Hot-expanded seamless pipe is a hot-expanded pipe that we often say. A pipe with a relatively low density but a strong contraction can be referred to as a heat-expanded pipe. A paddle finish rolling process in which the diameter of the pipe is enlarged by a cross-rolling or drawing method. The thickening of steel pipes in a short period of time can produce non-standard and special models of seamless pipes with low cost and high production efficiency. It is the current trend in the field of international pipe rolling.
China's current thermal expansion seamless pipe production standard hot-spread seamless steel pipe: GB3087-1999
Hot expanded seam steel pipe (seamless steel pipe): GB/T3091-2000.
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