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| Number | Parameter | Dimensions |
| 1 | Tube length（mm） | 7070 |
| 2 | Tube diameter（mm） | 25 |
| 3 | Fin length（mm） | 6870 |
| 4 | Bracket for fixing the tube in the threaded flange | |
| 5 | Wall thickness（mm） | 2 |
| 6 | Number of fins | 10 |
| 7 | U-fin geometry | |
| 8 | Fin wall thickness（mm） | 0.8 |
| 9 | Tube Material | GB/T699-1999 10# | |||
| 10 | Fin material | GB/T699-1999 10# | |||
| 11 | Mechanical properties |
Tensile Strength，N/mm2 (kgf/mm2) |
410-570 | ||
|
Yield Strength，N/mm2 (kgf/mm2) |
≥245 | ||||
| Relative elongation，% | ≤23 | ||||
| Relative shrinkage，% | - | ||||
|
Impact toughness KCU、 J/cm2 (kgf*m/cm2) |
- | ||||
|
Brinell hardness HB,
not exceeding
|
124- 166 | ||||
| Brinell hardness HB | - | ||||
| 12 | Pipe diameter deviation（mm） | ±0. 1 |
| 13 | Pipe wall thickness deviation（%） | Recommended ±7.5 (up to ±8 allowed) |
| 14 | Curvature along the tube Length（mm） | Maximum 1.5 mm per 1 meter of tube |
Datang fin tube product’s specification outside diameter from 18 mm to 273 mm finned tube, The process includes high-frequency welded fin tubes, extruded fin tubes, L / L L / K L fin tubes, G -type Embedded fin tubes, low fin tubes, inner fin tubes, elliptical fin tubes, longitudinal fin tube,H type fin tube, the annual capacity can reach 100,000 tons.
We have professional engineer support, high efficiency sales team and competitive price superiority.
Our R & D department provide the strong technical support and enable us to receive some, O D M projects, and can provide you with drawings, design plans and thermal calculations, service has exceeded more than 3000 enterprises.Datang looks forward to doing business with you!
