Cangzhou DoubleDragon Steel Pipe Co., Ltd., based in China, specializes in manufacturing helical seam pipes ranging from 8 to 140 inches in diameter and 6 to 26mm in wall thickness. Additionally, we offer options for coating and lining. With thirty years of experience, we offer expertise in production. We invite global friends to connect and inquire.

Before the production of large-diameter spiral steel pipes, the strip is fed into the welded pipe unit and rolled by multiple rollers, and the strip is gradually rolled up. To form a circular tube blank with an opening gap, the roller reduction amount should control the weld gap to 1~3mm, and align both ends of the weld. The coiled plate is spirally formed by the forming machine, followed by internal and external submerged arc welding, and then spirally welded steel pipes of different standards and diameters are processed.

Characteristics and standard classification of large-diameter spiral welded steel pipes: large-diameter spiral welded steel pipes for pressure-bearing fluid transportation are mainly used in pipelines for transportation of oil and natural gas; spiral seam high-frequency welded steel pipes for pressure-bearing fluid transportation), with high-frequency lap welding Legal, large-diameter spiral welded steel pipe used for transporting pressurized fluids.

There should be a certain channel between the stacks of large-diameter spiral welded steel pipes, and the width of the inspection channel is generally about one meter. The width of the access channel depends on the size of the material and the conveying machine, usually one and a half to two meters.