The production process of high-frequency welded pipe mainly depends on the variety of products. From raw materials to finished products needs to go through a series of processes, and the completion of these processes requires a variety of mechanical equipment and welding, electrical control, detection devices. These equipment and installation in accordance with the different process requirements a variety of reasonable layout.
Taking ERW steel pipe as an example, typical production process of high frequency welded pipe is shown below:
Uncoiling – Leveling – End cutting – End shearing and butt welding – Spiral loop/accumulator – Edge cutting/Edge milling – Ultrasonic detection – Forming – High frequency welding + Burr removing – Welding seam ultrasonic detection (offline online) + Metallographic examination – Medium frequency heat treatment – Air cooling – Water cooling – Sizing – Fly cutting – Flush out – Cutting/Cropping – Flattening testing – Straightening – End facing and bevelling – Hydrostatic testing- Ultrasonic detection for welded seam and pipe end – Marking and coating – Finished product