Product Overview：
Seamless steel pipes for structural use are suitable for commonly used seamless steel pipes in general and mechanical structures. They are a variety of seamless steel pipes classified according to their different uses, mainly used in general and mechanical structures. Seamless steel pipes for structural use are commonly used in industries such as chemical, petroleum, textile, medical, food, and machinery for corrosion-resistant pipelines, structural components, and parts. They are hot-rolled, expanded, cold-rolled, and cold drawn seamless steel pipes.
| Product List |
| Product Name: | GB8162 Seamless Steel Pipe for Structural Use | Seamless Pipe |
| Product Name: | 20 # Seamless steel pipe for structure | Seamless pipe |
| Product Name: | 45 # Seamless steel pipe for structure | Seamless pipe |
| Product Name: | Seamless steel pipes for hot-rolled structures |
| Product Name: | Seamless steel pipe for cold drawn structure |
| Product Name: | Seamless steel pipe for national standard structure | Seamless pipe |
| Parameter range |
| Outer diameter | Φ6mm‑Φ219mm |
| Wall thickness | 0.5mm‑20mm |
| Standard length | 1‑12m， Support customization of short and long scales |
| Outer diameter accuracy | Maximum ± 0.03mm |
| Executive Standards | ASTM A519, EN 10297-1, DIN 17175, JIS G3444, GB/T 8162 |
| Non-standard customization | Special inner holes, thickened wall thickness, strict tolerances, heat treatment, and end processing can all be customized |
| Commonly used hot rolling specifications in the market |
| Outer diameter (mm) | 32
| 38 | 45 | 57 | 60 | 76 | 89 | 108 |
| Common wall thickness (mm) | 2.5，3.0，3.5 | 2.5，3.0，3.5，4.0 | 3.0，3.5，4.0 | 3.0，3.5，4.0，4.5 | 3.0，3.5，4.0，5.0 | 3.5，4.0，5.0，6.0 | 4.0，4.5，5.0，6.0 | 4.0，4.5，5.0，6.0 |
| Outer diameter (mm) | 133
| 159 | 168 | 219 | 273 | 325 | 377 | 426 |
| Common wall thickness (mm) | 4.5，5.0，6.0，8.0 | 5.0，6.0，7.0，8.0 | 5.0，6.0，8.0，10 | 6.0，7.0，8.0，10 | 7.0，8.0，10，12 | 8.0，10，12 | 9.0，10，12 | 10，12，14 |
Optional tolerance range |
| Tolerance control | Optional manufacturing process |
| Tolerance ≤ 0.05 mm | Cold rolling |
| Tolerance ≤ 0.10 mm | Cold rolling |
| Tolerance ≤ 0.30 mm | Cold drawing | Cold rolling |
| Tolerance ≤ 0.50 mm | Cold drawing | Hot rolling |
| Tolerance ≤ 1.00 mm | Hot rolling | Hot expanding |
| Outer diameter tolerance |
| Steel pipe type | Allowable deviation of outer diameter |
| Hot rolled/expanded tube | ± 1% D or ± 0.5mm, whichever is larger |
| Cold drawn/cold-rolled pipes | ± 0.75% D or ± 0.3mm, whichever is larger |
| Wall thickness tolerance - Hot rolling |
| Outer diameter D (mm) | Wall thickness deviation |
| ≤102 | ± 12.5% S or ± 0.4mm, whichever is larger |
| ＞102 | +12.5%S /‑10%S |
| Wall thickness tolerance - cold drawing |
| Wall thickness S (mm) | Wall thickness deviation |
| ≤3 | +15% S/-10% S or ± 0.15mm, whichever is larger |
| 3‑10 | +12.5%S/‑10%S |
| ＞10 | ±10%S |
S - nominal wall thickness, D - nominal outer diameter; The tolerance of structural pipes is loose and cannot replace GB/T3639 precision pipe machining |
Optional delivery status
|
| Oil removal from oil pipes | Annealing and straightening | Steel pipe corrosion prevention |
| Steel pipe threading | Length cut-to-length | Steel pipe coating |
| Steel pipe cap | Exquisite bundling | Beveling |
Now ready to place an order:
You can view Ordering Matters | Payment Matters, or enter Submit Purchase | Contact Us
Jia hui
Jia hui