Steel Pipe
Kim Hong Loi’s black steel pipes are manufactured from high-quality cold-rolled or hot-rolled steel, featuring smooth surfaces and uniform thickness, suitable for welding, bending, and stamping. These flagship products serve the furniture, mechanical fabrication, industrial machinery frames, and construction sectors.
Description
Additional Information
Description
1. What is Black Carbon Steel Pipe?
Black carbon steel pipe is a type of steel pipe that is not galvanized and has a characteristic black color due to surface oxidation during hot rolling. It is produced from carbon steel with a moderate carbon content, offering high strength and good weldability. Black steel pipes are widely used in various industrial and construction applications thanks to their cost-effectiveness, ease of processing, and superior durability.2. Industrial Applications of Black Carbon Steel Pipes
Black steel pipes are essential materials in many manufacturing and construction sectors. Common applications include:- Construction structures: Frames for buildings, scaffolding, load-bearing steel structures
- Furniture fabrication – metal interior: Table legs, chair frames, metal shelves, metal cabinets
- Household equipment: Bed frames, hammock frames, carts, machine frames
- Mechanical fabrication: Machine frames, vehicle frames, automated machinery structures
- Non-corrosive fluid and air systems: Drainage systems, steam and air pipelines
3. Advantages of Ordering Black Steel Pipes from Kim Hong Loi
Kim Hong Loi manufactures and supplies precision black steel pipes, catering to the diverse needs of production workshops and the metal furniture industry. Advantages of ordering from Kim Hong Loi include:- Accurate dimensions – varied thickness: Products are manufactured to high-quality standards, with strict control over wall thickness, outer diameter, straightness, and roundness.
- High-quality surface – easy to process: Kim Hong Loi black steel pipes have smooth, even surfaces, facilitating cutting, welding, bending, and powder coating.
- Competitive pricing – large volume supply: With factories in Binh Tan and Long An, the company can provide stable and rapid production at optimal prices for businesses.
- Custom production: Kim Hong Loi accepts custom black steel pipes in specific dimensions, lengths, and thicknesses, meeting all requirements from furniture workshops to construction projects.
- Technical consultation – nationwide delivery support: Experienced technical and sales teams are always ready to assist customers from consultation to doorstep delivery.
4. Key Sectors Using Black Carbon Steel Pipes
Black steel pipes are widely applied in sectors such as:- Metal furniture: Tables, chairs, shelves, filing cabinets
- Light industrial and civil mechanical fabrication
- Construction structures – steel buildings
- Carts and industrial racks
- DIY products and smart household appliances
Additional Information
Square Tube Specifications
| Sizes (mm) | 0.80 | 0.85 | 0.90 | 0.95 | 1.00 | 1.05 | 1.10 | 1.15 | 1.20 | 1.25 | 1.30 | 1.35 | 1.40 | 1.45 | 1.50 | 1.55 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14×14 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 2.57 | 2.69 | 2.81 | 2.94 | 3.06 | 3.18 | -/- | -/- | -/- | 5.37 | -/- |
| 16×16 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 2.97 | 3.11 | 3.25 | 3.39 | 3.53 | 3.67 | -/- | -/- | -/- | 5.37 | -/- |
| 20×20 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 3.76 | 3.94 | 4.12 | 4.30 | 4.47 | 4.65 | 4.83 | 4.83 | 5.19 | 5.37 | -/- |
| 25×25 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 4.75 | 4.97 | 5.20 | 5.43 | 5.65 | 5.88 | 6.10 | 6.10 | 6.56 | 6.78 | -/- |
| 30×30 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 5.74 | 6.01 | 6.28 | 6.56 | 6.83 | 7.10 | 7.38 | 7.38 | 7.92 | 8.20 | -/- |
| 40×40 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 7.71 | 8.08 | 8.45 | 8.82 | 9.18 | 9.55 | 9.92 | 10.29 | 10.65 | 11.02 | 11.39 |
