Welding method of Q235B spiral pipe

- May 22, 2019-

Welding method of Q235B spiral pipe

Pipeline is a kind of commonly used construction material, which is used in both factory and home buildings. For example, double-sided submerged arc welded steel pipe, submerged arc welded spiral pipe and Q235B spiral pipe are common pipeline types.Q235B spiral tube is a commonly used material in spiral tube.It is a spiral welded steel tube with strip steel coil as raw material, which is often shaped by warm extrusion and welded by automatic double wire and double submerged arc welding process.



Q235B spiral tube featuresStraight welded pipe production process is simple, high production efficiency, low cost, rapid development.The strength of spiral welded pipe is generally higher than that of straight welded pipe. The welded pipe with larger diameter can be produced with narrower billet, and the welded pipe with different diameter can be produced with the same width billet.However, compared with straight seam tubes of the same length, the weld length increases by 30-100%, and the production speed is lower.Therefore, the welding pipe with smaller diameter mostly adopts straight seam welding, while the welding pipe with larger diameter mostly adopts spiral welding.


The company covers an area of 300,000 square meters, construction area of 60,000 square meters, registered capital of 56 million yuan, total assets of 220 million yuan.Company has four production lines of double-sided submerged arc welding of spiral steel pipe, an annual output of 219-3600 * 6-40 mm Φ steel pipe 200000 tons;High frequency straight seam steel pipe production lines, two years production Φ 219-820 * 6 mm to 30 mm steel pipe 120000 tons.Is the production of Q235, Q345, X52, X60 and other special models, special materials of high quality spiral steel pipe and straight seam steel pipe.In particular, double-sided submerged arc welding steel pipe, 16 manganese spiral steel pipe, submerged arc welding spiral pipe, Q235B spiral pipe by the vast number of users of consistent praise, the amount is also particularly large.Product execution standards: 5037, 5040, 9711.1, 9711.2.


The company's products are widely used in Marine facilities, petrochemical, construction and other industrial and mining enterprises of steel structure equipment, all kinds of tanks, pipes and other steel pipes.The company adopts all the current advanced production equipment and Lincoln automatic submerged arc welding machine, and is equipped with online digital ultrasonic flaw detector, hydrostatic pressure, testing machine, X-ray real-time imaging, universal material testing machine, charby material impact testing machine and other complete quality inspection instruments.The company's products have been inspected by "China petroleum industry special pipe quality supervision and inspection center", and all of them are up to standard.Below youfa steel pipe manufacturing on the Q235B spiral pipe welding and cutting methods to give you a detailed introduction.


The finished welds were inspected by the on-line continuous ultrasonic automatic flaw detector, ensuring 100% coverage of the spiral welds in nondestructive testing.If there are defects, automatic alarm and spray mark, production workers according to this at any time to adjust the process parameters, timely eliminate the defects.After the steel pipe is cut into single steel pipe by air plasma cutting machine, each batch of steel pipe shall be subject to strict first inspection system to check the mechanical properties, chemical composition, melting state, surface quality of steel pipe and nondestructive inspection to ensure that the pipe manufacturing process is qualified before it can be formally put into production.The part marked by continuous acoustic wave inspection on the weld shall be subject to manual ultrasonic inspection and X-ray reexamination. If there is any defect, it shall be subject to nondestructive inspection again after repair until the defect is confirmed to be eliminated.Each steel tube is hydrostatic tested and the pressure is sealed in radial direction.


Product Description
Erw steel pipe / Welded steel pipe
API 5L, API 5CT, ASTM A53,EN 10219,EN10217,JIS G3444
GR.A-X70, N80, Q195-Q345, ST35-ST52
Plain,Beveled,Thread with Coupling or cap,Chamfer,Groove ,Screw
Detailed Images
Packing & Delivery

ISO 14001.

Environment management system certification


National quality management system certification


Occupational health and safety management system certification

Quality Control
Product Device
Factory Show

Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.

No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.

With the sense of responsibility, customer-centered, market-oriented, service-oriented, spot supply as the main body, good reputation, excellent business quality, integrity, conscientious work, perception of society and the spirit of Bianjin, we are committed to creating a win-win, easy and convenient large-scale integrated steel procurement for customers Platform.

The company upholds the enterprise tenet of integrity-based and customer-oriented, constantly strengthens internal management and builds an elite team, and will: all for users throughout the whole process of economic management, for this purpose, to provide customers with high-quality products and excellent services.