ERW Square/Rectangle Tube Mill a.Square Tube: 200*200- 450*450mm b. ... consists of uncoiler, pipe end opener, feeding machine, flattening mahcine, shear&welder, horizontal accumulator, forming&sizing mill, HF induction welder, ... machinery, conveyer table, hydro testing equipments, flattening test equipments, end facing&beveling machine, straightening testers, non-destructive testing equipments, ...