... from 8mm up to 114mm. HG20-114 High Frequency Welded Pipe Machine High frequency welded pipe machine uses roll forming theory to coil long steel ... rectangular pipeWall thickness0.4-1.25mm0.5-2.5mm0.6-3.25mm0.8-3.5mm1-4mm1-4.5mm1.5- ... welder,storing device,forming and sizing unit,flying saw,straightener,end milling equipment,hydrostatic testing machine,charge table,sack&bale machine,high frequency DC ...