Production process: SSAW steel pipe is made of steel coil, with hot extrusion molding, then welded by automatic double-wire submerged arc welding process.

(1) The raw materials is strip coil, welding wire and flux. It must undergo strict physical and chemical tests before input.

(2) The head and tail of the steel strip are connected by single wire or double wire submerged arc welding. After being rolled into a steel pipe, automatic submerged arc welding is used for repair welding.

(3) The strip steel is leveled, trimmed, planed, surface cleaned and conveyed, and pre-bent before forming.

(4) The electric contact pressure gauge is used to control the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transportation of the steel strip.

(5) Use external control or internal control roll forming.

The main technological characteristics of SSAW steel pipe:

a. During the forming process, the steel plate is deformed uniformly, the residual stress is small, and the surface is not scratched. The processed spiral steel pipes have greater flexibility in the range of diameters and wall thicknesses, especially in the production of high-steel grade thick-walled pipes, especially small and medium-caliber thick-walled pipes, which have unparalleled advantages in other processes and can satisfy users. More requirements in terms of spiral steel tube specifications. 

b. Using advanced double-sided submerged arc welding process, welding can be achieved in the best position, it is not easy to appear defects such as wrong edges, welding deviation and under-welding, and it is easy to control the welding quality. 

c. Carry out 100% quality inspection on the steel pipe, so that the entire process of steel pipe production is under effective detection and monitoring, which effectively guarantees the product quality. 

d. All the equipment of the entire production line has the function of networking with the computer data collection system, realizing the real-time data transmission, and the technical parameters in the production process are controlled by the central control room.