API Standard Spiral Steel Pipe

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

General low-pressure fluid transportation, spiral seam submerged arc welded steel pipes according to GB/T3091-2015, SY/T5037-2023, manufactured by double-sided automatic submerged arc welding for use in water, coal gas, air, steam, and other general low-pressure fluid transportation.

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

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

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

Piling Spiral Welded Steel Pipe (SY5040-2008) is manufactured from hot-rolled steel strip coils, formed into pipes through normal temperature spiral rolling, and joined by 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.