What is the production process of large diameter welded steel pipe? Next let’s take a look
1: Conduct physical and chemical inspection of raw materials such as strip steel coils, welding wires, and fluxes.
2: The head-to-tail butt joint of the strip steel adopts single-wire or double-wire submerged arc welding, and automatic submerged arc welding is used for repair welding after being rolled into steel pipes.
3: Before forming, the strip is leveled, trimmed, planed, surface cleaned, transported and pre-bent.
4: Use the electric contact pressure gauge to control the pressure of the oil cylinders on both sides of the conveyor to ensure the smooth conveying of the strip.
5: Use external control or internal control roll forming.
6: The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, misalignment and weld gap are strictly controlled.
7: Both internal welding and external welding use electric welding machines for single-wire or double-wire submerged arc welding, so as to obtain stable welding quality.
Post time: Apr-11-2023