| 50×50 | 1.96 | 2.08 | 2.20 | 2.33 | 2.45 | 9.69 | 10.15 | 10.62 | 11.08 | 11.54 | 12.00 | 12.46 | 12.20 | 12.39 | 13.85 | 14.31 |
| 10×20 | 2.11 | 2.24 | 2.37 | 2.51 | 2.64 | 2.77 | 2.90 | 3.03 | 3.17 | 3.30 | 3.43 | 3.43 | -/- | -/- | -/- | -/- |
| 13×26 | 2.86 | 3.02 | 3.40 | 3.58 | 3.94 | 4.12 | 4.30 | 4.47 | 4.65 | 4.83 | 5.01 | 5.01 | 5.19 | -/- | 5.37 | -/- |
| 20×40 | 4.37 | 4.64 | 4.92 | 5.19 | 5.46 | 5.74 | 6.01 | 6.28 | 6.56 | 6.83 | 7.10 | 7.38 | 7.65 | 7.92 | 8.20 | -/- |
| 25×50 | 5.50 | 5.85 | 6.19 | 6.53 | 6.88 | 7.22 | 7.57 | 7.91 | 8.25 | 8.60 | 8.94 | 9.28 | 9.63 | 9.97 | 10.31 | 10.66 |
| 30×60 | 6.63 | 7.05 | 7.46 | 7.88 | 8.29 | 8.71 | 9.12 | 9.53 | 9.95 | 10.36 | 10.78 | 11.19 | 11.61 | 12.02 | 12.43 | 12.85 |
| 40×80 | -/- | -/- | -/- | -/- | -/- | -/- | 11.12 | 11.67 | 12.23 | 12.78 | 13.34 | 13.89 | 14.45 | 15.01 | 16.67 | 17.23 |
| 50×100 | -/- | -/- | -/- | -/- | -/- | -/- | -/- | -/- | 16.73 | 17.45 | 18.16 | 18.82 | 19.52 | 20.22 | 20.91 | 21.61 |
| Sizes (mm) | 1.60 | 1.70 | 2.00 | 2.30 | 2.50 |
|---|---|---|---|---|---|
| 14×14 | -/- | -/- | -/- | -/- | -/- |
| 16×16 | -/- | -/- | -/- | -/- | -/- |
| 20×20 | -/- | -/- | -/- | -/- | -/- |
| 25×25 | -/- | -/- | -/- | -/- | -/- |
| 30×30 | -/- | -/- | -/- | -/- | -/- |
| 40×40 | 11.39 | 11.76 | 14.29 | 16.90 | 18.37 |
| 50×50 | 14.31 | 14.77 | 15.69 | 21.23 | 23.08 |
| 10×20 | -/- | -/- | -/- | -/- | -/- |
| 13×26 | -/- | -/- | -/- | -/- | -/- |
| 20×40 | 8.20 | -/- | -/- | -/- | -/- |
| 25×50 | 10.69 | 11.31 | 13.75 | 17.99 | 17.99 |
| 30×60 | 12.40 | 14.09 | 16.58 | 21.45 | 21.45 |
| 40×80 | 17.89 | 18.90 | 22.23 | 26.87 | 28.67 |
| 50×100 | 21.61 | 22.31 | 27.00 | 35.92 | 35.92 |
- Thickness tolerance: +/- 0.03mm, dimension tolerance: +/- 0.03mm, length tolerance: +/- 5mm.
- Items marked in red are always in stock; actual delivery is based on weight at KHL warehouse – CCN Hải Sơn, Đức Hòa, Long An.
- In addition to the specifications above, we accept custom tube sizes according to customer orders.
Round Tube Specifications
| Sizes (mm) | 0.80 | 0.90 | 0.95 | 1.00 | 1.05 | 1.10 | 1.15 | 1.20 | 1.25 | 1.30 | 1.35 | 1.40 | 1.45 | 1.50 | 1.55 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ø15,9 | 1.88 | 2.12 | 2.24 | 2.36 | 2.47 | 2.59 | 2.71 | 2.83 | 2.94 | 3.06 | 3.18 | 3.30 | 3.41 | 3.53 | 3.65 |
| Ø19,1 | 2.24 | 2.52 | 2.66 | 2.80 | 2.94 | 3.08 | 3.22 | 3.36 | 3.50 | 3.64 | 3.78 | 3.92 | 4.06 | 4.20 | 4.34 |
| Ø21 | 2.47 | 2.78 | 2.93 | 3.09 | 3.24 | 3.39 | 3.55 | 3.70 | 3.86 | 4.01 | 4.16 | 4.32 | 4.47 | 4.63 | 4.78 |
| Ø21.8 | 2.58 | 2.90 | 3.07 | 3.23 | 3.39 | 3.55 | 3.71 | 3.87 | 4.03 | 4.19 | 4.36 | 4.52 | 4.68 | 4.84 | 5.00 |
| Ø25.4 | 3.00 | 3.37 | 3.56 | 3.74 | 3.93 | 4.12 | 4.31 | 4.49 | 4.68 | 4.87 | 5.06 | 5.24 | 5.43 | 5.62 | 5.80 |
| Ø27 | 3.18 | 3.58 | 3.78 | 3.98 | 4.18 | 4.38 | 4.58 | 4.78 | 4.98 | 5.17 | 5.37 | 5.57 | 5.77 | 5.97 | 6.17 |
| Ø31.8 | 3.75 | 4.22 | 4.45 | 4.69 | 4.92 | 5.16 | 5.39 | 5.62 | 5.86 | 6.09 | 6.33 | 6.56 | 6.80 | 7.03 | 7.26 |
| Ø38.1 | 4.50 | 5.07 | 5.35 | 5.63 | 5.91 | 6.20 | 6.47 | 6.75 | 7.04 | 7.32 | 7.60 | 7.88 | 8.16 | 8.44 | 8.72 |
| Ø42 | 4.97 | 5.60 | 5.91 | 6.22 | 6.53 | 6.84 | 7.15 | 7.46 | 7.77 | 8.08 | 8.39 | 8.70 | 9.01 | 9.33 | 9.64 |
| Sizes (mm) | 1.60 | 1.70 | 2.00 |
|---|---|---|---|
| Ø15,9 | 3.77 | -/- | -/- |
| Ø19,1 | 4.48 | -/- | -/- |
| Ø21 | 4.94 | -/- | -/- |
| Ø21.8 | 5.16 | -/- | -/- |
| Ø25.4 | 5.99 | -/- | -/- |
| Ø27 | 6.37 | -/- | -/- |
| Ø31.8 | 7.50 | -/- | -/- |
| Ø38.1 | 9.01 | 9.57 | 11.26 |
| Ø42 | 9.95 | 10.57 | 12.43 |
- Thickness tolerance: +/- 0.03mm, dimension tolerance: +/- 0.03mm, length tolerance: +/- 5mm.
- Items marked in red are always in stock, delivered based on actual weight at KHL warehouse – CCN Hải Sơn, Đức Hòa, Long An.
- Besides the above specifications, we also manufacture tubes according to customer order dimensions.