Straight seam welded pipes are mainly produced by double-sided submerged arc welding. After bending, seaming, internal welding, external welding, straightening, flattening and other processes, the products meet the relevant standard requirements. They are the best choice for large-scale pipeline projects, water and gas transmission projects, and urban pipeline construction. The national West-East Gas Transmission uses 200,000 tons of this type of steel pipe, and the market prospects are broad.

The straight seam submerged arc welded pipe products comply with the low-pressure fluid steel pipe standard of GB/T3091-2015, the petroleum and natural gas pipeline implementation standard of GB/T9711-2023, and the American implementation standard of ASTM A252 welded structural steel pipe. The production process of straight seam submerged arc welded pipe is flexible and can produce any specifications and wall thickness within the production range. The production efficiency is lower than that of high-frequency straight seam welded steel pipe and spiral welded steel pipe. They shine on that they can produce specifications and models that high-frequency steel pipes, spiral steel pipes, and even seamless steel pipes cannot produce. Straight seam welded pipes can produce materials that high-frequency steel pipes and spiral steel pipes cannot produce. For example, high-frequency steel pipes are usually produced in common domestic specifications and mass-produced for inventory. The materials are usually Q235B, Q355B. Straight seam submerged arc welded pipes are widely used in domestic heavy steel structure projects, fluid pipeline projects, and foundation piling projects.

Executive standards: GB/T3091-2015 and GB/T9711-2023 standards are generally adopted in China.

Common materials: Q235A, Q235B, 16Mn, 20#, Q355B. L245. L290. X42. X46. X70. 0Cr13. 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni1 1Nb#.

Main uses: For liquid transportation: water supply, drainage, sewage treatment projects, mud transportation, marine water transportation.

Transport gas: coal gas, steam, liquefied petroleum gas.

structural use: as piling pipes, bridges; pipes for docks, roads, building structures, marine piling Pipes, etc.