Types by Application
Welded steel pipe can be categorized into:
- General-use pipe
- Galvanized pipe
- Oxygen pipe
- Wire pipe
- Metric pipe
- Roller pipe
- Deep well pump tube
- Automotive tube
- Transformer tube
- Welding thin-walled tube
- Welding shaped tube
- Spiral welded pipe
Pipe Standards & Representative Uses
GB/T3091-1993 (Low-pressure fluid galvanized welded steel pipes):
Used for water, gas, air, oil, hot water, steam heating, and general low-pressure fluid control.
Material: Q235A grade steel.
GB/T3092-1993 (Low-pressure fluid galvanized welded steel pipes):
Similar applications as above for low-pressure fluids.
Material: Q235A grade steel.
GB/T14291-1992 (Mining fluid welded steel pipe):
For mine air pressure, drainage, gas discharge.
Material: Q235A, B grade steel.
GB/T14980-1994 (Large diameter low-pressure liquid delivery welded steel pipe):
Used for water, sewage, gas, air, low-pressure steam and heating fluids.
Material: Q235A grade steel.
GB/T12770-1991 (Mechanical structure with stainless steel welded pipe):
Used in machinery, automotive, bicycles, furniture, hotels, restaurants, etc.
Materials: 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb.
GB/T12771-1991 (Fluid transport stainless steel welded pipe):
For low-pressure corrosive media.
Materials: 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2.
