The pipe making machine in 2004,has passed ISO9001:200 Quality Managing- ... 2) Wallthickness of forming tubes:δ0.6—2.75mm3) Speed of forming tubes:20—65m/min4) Power of main ... Plain barrelled roll φ60mm,40Cr changing quality treatment,surface high frequence7) Vertical Rollφ35mm,40Cr changing quality treatment,surface ... in the near future!! GH45 straight seam and high frequency welded pipe making machine