Spiral welded pipe: It is made by rolling low-carbon carbon structural steel or low-alloy structural steel strips into pipe blanks at a certain spiral angle (called forming angle), and then welding the pipe seams. It can be made of narrower pipes. Strip steel produces large-diameter steel pipes. The
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(1) Pockmarking on the surface: Pockmarking is an irregular uneven defect on the steel surface caused by severe wear of the rolling groove. Because manufacturers of fake and inferior square steel tubing pursue profits, groove rolling often exceeds the standard;(2) Cracks are easy to occur: the reaso
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The All-China Federation of Industry and Commerce released the "2023 China's Top 500 Private Manufacturing Enterprises List" in Jinan on September 12. We are pleased to see that Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd. ranked 338th with a score of 25,750.71 millio
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There are four main common internal defects in rectangular square tubes: first, slag inclusion, which is an impurity phase or foreign particles surrounded by a solid metal matrix; second, decarburization, which is the surface layer of steel and iron-based alloy materials or parts. The phenomenon of
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TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD
