20 # hot expanded seamless steel pipe

Hot expanded seamless steel pipe is commonly referred to as hot expanded pipe. Steel pipes with low density but strong shrinkage (seamless steel pipe) can be abbreviated as hot expanded pipe. Expanding the diameter of a pipe using the oblique rolling or drawing method

The precision rolling process for cultivating waste pipes. Thickening steel pipes in a short period of time can produce non-standard and special types of seamless pipes with low cost and high production efficiency, which is currently the development trend in the international pipe rolling field.

The current production standards for heat expansion tubes in China are:

Hot expanded seamless steel pipe: GB3087-1999

Hot expanded seamless steel pipe (seamless steel pipe): GB/T3091-2000.