As the manufacturing process is a steel tube with seam (Pipe-Welded) and stainless steel pipe seam (Pipe-Seamless), which is more than 90 percent of domestic steel pipe manufacturing is a type of steel pipe weld seam types by electricity (Electric Resistance Weld Pipe), such as black-steel pipe. Pipes, galvanized steel and stainless steel tube, which is used in various industries for stainless steel pipes, stitch type will be used for the oil industry. Gas and petroleum, which also must rely on imports, mainly because of the large investment required and the high production techniques.
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