Product Overview：
Seamless steel pipes for fluids are generally used for transporting fluids. They are a type of steel pipe with a hollow cross-section, no welds, and are widely used for transporting fluids such as oil, natural gas, coal gas, water, and certain solid materials. Compared with solid steel materials such as round steel, steel pipes are lighter in weight when their bending and torsional strength is the same. They are an economical cross-sectional steel material widely used in the manufacture of structural and mechanical parts, such as oil drill rods, automotive transmission shafts, bicycle frames, jack sleeves, and steel scaffolding used in construction.
| Product List |
| Product Name: | GB8163 Seamless Steel Pipe for Fluid Transport | Seamless Pipe |
| Product Name: | 20 # Seamless steel pipe for fluid | Seamless pipe |
| Product Name: | 45 # Seamless steel pipe for fluid | Seamless pipe |
| Product Name: | Seamless steel pipes for hot-rolled fluids |
| Product Name: | Seamless steel pipe for hot expansion fluid |
| Product Name: | Seamless steel pipe for low-pressure fluid |
| Product Name: | Seamless steel pipe for national standard fluids | Seamless pipe |
| Parameter range |
| Outer diameter | Φ6mm‑Φ630mm |
| Wall thickness | 0.8mm‑75mm |
| Standard length | 1‑12m， Customizable short and extended non ruler |
| Outer diameter accuracy | Maximum ± 0.03mm |
| Executive Standards | ASTM A106, API 5L, DIN 17175, GB/T 8163 |
| Non-standard customization | Special wall thickness, inner wall polishing, acid pickling and passivation, and fluid pressure resistant deep processing can all be customized |
| Common specifications in the market |
| Outer diameter (mm) | 32 | 38 | 42 | 48 | 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 | 3.0、3.5、4.0、4.5 | 3.0、3.5、4.0、5.0 | 3.5、4.0、4.5、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) | 4.0、4.5、5.0、6.0 | 4.5、5.0、6.0、7.0 | 5.0、6.0、8.0 | 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 (mm) |
| Hot rolled (expanded) pipe | ± 1% D or ± 0.5, whichever is larger |
| Cold drawn (rolled) tube | ± 0.75% D or ± 0.3, whichever is larger |
| Hot rolled wall thickness tolerance |
| Outer diameter D (mm) | S/D ratio | Wall thickness deviation (mm) |
| ≤102 | — | ± 12.5% S or ± 0.4, whichever is greater |
| ＞102 | ≤0.05 | ± 15% S or ± 0.4, whichever is greater |
| ＞102 | 0.05‑0.10 | ± 12.5% S or ± 0.4, whichever is greater |
| ＞102 | ＞0.10 | +12.5%S /‑10%Siscommon.p... |
| Thermal expansion pipe | All | +17.5%S /‑12.5%S |
| Cold drawn wall thickness tolerance |
| Wall thickness (mm) | Wall thickness deviation (mm) |
| ≤3 | +15% S/-10% S or ± 0.15, whichever is larger |
| 3‑10 | +12.5%S/‑10%S |
| ＞10 | ±10%S |
| Geometric tolerance |
| Project | Indicators |
| Ellipticity | ≤ 80% outer diameter tolerance (specified in the contract) |
| Bending degree | ≤ 1.5 mm/m |
| Tip: The tolerance of fluid pipes is loose and cannot replace GB/T3639 precision steel pipes for machining sleeves. |
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 |
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