Q345B Spiral Steel Pipe

Spiral-welded steel pipes for pressure fluid conveyance, utilizing GB/T9711-2023 spiral seam submerged arc welding steel pipes, 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 using double-sided automatic submerged arc welding for the transportation of general low-pressure fluids such as water, 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 Ordinary 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 grades]), and SY/T5040-2008 (Pile Spiral Welded Steel Pipes).

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

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

Spiral-welded steel pipes for piles (SY5040-2008) are made from hot-rolled steel strip coils as billets, commonly formed through cold-rolled spiral shaping, and are produced using double-sided submerged arc welding or high-frequency welding. These pipes are used for civil engineering structures, docks, bridges, and other foundation pile applications.