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The process flow and characteristics of rolling and honing pipes

(1) The raw materials are steel strip coil, welding wire and flux. They must undergo strict physical and chemical inspections before being put into use.

(2) For the head-to-tail butt joint of steel strip, single-wire or double-wire submerged arc rolling and honing pipe welding is used, and automatic submerged arc welding is used for repair welding after being rolled into steel pipes.

(3) Before forming, the strip steel is leveled, trimmed, planed, surface cleaned, transported and pre-bent.

(4) Electric contact pressure gauges are used to control the pressure of the cylinders on both sides of the conveyor to ensure smooth conveying of the strip.

(5) Adopt external control or internal control roller forming.

(6) The weld gap control device is used to ensure that the weld gap meets the eight new cold rolling production lines. The production specifications are: outer diameter 12mm-219mm, wall thickness 1.5mm-35mm, cold-rolled precision steel pipes with smooth appearance, uniform wall thickness, and high precision.

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