Large diameter spiral steel pipe manufacturer for buried anti-corrosion spiral steel pipe

Description :

　　Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often formed by warm extrusion, and welded by automatic double wire double-sided submerged arc welding process. Spiral steel pipes feed the strip steel into the welded pipe unit, where it is rolled by multiple rollers and gradually rolled up to form a circular billet with open gaps. The pressing amount of the extrusion roller is adjusted to control the weld seam gap between 1-3mm and ensure that both ends of the weld are level.

　　Chinese name: Spiral steel pipe, foreign name: Spiral steel pipe. Raw material: strip steel coil. Production method: room temperature extrusion molding.

　　Main process characteristics of spiral steel pipe:

　　a. During the forming process, the steel plate deforms uniformly, with minimal residual stress and no scratches on the surface. The processed spiral steel pipes have greater flexibility in the size specifications of diameter and wall thickness, especially in the production of high-grade thick walled pipes, especially small and medium-sized thick walled pipes, which have unparalleled advantages compared to other processes and can meet more requirements of users in terms of spiral steel pipe specifications.

　　b. By adopting the double-sided submerged arc welding process of Xian Jin, welding can be achieved at the optimal position, which is less prone to defects such as misalignment, welding deviation, and incomplete penetration, and easy to control the welding quality.

　　c. The quality inspection of steel pipes ensures that the entire production process is under effective testing and monitoring, effectively guaranteeing product quality.

　　d. All equipment on the entire production line has the function of networking with the computer data acquisition system to achieve real-time data transmission, and the technical parameters during the production process are controlled by the central control room.

　　Standard classification:

　　Pressure fluid transportation, using spiral seam submerged arc welded steel pipe SY5036-2000, mainly used for pipelines transporting petroleum and natural gas;

　　Spiral seam high-frequency welded steel pipe SY5038-2000 for pressurized fluid transportation, welded by high-frequency lap welding method, used for spiral seam high-frequency welded steel pipe for pressurized fluid transportation. Steel pipes have strong pressure bearing capacity, good plasticity, and are easy to weld and process into shapes;

　　For general low-pressure fluid transportation, spiral seam submerged arc welded steel pipe SY5037-2000 is used, which is made by double-sided automatic submerged arc welding or single-sided welding method and is used for general low-pressure fluid transportation such as air and steam.

　　The commonly used standards for spiral steel pipes are generally divided into: SY/T5037-2008 (departmental standard, also known as spiral seam submerged arc welded steel pipes for ordinary fluid transportation pipelines), GB/T9711.1-2008 (national standard, also known as technical delivery conditions for petroleum and gas industry transportation steel pipes, part of the technical conditions for delivery: A-grade steel pipes (GB/T9711.2B grade steel pipes with strict requirements)), API-5L (American Petroleum Institute, also known as pipeline steel pipes); It is divided into two levels: PSL1 and PSL2, and SY/T5040-2008 (spiral welded steel pipes for piles).

AfterSalesService :

• Anti corrosion spiral steel pipe