1. During the molding process, the steel plate is uniformly deformed, the residual stress is small, and there is no scratch on the surface. The processed spiral steel pipe has more flexibility in the range of diameter and wall thickness, especially in the production of high steel grade thick-walled pipe, especially small and medium diameter thick-walled pipe, it has the advantages that other processes can not be compared to meet the needs of users.
2. The advanced double-sided submerged arc welding technology can realize the welding in the best position, and it is not easy to have the problems of edge error, welding deviation, welding defects and so on, which is convenient for the control of welding quality.
3. In order to make the whole process of steel pipe production to be effective detection and monitoring of the steel pipe to carry out 100% quality inspection, effectively guarantee the quality of products.
4. All the equipments of the whole production line have the function of networking with the computer data acquisition system to realize the real-time transmission of data, and the technical parameters in the production process are controlled by the central control room.
5. The raw materials are coils, wires and melts. They must undergo strict physical and chemical inspection before entering.
6. Stripped steel head and tail butt joints, single wire or double wire submerged arc welding, coiled into steel pipe, automatically submerged arc welding repair welding.
7. Before forming, the strip is leveled, trimmed, planed, surface cleaned, transported and pre-bent.
8. Control the pressure on both sides of the conveyor with electric contact manometer to ensure smooth transportation of the steel strip.
9. Adopt external control or internal control roller shape.
10. Adopt welding control device to ensure that the weld meets the welding requirements and strictly control the pipe diameter, dislocation and weld seam.
11. In order to obtain stable welding quality, the American Lincoln welder adopts single wire or double wire submerged arc welding for internal and external welding.
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