Spiral welded pipe(or helical welded pipe)is cold formed from hot rolled coil and submerged arc welded in a single,continuous process.It is to roll the low carbon structural steel and low alloy steel strip to tube according to certain helix angle,and then welded pipe joints.The spiral welding process is efficient,flexible,cost efficient and is customizable for very large diameters or long lengths with various levels.

OD508MM SCHXS Q345 20 meter spiral welded pipes

Advantages of spiral welded pipe:

(1) Steel pipes of the same width can be used to produce steel pipes of different diameters, especially for producing large diameter steel pipes with narrow strip steel.

(2) Under the same pressure conditions, the spiral weld is subjected to less stress than the straight seam, which is 75% to 90% of the straight seam welded pipe, and thus can withstand a large pressure. Compared with the straight seam welded pipe of the same outer diameter, the wall thickness can be reduced by 10% to 25% under the same pressure.

(3) The size is accurate, the general diameter tolerance is not more than 0.12%, the deflection is less than 1/2000, and the ellipticity is less than 1%. Generally, the sizing and straightening process can be omitted.

(4) It can be continuously produced. In theory, it can produce infinitely long steel pipes, with small loss of cutting head and tail cutting, which can improve the utilization rate of metal by 6% to 8%.

(5) Compared with the straight seam welded pipe, it is flexible in operation and easy to change the variety.

(6) The equipment is light in weight and has low initial investment. It can be made into a trailer-type mobile unit, and the welded pipe can be directly produced at the construction site where the pipeline is laid.

(7) It is easy to realize mechanization and automation.

OD323.9 SCH20 P245GH 12meter spiral welded pipe

Disadvantages of spiral welded pipe:

Due to the use of coiled steel as raw material, there is a certain crescent bend, and the welding point is in the elastic strip edge area, so it is difficult to align the welding torch and affect the welding quality. To do this, set up complex weld tracking and quality inspection equipment.

Haihao Group manufacture&supplier&export spiral welded pipes in the range from 18″ to 104″ with maximum wall thickness of 1″(25.4mm) conforming to BIS/API/ASTM specifications upto API5L,Gr.X80.If you want to know more about our piping products(steel pipes,butt welding pipe fittings,forged pipe fittings,forged flanges),please email us:sales@haihaogroup.com