Spiral steel pipes are mainly used in tap water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, and urban construction. They are one of the 20 key products developed. For liquid transportation: water and drainage. For gas conveying: gas, vapor, liquefied petroleum gas. Structural use: pile tube, bridge; docks, roads, building structure pipes, etc.
The main process characteristics of the spiral steel pipe
1. During the molding process, the steel plate is uniform, the residual stress is small, and the surface is not scratched. The processing spiral steel pipes have greater flexibility in the size of the diameter and wall thickness. Especially in the production of high -steel thick wall tubes, especially small and medium -caliber thick wall pipes, it has the advantages of other craftsmanship, which can meet users. More requirements for the specifications of spiral steel pipes.
2. Adopt advanced double -sided buried arc welding process, which can achieve welding in good positions. It is not easy to cause defects such as wrong edges, welding bias and unproof, and easy to control welding quality.
3. The quality inspection of 100%of the steel pipe is performed, so that the entire process of steel pipe production is effectively inspected and monitored, and the product quality is effectively guaranteed.
4. All equipment of the entire production line has the functions of connected to the computer data acquisition system to realize the real -time data transmission. The central control room has the technical parameters in the production process.
5, raw materials, with steel rolls, welded wires, welds. Strict physical and chemical tests must be passed before the investment.
6. Bring steel head and tail docking, single -silk or dual -wire buried arc welding, after rolling into steel pipes, use automatic buried arc welding to replenish welding.
7. Before forming, the tissue is clear, cut, and planed, and the surface is cleaned and transported on the surface.
8. Use the electric connection point pressure gauge to control the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transportation of the steel.
9. Use external or internal control roller type.
10. Use the weld gap control device to ensure that the weld gap meets the welding requirements. The pipe diameter, the error edge amount and the weld gap are strictly controlled.
11. Internal welding and outer welding are used in the United States Lincoln welding machine for single or double wire buried arc welding to obtain a stable welding quality.
