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GB/T81622018 is a Chinese national standard that specifies the technical requirements, inspection rules, marking, packaging, and quality certificates for seamless steel pipes used for structural and mechanical purposes. The 235 refers to the minimum yield strength of the steel pipe is 235MPa.First,
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Coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes. A layer of plastic anti-corrosion layer or plastic anti-corrosion layer is fused to the inner surface of the steel pipe (bottom pipe) through spr
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Hot-rolled seamless steel pipe is a common pipe material that plays an important role in the steel industry with its excellent performance and wide range of applications. Whether in construction, machinery manufacturing, oil, natural gas, or other fields, hot-rolled seamless steel pipes play an indi
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1. Metalworking Process: During the manufacturing of seamless pipes, the metal is subjected to a process called extrusion or drawing. This involves forcing the metal through a die to achieve the desired diameter and wall thickness. The expansion process allows the metal to flow smoothly through the
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