Different Types of Welded Steel Pipes by Application

Welded steel pipes are tubular products made from flat plates, called skeletons, which are formed, bent and prepared for welding. The production process of welded steel pipe is simple, with high production efficiency , large variety of specifications and the less equipment .

With the rapid development of high-quality strip continuous rolling production and the advancement of welding and inspection technology, the quality of welds continues to improve, and the variety and specifications of welded steel pipes are increasing, and it has replaced seamless steel pipes in more and more fields.

Welded pipes are mainly used in the construction industry to transport low-pressure fluids such as water, gas, and compressed air. They are divided into the following varieties due to their different materials and uses:

1. GB/T3091-1993 (galvanized welded steel pipe for low pressure fluid transportation)

●Mainly used for conveying water, gas, air, oil, heating hot water or steam and other generally lower pressure fluids and other purposes. Its representative material is Q235A grade steel.

2. GB/T3092-1993 (galvanized welded steel pipe for low pressure fluid transportation)

●Mainly used to transport water, gas, air, oil, heating hot water or steam and other generally lower pressure fluids and other purposes. Its representative material is: Q235A grade steel.

3. GB/T14291-1992 (Welded steel pipe for mining fluid transportation)

●Mainly used for straight seam welded steel pipes for mine pressure, drainage, and shaft gas discharge. Its representative material is Q235A, Grade B steel.

4. GB/T14980-1994 (Large diameter electric welded steel pipe for low pressure fluid transportation). 

●It is mainly used to transport low-pressure fluids such as water, sewage, gas, air, heating steam and other purposes. Its representative material is Q235A grade steel.

5.GB/T12770-1991 (stainless steel welded steel pipe for mechanical structure)

●Mainly used in machinery, automobiles, bicycles, furniture, hotel and restaurant decoration and other mechanical parts and structural parts. Its representative materials are 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.

6.GB/T12771-1991 (stainless steel welded steel pipe for fluid transportation)

●Mainly used to transport low-pressure corrosive media. Representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.