Special introduction to Baotou seamless steel pipe knowledge and allowable deviation

Special introduction to Baotou seamless steel pipe knowledge and allowable deviation

Deviation level standardized outside diameter allowable deviation D1 ± 1.5%, minimum ± 0.75 mm D2 ± 1.0%. Minimum ±0.50 mm D3 ±0.75%. Minimum ±0.30 mm D4 ±0.50%. Minimum ±0.10 mm

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Seamless steel tube is a round, square, rectangular steel with a hollow section and no joints around it. Seamless steel tubes are made by punching steel ingots or solid billets and then hot rolled, cold rolled or cold drawn. Seamless steel tubes have a hollow cross-section and are used in a large number as pipes for conveying fluids. Compared with solid steel such as round steel, steel pipes have a lighter weight when subjected to the same flexural and torsional strength. They are economical cross-section steels and widely used in the manufacture of structures. Parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle racks, and steel scaffolding used in construction.

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