HRF Welding Tube Pipe Production Line,Welded tube mill
HRF Welding Tube Pipe Production Line,Welded tube mill. English Español. ... while the large diameter welded pipes are mostly spiral welded. 3.Spiral tube material: Q235A, Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. ... → uncoiling →material accumulating → non-power leveling →mill-forming → high-frequency welding ...
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