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cold rolled big outside diameter steel pipe

cold rolled big outside diameter steel pipe, Large Diameter Seamless Steel Pipe, Large Diameter Steel Large diameter seamless steel pipe means outside diameter more than 100MM and the wall thickness is greater 0.2 than the outer diameter of the pipe, Largediameter seamless steel tube is made from solid tube ingot or the perforation capillary, then through hot rolling and cold rolling or cold dial. At present China's large diameter seamless steel pipe, the main production process is hotrolled

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