Products Description
Product Specifications
| Standards | ASTM B152 / ASTM B75 / ASTM B111 |
| Tube Materials | C11000 / C12200 / CuNi 90/10 |
| Fin Materials | Copper strip or CuNi strip |
| Outer Diameter (OD) | 12 mm – 38 mm (customizable) |
| Wall Thickness (WT) | 0.7–2 mm (customizable) |
| Fin Height | 6–15 mm (customizable) |
| Fin Thickness | 0.2-0.5 mm (customizable) |
| Tube Length | Can be customized upon request |
| Condition | Annealed / stress-relieved |
C11000 spirally wound fin tube features a copper content of at least 99.90% and a thermal conductivity of up to 388 W/(m·K)-25 times that of 316L stainless steel-making them suitable for standard residential and commercial HVAC systems.
C12200 phosphorus-deoxidized copper tubes exhibit excellent resistance to hydrogen embrittlement during welding. Compared to C11000, they are better suited for welding complex piping systems and for use in central air conditioning units subject to frequent start-stop cycles or long-term continuous operation.
CuNi 90/10 copper-nickel alloy tubes withstand high-salinity seawater and chloride-containing brackish water, making them ideal for harsh environments with high salinity and moisture, such as HVAC systems in marine vessels and coastal areas.
Customized Services
- TORICH offers customizable material options, allowing for flexible combinations of base tube and fin materials-such as CuNi 90/10 base tubes with CuNi 70/30 fins.
- Fin height, thickness, and spacing can be tailored to meet specific requirements for balancing heat transfer and pressure drop. Enhanced fin designs, such as louvered or corrugated fins, are also available.
- Tube ends can be processed by flaring, swaging, flanging, squaring, or chamfering; this eliminates the need for secondary welding and ensures direct compatibility with connections for air-conditioning heat exchangers, condensers, and evaporators.
Chemical Composition
| Element | Cu (%) | Ni (%) | Fe (%) | P (%) | Other |
|---|---|---|---|---|---|
| C11000 | ≥ 99.90 | - | - | - | Trace impurities |
| C12200 | ≥ 99.90 | - | - | 0.015–0.040 | Trace impurities |
| CuNi 90/10 | Balance | 9.0–11.0 | 1.0–1.8 | - | Mn, trace elements |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) |
| C11000 | ≥ 210 | ≥ 60 | ≥ 40 | 40–70 |
| C12200 | ≥ 220 | ≥ 70 | ≥ 35 | 45–75 |
| CuNi 90/10 | ≥ 300 | ≥ 120 | ≥ 30 | 80–120 |
Possible Alternative Grades
- For certain industrial cooling or high-temperature flue gas applications, stainless steel finned tubes-featuring stainless steel (304/316) base tubes with wound stainless steel fins-may be considered due to their superior pressure and temperature resistance.
- CuNi 70/30 offers better resistance to seawater flow-induced corrosion and biofouling than CuNi 90/10, making it suitable for offshore HVAC systems.
- For residential HVAC systems, aluminum alloys (AA 1100/3003) are a viable option, as they are more cost-effective than copper.
application areas
Thanks to their excellent thermal conductivity, spirally wound fin tube is suitable for applications such as central air conditioning systems, chiller heat exchangers, air-cooled condensers, rooftop HVAC units, fan coil units (FCUs), heat recovery ventilation systems (HRV/ERV), commercial building HVAC systems, and marine air conditioning condensers.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: Can these finned tubes be bent into a U-shape?
A: Yes. In their annealed, soft state, our finned tubes can be bent, provided a sufficient bending radius is maintained (requiring the removal or flattening of fins in the bend section).
Q: Do CuNi 90/10 finned tubes require additional anti-corrosion or anti-fouling treatment?
A: No additional treatment is required. The products undergo passivation and anti-fouling coating treatments before leaving the factory, allowing for direct use in humid, salt-spray, or corrosive environments.
Q: What advantages do spirally wound finned tubes offer compared to traditional embedded or sleeve-type finned tubes?
A: The spirally wound fins are integrated with the base tube via welding or a high-strength mechanical bond, eliminating the contact thermal resistance found in sleeve-type tubes and increasing heat transfer efficiency by 15–30%. They also offer superior resistance to vibration and thermal shock, ensuring the fins do not loosen or detach.
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