Large-diameter straight seam steel pipe process and equipmen

Foreign long-distance pipeline straight seam steel pipes accounted for 80% of the United States on the contrary, is currently only 20%, but with the economic development, we increased awareness, especially the emphasis on safety, as well as engineering design specifications to improve U.S. New oil pipelines, large diameter straight seam steel pipe applications increasing over time. 
Large-diameter straight seam steel pipe process and equipment 
Time two plates edge is processed into the desired form, the steel sheet edge milling machine: both side surfaces of the pipe making sheet to be machined, and two board edges parallel degree reaches a predetermined tolerance range, for the manufacture of a high-precision steel pipe preparation. 
Steel plate board edge with a steel plate molding steel pipe radius equal to the radius of curvature, steel pre-crimping machine: Milling machining pre-curved edge of the the welding groove on both sides of the steel plate. Prevent molding machine molded steel pipe produce long straight edge, to ensure the roundness of the steel sheet. 

Automatic Steel Tube Forming Machine: Complete molding on a variety of sheet metal bending. 
Further commissure and presoldering steel pipe Pre welder: molding machine qualified opening tube, prepare for the inner and outer weld. 
Welding car transporting workpiece walking along the track, double wire welder: for large-diameter straight seam steel pipe automatic submerged arc welding, with the host of workpiece welding. 
Welding car transporting workpiece walking along the track, double wire outside the welder: for automatic submerged arc welding straight seam steel pipe, with the host of workpiece welding. 
To change the pipe roundness, pipe finishing machine: the long tube of the poor roundness piecewise exert strong pressure from the outside, so as to achieve the relevant specifications and usage requirements. 
Of Gantry Moving senses leveler: for steel cylindrical tube straightening. 
Straight seam steel flat head chamfering machine: straight seam steel pipe ends according to the provisions of the blunt edge and bevel angle chamfering. 
Improve the steel pipe dimensional accuracy. Steel pipe expanding machine: eliminate stress. 
The penetration defect and whether the check steel pipe provisions pressure 3000T hydraulic test machine: hydrostatic testing of welded pipe. To eliminate the the welded stress and molding stress, in order to ensure the steel pipe using performance. 
Longitudinal, transverse defects and heat affected zone stratified defects can be detected. Line ultrasonic testing equipment: 100% whole weld line ultrasonic nondestructive testing. 
Rural environmental requirements from time to time, with the development of China's oil and gas industry. In particular, the U.S. national energy pipe network layout, making LSAW steel pipe demand growing, large-diameter straight seam steel pipe production requirements in the United States is growing. West-East 'project is the U.S. standard engineering needs large diameter submerged arc welded pipe 1.82 million tons, including 820,000 tons of large diameter LSAW steel pipe single only part of the U.S. production of steel pipes.  

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