We are the factory and supplier of carbon steel pipe, black steel pipe, carbon steel seamless pipe, API 5L tubing. We can supply a large number of standard size stock at any time, can also be customized according to the customer's drawings, we can meet the inspection and certification requirements.
| specifications | Wall thickness | specifications | Wall thickness | specifications | Wall thickness | specifications | Wall thickness |
| DN15 | 1.8 | DN40 | 1.8 | DN80 | 2.2 | DN150 | 2.5 |
| 2 | 2 | 2.5 | 2.75 | ||||
| 2.2 | 2.2 | 2.75 | 3 | ||||
| 2.5 | 2.5 | 3 | 3.25 | ||||
| 2.75 | 2.75 | 3.25 | 3.5 | ||||
| DN20 | 1.8 | 3 | 3.5 | 3.75 | |||
| 2 | 3.25 | 3.74 | 4 | ||||
| 2.2 | 3.5 | 4 | 4.25 | ||||
| 2.5 | DN50 | 1.8 | DN100 | 2 | DN200 | 2.75 | |
| 2.75 | 2 | 2.2 | 3 | ||||
| DN25 | 1.8 | 2.2 | 2.5 | 3.25 | |||
| 2 | 2.5 | 2.75 | 3.5 | ||||
| 2.2 | 2.75 | 3 | 3.75 | ||||
| 2.5 | 3 | 3.25 | 4 | ||||
| 2.75 | 3.25 | 3.5 | 4.25 | ||||
| 3 | 3.5 | 3.75 | 4.5 | ||||
| 3.25 | DN65 | 2.2 | 4 | 4.75 | |||
| DN32 | 1.8 | 2.5 | 4.25 | 5 | |||
| 2 | 2.75 | DN125 | 2.5 | DN200 | 5.5 | ||
| 2.2 | 3 | 2.75 | DN200 | 5.75 | |||
| 2.5 | 3.25 | 3 | DN200 | 6 | |||
| 2.75 | 3.5 | 3.25 | 273-2020 | 3.75-40 | |||
| 3 | 3.75 | 3.5 | |||||
| 3.25 | 3.75 | ||||||
| 4 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| Q235 | Min. | / | / | / | / | / | / | / | ||
| Max. | 8 | 24 | 15 | 12 | 10 | |||||
| 304L | Min. | / | / | / | / | / | 18 | / | 9 | / |
| Max. | 0.03 | 2 | 1 | 0.045 | 0.03 | 20 | 11 | |||
| 304H | Min. | 0.04 | / | / | 0.045 | / | 18 | / | 8 | / |
| Max. | 0.1 | 2 | 0.75 | / | 0.03 | 20 | 10.5 | |||
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
| (MPa) | 0.2% Proof (MPa) | (% in 50mm) | Rockwell B | Brinell | |
| (HR B) | (HB) | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 515 | 205 | 40 | 90 | 187 |
| 304H | 515 | 205 | 40 | 92 | 201 |
The blank used for welding steel pipe is steel plate or strip steel, which is divided into furnace welding pipe, electric welding (resistance welding) pipe and automatic arc welding pipe because of the different welding process. Because of its different welding form is divided into straight seam welding pipe and spiral welding pipe two kinds. Because of its end shape is divided into circular welded pipe and shaped (square, flat, etc.) welded pipe. The welded pipe is divided into several varieties as follows because of its different materials and uses:
＄400-600
