Stainless Steel welded tubes

PROCESS OF MANUFACTURE : (A) AS-WELDED PIPES
                                                 (B) SEAMLESS OR WELDED COLD DRAWN TUBES/PIPES

Manufacturing of Stainless Steel welded tubes and pipes commences with the formation of welded mother tubes / pipes on continuous tube mill from prime prime quality stainless steel strips, using the latest TIG welding technique for superior weld quality and 100% fusion. Argon purging is used to prevent any contamination of the welded area of the tube. These tubes are then annealed at 1050 degree Celsius - 1100 degree Celsius in continuous annealing furnace followed by immediate water quenching to prevent chromium carbide precipitation. Then these tubes are straightened in straightening machine. Finally these tubes are pickled in a picking solutions made of Nitric Acid and Hydrofloric Acid. This removes the scales formed during annealing . These tubes are checked by quality control people for checking all the parameters.