What is the forming process of Q345B spiral steel pipe?

Q345B spiral steel pipe is a steel pipe made of strip steel coil as raw material, often extruded and formed by automatic double-wire double-sided submerged arc welding. The raw materials are strip steel coils, welding wire, and flux. Strict physical and chemical tests are required before investment. The strip head and tail are butt jointed by single-wire or double-wire submerged arc welding, and automatic submerged arc welding is used for repair welding after coiling into steel pipe. Before forming, the strip undergoes leveling, edge trimming, edge planing, surface cleaning and conveying, and pre-bending treatment. Electric contact pressure gauges are used to control the pressure of the cylinders on both sides of the conveyor, so that the strip can be conveyed smoothly. Adopt external control or internal control roll forming.

During the forming process of the Q345B SSAW pipe, the steel plate should be uniformly deformed, the residual stress should be small, and the surface should not be scratched. Therefore, the steel plate for making the spiral steel pipe should be selected carefully and the surface should be uniform without scratches. The processed spiral steel pipe has great flexibility in the size range of diameter and wall thickness, especially in the production of high-grade steel-grade thick-walled pipes, especially small and medium-diameter thick-walled pipes. It has advantages that other processes can’t compare. It can satisfy users. There are many requirements in terms of spiral steel pipe specifications. The diameter and size range of spiral steel pipes should be flexibly mastered, using their own good advantages to meet the wide needs of multiple users, and spiral steel pipes can be popularized and promoted.