded pipe hit the burr.
Anti-corrosion points: welded steel pipe is bent with steel or steel plate into round, square and other shapes and then welded into steel pipe,which has welds in the surface. According to different welding method,it can be divided into arc welding pipe, high frequency or low frequency resistance welded pipe, gas pipe, furnace pipe, Bundy tube etc.
According to the shape of the weld,it can be divided into straight welded pipe and spiral welded pipe. Welded steel pipe is used for oil drilling and machinery, manufacturing and so on. Furnace welded pipe can be used for water and gas pipes, large diameter straight welded pipe can be used for high pressure oil and gas trans-portation; spiral welded pipe can be used for oil and gas transportation, pipe piles, piers and so on. Welded steel pipe is less costly than seamless steel pipe and it has high production efficiency.
