Technology And Status Quo Of SSAW Steel Pipe

With the development of China's oil and gas industry, and especially the layout of the national energy pipeline network, the environmental protection requirements in rural areas have increased from time to time. As a result, the demand for SSAW steel pipes has increased,and the requirements for the localization of large-diameter, straight-seam steel pipes have become increasingly demanding. The West-East Gas Pipeline Project is a national standard project and requires 1.82 million tons of large diameter submerged arc welded steel pipes, of which 820,000 tons are large-diameter SSAW steel pipe.

With the development of the economy, experts in the steel pipe industry have assessed that the proportion of long-distance pipelines for straight seam steel pipes in China is 20%, while the reverse is true in foreign countries. The improvement of everyone’s understanding, especially the emphasis on safety, and the improvement of engineering design specifications, has increased the proportion of large-diameter straight seam steel pipes in China’s newly-built oil and gas pipelines. Main equipment and process for producing large diameter straight seam steel pipe.

Steel plate edge milling machine: The two sides of the sheet material for pipe making are machined, and the two plate edges are processed into the desired form at one time. And to make the parallelism of the two sides within the specified tolerance range, to prepare for the manufacture of high-precision steel pipe.

Pre-bending machine for steel plate: Pre-bending is carried out on the side of the steel plate where the edge milling machine processes both sides of the welding groove.

To prevent the molding machine from forming a long straight edge in the formed steel pipe, so that the plate edge of the steel plate has a radius of curvature equal to that of the steel pipe. Ensure the roundness of the steel plate.Full-automatic steel pipe forming machine: completes the bending and forming of various metal sheets.

Steel pipe pre-welder: Form the qualified open billet by the molding machine, and perform further welding and pre-welding. Prepare for internal and external welding.

Double wire internal welding machine: It is used for automatic submerged arc welding of large diameter straight seam steel pipe, and the welding car transports workpieces along the track. With the host to achieve the welding of the workpiece.

Steel Tube Finishing Machine: The round tube with poor roundness is subjected to strong pressure from the outside in order to change the roundness of the steel tube. To meet the relevant specifications and use requirements.Gantry mobile sensory straightening machine: used for the straightening of steel cylindrical tubes.

Straight seam steel pipe flat chamfering machine: chamfers the straight seam steel pipe end according to the specified blunt edge and groove angle.Improve the pipe size accuracy, steel pipe expander: eliminate stress.3000T Hydrostatic Tester: Hydrostatic test of the welded pipe. Eliminating welding stress and forming stress, inspecting steel pipes for permeation defects under specified pressure.

To ensure the use of steel pipe performance.Able to detect vertical and horizontal defects and thermal impact differentiation layers. Line ultrasonic testing equipment: 100% line ultrasonic non-destructive testing of all welds.

A worker from a steel pipe company, which is located in China.