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Generally speaking, spiral steel pipes in one type of welded steel pipe in the pipe market, which are made by steel coil, extrusion forming under the normal temperature, and then undertake the manufacturing technology of double wire and double-faced submerged-arc welded in a mill. In the past, due to the method of manufacture, Spiral Welded pipe was relegated to low pressure and
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Spiral pipe with big diameter, high strength and practical features make it the first choice of many long-distance pipeline. With the spiral steel pipe rupture has a method for base metal and weld flattening test, guided bend test, a number of indicators of Analyses of magnetic field in spiral steel pipe Spiral Steel Pipe Spiral Steel Pipe direct from The long spiral steel pipe was welded together with a 6-m long and a 4-m long spiral steel pipe . One end of the long pipe was put up and formed a slope around 10°. The sphere rolled into one end of the long pipe and out from the other end, and the 8 Spiral Steel Pipe China Trade,Buy China Direct From 8 Spiral Steel Pipe Spiral Steel Pipe direct from Buy 8 Spiral Steel Pipe China Direct From 8 Spiral Steel Pipe Factories at . Help Global Buyers Source China Easily.