Products Description
Product Specifications
| Standards | JIS H 3300:2018 |
| Steel Grades | C 1020, C 1100, C 1201, C 1220, C 2200, C 2300, C 2600, C 2700, C 2800, C 4430, C 6870, C 6871, C 6872, C 7060, C 7100, C 7150, C 7164, etc. |
| Equivalent Standards | ASTM B280/B88/B75M;GB/T 17791;EN 1057 |
| Tube Outer Diameter | 12 mm – 50 mm |
| Tube Wall Thickness | 0.8 mm –5 mm |
| Length | 6 m, or customized |
| Fin Height | 3 mm – 22 mm |
| Fin Thickness | 0.3 mm – 1.5 mm |
| Fin Pitch | 8 – 14 fins per inch |
TORICH Double L fin tube is manufactured from high-quality copper materials such as C1220, C1020, and C1100. They offer excellent thermal conductivity; copper's thermal conductivity at room temperature is approximately 390 W/(m·K)-far higher than that of common stainless steel or carbon steel. Furthermore, the double L-fin structure minimizes contact thermal resistance, helping to reduce both the overall energy consumption of air conditioning units and material costs.
The fin bases of the double L-fin tube overlap, completely encasing the outer surface of the base tube to provide a protective layer of double-strip thickness. This design offers significantly better atmospheric corrosion resistance than standard single L-fin tubes, making it particularly suitable for wet air coolers.
Customized Services
- TORICH offers U-bend and serpentine tube fabrication services, producing U-bends with specific bending radii based on customer drawings.
- Customization options include base tube outer diameters of 12 mm–50 mm and wall thicknesses of 0.8 mm–5 mm, with fin heights of 3 mm–22 mm and fin densities of 8–14 FPI. Precision cutting is available for non-standard lengths ranging from 3 m to 15 m to ensure a perfect fit for equipment installation dimensions.
- Base tube materials include C1220 phosphorus-deoxidized copper, C1100 pure copper, or C7060 copper-nickel alloy (for highly corrosive conditions); fin materials include aluminum or copper to meet the requirements of various media and corrosive environments.
Chemical Composition
| Element | Cu (%) | O (%) | Impurities (%) |
|---|---|---|---|
| C10100 (OFE) | 99.99 min | ≤ 0.0005 | Balance |
| C10200 (OF) | 99.95 min | ≤ 0.0010 | Balance |
| C10300 (OFXLP) | 99.95 min | ≤ 0.0010 | P ≤ 0.0003 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| C10100 | 205–250 | 69–100 | 30–45 | 45–60 |
| C10200 | 215–275 | 70–110 | 30–40 | 55–65 |
| C10300 | 220–290 | 75–120 | 25–35 | 60–75 |
Possible Alternative Grades
- For operating conditions requiring high corrosion resistance, C7060 (90/10 copper-nickel alloy) is a suitable choice; it is used in marine condensers and HVAC systems in coastal areas.
- For temporary structures, small residential air conditioners, and low-load HVAC equipment, 3003 aluminum alloy is an option; while lightweight and cost-effective, it offers moderate heat transfer performance and is prone to oxidation and deformation in high-temperature, high-humidity environments.
- C4430 offers a combination of good corrosion resistance and high strength, making it suitable for condenser tubing in environments with moderately corrosive cooling water; its cost falls between that of C1220 and C7060.
application areas
- Central air conditioning systems: Condensers, evaporators, and cooling coils of centrifugal/screw chillers
- Heat pump systems: Heat exchanger tube bundles (evaporators and condensers) for air-source and ground-source heat pumps
- Lithium bromide absorption chillers: Heat exchanger tubes for generators, condensers, and absorbers
- Refrigeration equipment: Evaporators and condensers for cold storage facilities and ultra-low temperature freezers
- Commercial/industrial air coolers: Wet-type air coolers
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What are the key advantages of double-L finned tubes over standard single-L finned tubes?
A: The double-L structure creates a dual-layer heat transfer interface, increasing the effective heat transfer area by 35%–45%. Additionally, the bond between the tube and fin is tighter; the structure resists deformation and detachment during long-term operation, offering far greater stability than the single-L design.
Q: Why are copper finned tubes preferred over stainless steel ones for HVAC systems?
A: Copper has a thermal conductivity six times that of stainless steel, resulting in significantly higher heat transfer efficiency and substantially lower energy consumption during HVAC system operation. Although the initial procurement cost is slightly higher, the overall cost-performance ratio is far superior to that of stainless steel.
Q: What is the operating temperature range for these finned tubes?
A: The maximum operating temperature for double-L finned tubes is approximately 170°C (with aluminum fins), and the maximum operating pressure can reach 32 MPa. If copper fins are used, the operating temperature can be increased further.
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