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

General low-pressure fluid transmission: Spiral seam submerged arc焊接钢管 according to GB/T3091-2015, SY/T5037-2023, manufactured using double-sided automatic submerged arc welding for the transmission of general low-pressure fluids such as water, coal gas, air, and steam.

Common standards for spiral steel pipes generally include: SY/T5037-2023 (Ministry Standard, also known as Spiral Submerged Arc Welded Steel Pipes for General Fluid Transportation), GB/T3091-2015, GB/T9711-2023 PSL1 and PSL2 (National Standard, also known as Steel Pipes for Oil and Gas Industry Transportation, API-5L (American Petroleum Institute, also known as Pipe Line Steel; divided into PSL1 and PSL2 levels)), and SY/T5040-2008 (Spiral Welded Steel Pipes for Piling).

SY/T5037-2023 is a standard set by the Ministry of Petroleum, commonly referred to as the Ministry Standard.

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

Piled Spiral Welded Steel Pipe (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. It is used for steel pipes in civil engineering structures, wharfs, bridges, and other foundation piles.