The oblique rolling method is to first perforate the tube blank with an oblique rolling roller, and then extend it with a rolling mill. This method has a fast production speed, but has high requirements for the processability of the tube blank, and is mainly suitable for the production of carbon steel and low-alloy steel pipes. The extrusion method is to perforate the tube blank or ingot with a piercing machine, and then extrude it into a steel pipe with an extruder. This method is less efficient than the oblique rolling method and is suitable for the production of high-strength alloy steel pipes.
Both the oblique rolling method and the extrusion method must first heat the tube blank or ingot, and the steel pipe produced is called a hot-rolled tube.
Steel pipes produced by hot processing can sometimes be cold processed as needed. There are two methods of cold processing: one is the cold drawing method, which is to pull the steel pipe through the tube drawing die to gradually thin and elongate the steel pipe; the other method is the cold rolling method, which is a method of applying a hot rolling mill to cold processing.
Cold processing of seamless steel pipes can improve the dimensional accuracy and processing finish of steel pipes, improve the mechanical properties of materials, etc.
| Product Name | Carbon steel seamless steel pipe |
| Grade | Q235/Q355/10#/20#/45#/A36/A572/Gr.B etc. |
| Technique | Hot rolling/ Cold drawing/ Precision cold drawn tube |
| Standard | ASTM,AISI,GB,DIN,JIS |
| Outside diameter | 6mm-1020mm or Customizable |
| Thickness | 0.5mm-100mm or Customizable |
| Length | 6000mm/12000mm/ random length or Customizable |
| MOQ | 1ton /Customized version with a minimum order of 3 tons |
| Package | Export sea worthy package |
| Delivery | Normally 3-7 days after receiving 30% deposit |
| Payment | T/T, L/C, DP or Negotiable |
| Application | A pipeline used for transporting fluids, such as oil, natural gas, coal gas, water, and certain solid materials |
| Used for manufacturing structural and mechanical components, such as oil drill rods, automotive transmission shafts, bicycle frames, and steel scaffolding used in construction |
| Used for manufacturing weapons, barrels, cannon barrels, etc |