Square Carbon Steel Pipe

The square carbon steel pipe is divided into seamless type and welded type.

Standards Compliant
1. GB/T3094-2000 Cold Drawn Shaped Steel Tube
2. GB/T6728-2002 Structural Cold-Formed Steel Hollow Sections
3. ASTM A500 Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
4. JIS G3466 Carbon Steel Square Tube for General Structural Purposes
5. DIN EN 10210 Non-Alloy, Fine-Grain Structural Steel and Hot-Finished Structural Hollow Sections
6. DIN EN 10219 Non-Alloy, Fine-Grain Structural Steel and Cold-Formed Steel Hollow Sections
7. JG 178-2005 Cold-Formed Rectangular Steel Tube for Building Structure
8. Special Agreement of Tolerance

Product Material
Q235, Q345 (16Mn), 20#, alloy steel, stainless steel

Product Use
The square carbon steel tube is used for steel construction in the mechanical equipment and solar equipment. It can also be used to make car components, bridge piles and guardrails, as well as the inner structure of ships.

The theoretical weight of the square carbon steel pipe is calculated according to the following formula.Theoretical Weight = (Side Length Side Length) × 2 × Thickness × 0.00785 × LengthNote: The unit of the calculated result is kg/m.

Our company can provide the following square carbon steel pipes.
1. Welded square pipe for low pressure fluid transport
Standard: GB/T3091-2008
Materials: Q235A, Q235B, Q345B, etc.
Use: For conveying water, gas, air, oil, as well as hot water or steam for heating

2. Galvanized welded square tube for low pressure fluid transport
Standard: GB/T3092-2008
Materials: Q235A, Q235B, Q345B, etc.
Use: For conveying water, gas, air, oil, hot water or steam for heating, as well as other low pressure fluids
Note: The product surface is hot dip galvanized or cold galvanized.

3. Galvanized welded square tube for mine liquid transport
Standard: GB/T14291-2000
Materials: Q235A, B grade steel
Use: For mine air compression, drainage, and gas drainage

4. Large diameter welded square tube
Standard: GB/T14980-1994
Material: Q235 A or B grade
Use: For conveying water, sewage, gas, air, heating steam, and other low pressure fluids

5. Welded square stainless steel tube for mechanical structure
Standard: GB/T12770-1991
Material: 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.
Use: For making mechanical components and structural parts in machinery, automobile, bicycle, furniture, etc.

6. Welded square stainless steel tube for fluid conveying
Standard: GB/T12771-1991
Material: 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.
Use: For conveying low pressure corrosive media

7. Spiral square tube for low pressure fluid transport
Standard: SY/T5037-2008
Material: Q235B, Q345B, or other carbon steels
Use: For conveying low pressure water, oil, natural gas, etc.

8. Square pipe for conveying transporting flammable and non-flammable fluids
Standard: GB/T9711.1 (GB/T9711.2)-1997
Material: L245-L415, and other steels for line pipes
Use: For transporting low or high pressure flammable and non-flammable fluids.

Related Names
Rectangular Steel Tubing | Structural Steel Tube | Galvanized Welded Tube