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

General low-pressure fluid transmission, spiral-welded steel pipes in accordance with GB/T3091-2015, SY/T5037-2023, manufactured by double-sided automatic submerged arc welding for the transmission of general low-pressure fluids such as water, gas, air, and steam.

Common standards for spiral steel pipes generally include: SY/T5037-2023 (industry standard, also known as Spiral Submerged Arc Welded Steel Pipe for General Fluid Transportation), GB/T3091-2015, GB/T9711-2023 PSL1 and PSL2 (national standard, also known as Steel Pipe for Petroleum and Natural Gas Industry Transportation, API-5L [American Petroleum Institute, also known as Pipeline Steel Pipe; divided into PSL1 and PSL2 grades]), and SY/T5040-2008 (screwed steel pipe for pile usage).

SY/T5037-2023 is a general standard set by the Petroleum Department, often referred to as the Ministry Standard.

GB/T9711-2023 PSL1/2 Standard Spiral Steel Pipe, used for oil and gas industry transportation.

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