LSAW steel pipe supply

Manufacturing method of large-diameter LSAW steel pipe production process

The existing large-diameter welded pipe production process is usually (1). Ultrasonic testing of plates; flame cutting and blanking; (3). Uniform edge "4). Pre-bending; (5). Forming; (6). Welding; (7). Internal welding; ⑶. External welding; (10). Correction; (11). Steel pipe flaw detection; （12） Lateral shift; (13) Inspection. After the steel pipe is welded, the longitudinal weld formed is higher than the pipe The surface of the body. The large-diameter steel pipes used in the construction industry have higher requirements for appearance quality, such as appearance geometry, flatness, etc. Therefore, the welds need to be ground and smoothed.