Spiral-welded steel pipes for pressure fluid conveyance, using GB/T9711-2023 spiral seam submerged arc welding pipes, mainly used for oil and natural gas pipeline transportation.

Generally used for low-pressure fluid transportation, spiral-welded electric-resistance-welded steel pipes conforming to GB/T3091-2015 and SY/T5037-2023, manufactured by double-sided automatic submerged arc welding, are designed for transporting general low-pressure fluids such as water, gas, air, and steam.

Spiral steel pipes commonly follow standards such as: SY/T5037-2023 (Ministry Standard, also known as Spiral Welded Steel Pipe for General Fluid Transportation), GB/T3091-2015, GB/T9711-2023 PSL1 and PSL2 (National Standard, also known as Steel Pipe for Oil and Gas Industry Transportation, API-5L from the American Petroleum Institute, also known as Line Pipe; which includes PSL1 and PSL2 levels), and SY/T5040-2008 (Piling Spiral Welded Steel Pipe).

SY/T5037-2023 is commonly referred to as a ministry standard set by the Petroleum Department.

GB/T9711-2023 PSL1/2 Standard Spiral Steel Pipe for Oil and Gas Industry Transportation

Piling Spiral Welded Steel Pipe (SY5040-2008) is manufactured from hot-rolled steel strip coils, formed through normal temperature spiral process, and produced using double-sided submerged arc welding or high-frequency welding. It is used for steel pipes in civil engineering structures, docks, bridges, and other foundation piles.