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ZY-76 BS standard pipe, BIS standard pipe, hot rolled steel pipe production line Raw material application HR steel, carbon and low carbon Production OD range(mm) 31.8-88.9 Production thickness range(mm) 1.2-3... Leggi di più

ZHANGJIAGANG ZHONGYUE WELDED PIPE MILL_MODEL ZY16 Technical and service advantage Pipe production is an industry which need qualified machine and experienced technology link together to produce the products, ... Leggi di più

Problem Small diameter tube makers often struggle to hold roundness and weld straightness when running Φ8-18mm pipe. A tiny cross-section amplifies any roller misalignment into visible ovality and a wandering ... Leggi di più

Final Size and Roundness Control After Welding The weld does not finish the tube — the sizing section does. Without enough sizing stands and a final straightener, welded tube leaves the line oval, bowed or off... Leggi di più

Premature Roll Wear and Dimensional Drift Roll and shaft wear is the hidden cost of tube production: as shafts wear, the pass opens up and OD, roundness and weld quality drift until the mill must stop for re... Leggi di più

Weld Bead and Heat Distortion After Welding The outside weld bead and residual heat are the two biggest threats to tube quality right after welding. A rough bead marks downstream rolls and ruins surface finish, ... Leggi di più

Cut-Length Drift and Saw Stoppage Buyers order fixed lengths and reject short or long pieces, so the flying saw must cut accurately while the line runs. Saw systems that lose sync with line speed produce off... Leggi di più

Costly Downtime During Roll Changeovers Every size change stops production, and on fixed-shaft mills operators must dismantle adjacent stands to reach a roll set. For mills running many φ10-26mm sizes in short ... Leggi di più

Problem When a mill is pushed to high speed, the strip becomes unstable. Coil changes stop the line, tension surges pull the weld seam off-center, and forming rollers heat up and shift, causing scrap and ... Leggi di più

Problem Older vacuum-tube welders waste energy, drift with temperature, and respond slowly to speed changes, producing inconsistent weld strength and higher electricity cost per ton of tube. Cause Vacuum-tube ... Leggi di più