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Extruded Fin Tubes
Table of Content
Solitaire Overseas is a trusted manufacturer and supplier of extruded finned tubes, known for delivering high-quality products that meet both domestic and international standards.
Extruded finned tubes are created using a bi-metallic design, featuring an aluminum outer core and a parent tube made from various materials. The fins are formed by rolling the aluminum from the exterior tube, creating an integral fin structure. This process involves compressing the aluminum outer core onto the parent tube, exposing it to high pressures that shape the fins into their final profile. These tubes can handle maximum operating temperatures of up to 290°C.
The base tube of our extruded finned tubes can be made from materials such as stainless steel, carbon steel, corrosion-resistant steel, copper, and copper alloys.
We offer standard sizes including 36 mm, 50.8 mm, and 57 mm for the finned outer diameter, with fin densities ranging from 9 to 11 fins per inch (fpi). Additionally, we provide many special sizes in both single-metal and bi-metal extruded fin tubes to meet specific project requirements.
| Attribute | Description |
| Manufacturing Process | Cold Extrusion |
| Fin to Tube Bond | Excellent |
| Heat Transfer Efficiency | Excellent |
| Mechanical Resistance | Excellent (Can be frequently cleaned with high-pressure jets, reducing downtime and increasing overall life.) |
| Corrosion Protection | Provides excellent corrosion protection by entirely covering the base tube. |
| Temperature Range | Up to a maximum of 300°C |
| Tube Code | d | D | P | Fins per Inch |
Surface Area |
| mm | mm | mm | Nos. | Sq.m/m | |
| BM-16-37-2.8 | 16 | 37±1 | 2.80 | 9 | 0.62 |
| BM-16-37-2.5 | 2.54 | 10 | 0.69 | ||
| BM-16-37-2.3 | 2.30 | 11 | 0.76 | ||
| BM-19.05-42-2.8 | 19.05 | 42±1 | 2.80 | 9 | 0.78 |
| BM-19.05-42-2.5 | 2.54 | 10 | 0.86 | ||
| BM-19.05-42-2.3 | 2.30 | 11 | 0.95 | ||
| BM-22.22-54-3.6 | 22.22 | 54±1 | 3.62 | 7 | 1.05 |
| BM-22.22-54-3.1 | 3.17 | 8 | 1.19 | ||
| BM-22.22-54-2.8 | 2.80 | 9 | 1.35 | ||
| BM-22.22-54-2.5 | 2.54 | 10 | 1.50 | ||
| BM-22.22-54-2.3 | 2.30 | 11 | 1.65 | ||
| BM-25.4-57.15-3.6 | 25.4 | 57.15 (+0.8,-1.2) |
3.62 | 7 | 1.13 |
| BM-25.4-57.15-3.1 | 3.17 | 8 | 1.29 | ||
| BM-25.4-57.15-2.8 | 2.80 | 9 | 1.46 | ||
| BM-25.4-57.15-2.5 | 2.54 | 10 | 1.62 | ||
| BM-25.4-57.15-2.3 | 2.30 | 11 | 1.78 | ||
| BM-31.75-63.5-3.6 | 31.75 | 63.5 (+0.8,-1.2) |
3.62 | 7 | 1.30 |
| BM-31.75-63.5-3.1 | 3.17 | 8 | 1.49 | ||
| BM-31.75-63.5-2.8 | 2.80 | 9 | 1.68 | ||
| BM-31.75-63.5-2.5 | 2.54 | 10 | 1.86 | ||
| BM-31.75-63.5-2.3 | 2.30 | 11 | 2.05 | ||
| BM-38.1-69.85-3.6 | 38.1 | 69.85 (+0.8,-1.2) |
3.62 | 7 | 1.48 |
| BM-38.1-69.85-3.1 | 3.17 | 8 | 1.69 | ||
| BM-38.1-69.85-2.8 | 2.80 | 9 | 1.91 | ||
| BM-38.1-69.85-2.5 | 2.54 | 10 | 2.12 | ||
| BM-38.1-69.85-2.3 | 2.30 | 11 | 2.33 | ||
| BM : Bimetalic Extruded Finned Tubes | |||||
| d : Base tube diameter | |||||
| D : Fin Outer diameter | |||||
| P : Fin pitch | |||||
| Tube Code | D | d | dw | P | Fins per Inch |
| mm | mm | mm | mm | Nos. | |
| MM-38-20-16-2.8 | 38 | 20 | 16 | 2.80 | 9 |
| MM-38-20-16-2.5 | 2.54 | 10 | |||
| MM-38-20-16-2.3 | 2.30 | 11 | |||
| MM-51-29-25-3.6 | 51 | 29 | 25 | 3.62 | 7 |
| MM-51-29-25-3.1 | 3.17 | 8 | |||
| MM-51-29-25-2.8 | 2.80 | 9 | |||
| MM-51-29-25-2.5 | 2.54 | 10 | |||
| MM-51-29-25-2.3 | 2.30 | 11 | |||
| MM-57-33-29-3.6 | 57 | 33 | 29 | 3.62 | 7 |
| MM-57-33-29-3.1 | 3.17 | 8 | |||
| MM-57-33-29-2.8 | 2.80 | 9 | |||
| MM-57-33-29-2.5 | 2.54 | 10 | |||
| MM-57-33-29-2.3 | 2.30 | 11 | |||
| MM : Monometalic Extruded Finned Tubes | |||||
| D : Fin outer diameter | |||||
| d : Root diameter | |||||
| dw : Tube ID | |||||
| P : Fin pitch | |||||
| Feature | Description |
| Strong Fin-to-Tube Bond | Ensures a complete bond between fins and tube, enhancing efficiency and extending the product's lifespan. |
| Corrosion Resistance | Protects the base tube against corrosion, increasing durability. |
| Easy Maintenance | Can be cleaned using high-pressure water jets without damaging the fins. |
| No Galvanic Corrosion | Continuous outer sleeve prevents galvanic corrosion between tube and fins, ensuring long-term performance. |
| Thermal Stress Management | Secure bonding minimizes risk of contact loss due to thermal stress and is resistant to vibrations. |
| Enhanced Heat Transfer | Offers superior heat transfer capabilities throughout the unit's lifespan. |
| High-Temperature Applications | Suitable for environments with temperatures up to 325°C. |
| Heat Exchangers: Widely used in various power plants, including electric, nuclear, thermal, and geothermal facilities, to enhance heat transfer efficiency. |
| Steam Condensate Systems: Effective in managing steam condensation processes and improving system performance. |
| Chemical and Petrochemical Industries: Essential for efficient heat transfer in various chemical processing applications. |
| Food Processing and Refrigeration: Utilized in food processing plants and refrigeration systems to maintain optimal temperatures. |
| Industrial Applications: Commonly found in steel mills, waste incinerators, and gas compression facilities for effective heat management. |
FAQ
Extruded Fin Tubes, or Bi-Metallic Fin Tubes, have fins formed by extruding material from the outer surface. The base tube slides inside an outer tube, typically copper or aluminum.
Embedded fins (G-Fins) are created by winding an aluminum or copper strip into a helical groove on the tube's outer surface. In contrast, extruded fins are formed by cold plastic deformation of a bimetallic tube, resulting in an aluminum surface with fins.
Extruded aluminum tubes are made by pressing heated aluminum billets through an extrusion die, shaping them into the desired tube form. This process allows for complex cross-sectional profiles and varying wall thicknesses.