high frequency welded pipe making machine custom made as per customer's need high quality with competitive machine price HF Welded pipe making machine DescriptionZG12 tube mill lineZG16 tube mill lineZG25 tube mill lineZG28 tube mill lineDiameter of welded tubesΦ7-16mmΦ8-25mmΦ8-30mmΦ10-38mmWall thickness of welded tubes0.2-0.5mm0.3-1.0mm0.4-1.2mm0.6-1.5mmSpeed of tube welding30-100M/min30-90M/ ...