Large Diameter Seamless Pipe

Large-diameter seamless steel pipe, the main production process for hot rolling of large diameter seamless steel tube and thermal expansion diameter seamless steel tube, thermal expansion can produce the gb size seamless steel tube, thermal expansion of seamless tube is we often say that the heat expansion tube, the density is low but the contraction strong steel pipe with method of skew rolling or drawing method to expand the pipe diameter of a waste pipe finishing process.