Thick-wall spiral steel pipe refers to a spiral steel pipe whose wall thickness is slightly thicker than that of an ordinary spiral steel pipe.  Compared with the ordinary wall thickness spiral steel pipe, the advantages are: high compressive strength, high impact strength, high safety performance, and longer service life.  The implementation standards are 5037, 9711 and api.

 Thick-wall spiral steel pipe forming process

 1. Before forming spiral steel pipe

 The spiral steel pipe adopts the advanced double-sided submerged arc welding process, which can be welded at the best position, which is not prone to defects such as wrong edges, welding deviation and under-welding, and it is easy to control the welding quality and position.  The spiral steel pipe adopts a special welding process, which can be welded at the optimal welding position without any error defects, which can guarantee the qualification of the spiral steel pipe and the quality is well guaranteed.

 2. Spiral steel tube forming

 During the forming process of the spiral steel pipe, the steel plate should be deformed uniformly, the residual stress is small, and the surface should not be scratched. Therefore, the steel plate for the spiral steel pipe should be selected carefully, and the surface should be uniform without scratches.  The processed spiral steel pipe has greater flexibility in the range of diameters and wall thicknesses, especially in the production of high-steel grade thick-walled pipes, especially medium- and small-diameter thick-walled pipes. There are advantages that other processes cannot match, which can meet  Users have more requirements on the specifications of spiral steel pipes.  Spiral steel pipe diameter and size specification range should be flexibly grasped, taking advantage of its own good advantages, we have a wider demand for more users, spiral steel pipe can be popularized and promoted

 Thick wall spiral steel pipe development direction

 With the development of industry, the project has put forward higher requirements for the use of spiral pipelines. The reason why thick-wall spiral pipelines appear is because the pressure generated by some of the media that needs to be conveyed is unbearable by ordinary spiral steel pipes.  Straight seam steel pipe or seamless steel pipe will greatly increase the cost of the project. If it is a dangerous medium, we increase the cost is inevitable, so when selecting the pipeline, it is the medium and the pressure that the medium will generate according to the needs of the project.  decided.