Condenser Low Fin Tubes are heat exchanger tubes with a low, closely spaced integral fin on the outer surface and, in many designs, an internally ridged or rifled bore, purpose built for condensing and evaporating duty rather than general heat transfer. The external low fin increases the condensing surface area facing the process fluid, while the internal ridges induce turbulence in the water or refrigerant flowing through the tube, and both effects together raise the overall heat transfer coefficient compared with a plain tube. Condenser Low Fin Tubes are most commonly supplied in copper and copper nickel for their corrosion resistance and thermal conductivity, though admiralty brass, aluminium brass are also used depending on the process fluid. Amardeep Steel Centre manufactures Condenser Low Fin Tubes for refrigeration, HVAC and process condenser applications in the base tube material and fin configuration each project requires.
Technical Data
Specifications of Condenser Low Fin Tubes
| Specification Feature | Standard Range / Available Options |
|---|---|
| Product Type | Condenser Low Fin Tube (Integrally Finned with Internal Enhancements) |
| Base Tube Outer Diameter (OD) | 15.88 mm to 25.40 mm (5/8" to 1") |
| Wall Thickness Under Fin | 1.00 mm to 2.45 mm |
| Fin Density | 26 to 40 Fins Per Inch (FPI) |
| Fin Type | Integral Low Fin (Smooth or Internally Rifled / Helical Grooved) |
| Internal Enhancement | Smooth Bore, Internally Ridged, or Rifled / Spiral Micro-Fin |
| Base Tube Materials | Copper (UNS C12200), Copper Nickel (UNS C70600), Admiralty Brass (UNS C44300), Aluminium Brass (UNS C68700), Stainless Steel |
| Applicable Standards | ASTM B75, ASTM B359, ASTM B111, ASME SB359, ASME SB111 |
| Tube Lengths | Straight lengths up to 8 meters (custom cut lengths available) |
| Testing & Quality Assurance | Hydrostatic Testing, Pneumatic Air-Under-Water Testing, Eddy Current Test, Mechanical Properties Verification |
Chemical Compositions of Condenser Low Fin Tubes
| Material Grade | Specification | Cu (%) | Ni (%) | Fe (%) | Mn (%) | Zn (%) | Pb (%) max | Sn (%) | P (%) |
|---|---|---|---|---|---|---|---|---|---|
| Copper UNS C12200 | ASTM B75 / B359 | 99.90 min | — | — | — | — | — | — | 0.015 – 0.040 |
| Cu-Ni 90/10 UNS C70600 | ASTM B111 / B359 | Balance | 9.0 – 11.0 | 1.0 – 1.8 | 1.0 max | 1.0 max | 0.05 | — | — |
| Admiralty Brass UNS C44300 | ASTM B111 | 70.0 – 73.0 | — | 0.06 max | — | Balance | 0.07 | 0.9 – 1.2 | 0.02 – 0.10 (As) |
| Aluminium Brass UNS C68700 | ASTM B111 | 76.0 – 79.0 | — | 0.06 max | — | Balance | 0.07 | Al: 1.8 – 2.5 | 0.02 – 0.10 (As) |
Condenser Low Fin Tubes Mechanical Properties
| Material Grade | Temper / Condition | Tensile Strength, Min (MPa / ksi) | Yield Strength, Min (MPa / ksi) | Elongation in 2 in. / 50mm, Min (%) | Hardness (Rockwell / HRF) |
|---|---|---|---|---|---|
| Copper UNS C12200 | Light Annealed (O61) | 205 / 30 | 62 / 9 | 40 | 65 HRF max |
| Copper UNS C12200 | Hard Drawn (H80) | 310 / 45 | 250 / 36 | 6 | 80 HRF min |
| Cu-Ni 90/10 UNS C70600 | Light Annealed (O61) | 275 / 40 | 105 / 15 | 30 | 70 HRF max |
| Cu-Ni 90/10 UNS C70600 | Hard Drawn (H80) | 415 / 60 | 345 / 50 | 3 | 85 HRF min |
Equivalent Grades of Condenser Low Fin Tubes
| Material Description | UNS Designation | US / ASTM Standards | EN Standards | BS Standards | DIN Standards | JIS Standards |
|---|---|---|---|---|---|---|
| DHP Copper | C12200 | ASTM B75 / B359 | Cu-DHP (CW024A) | BS 2871 Cu106 | DIN 1787 SF-Cu | JIS H3300 C1220 |
| Copper Nickel 90/10 | C70600 | ASTM B111 / B359 | CuNi10Fe1Mn (CW352H) | BS 2871 CN102 | DIN 17664 CuNi10Fe1Mn | JIS H3300 C7060 |
| Admiralty Brass | C44300 | ASTM B111 | CuZn28Sn1As (CW706R) | BS 2871 CZ111 | DIN 17660 CuZn28Sn1 | JIS H3300 C4430 |
| Aluminium Brass | C68700 | ASTM B111 | CuZn20Al2As (CW702R) | BS 2871 CZ110 | DIN 17660 CuZn20Al2 | JIS H3300 C6870 |
Dimensions chart of Condenser Low Fin Tubes
| Tube Nominal OD (mm) | Base Wall Thickness (mm) | Fin Density (FPI) | Fin Outer Diameter (mm) | Fin Depth / Height (mm) | Root Diameter (mm) | Wall Thickness Under Fin (mm) |
|---|---|---|---|---|---|---|
| 15.88 (5/8") | 1.24 | 26 | 15.75 – 15.88 | 0.89 | 13.97 | 0.90 |
| 15.88 (5/8") | 1.24 | 28 | 15.75 – 15.88 | 0.85 | 14.05 | 0.92 |
| 19.05 (3/4") | 1.24 | 26 | 18.90 – 19.05 | 0.95 | 17.15 | 0.95 |
| 19.05 (3/4") | 1.65 | 28 | 18.90 – 19.05 | 0.90 | 17.25 | 1.10 |
| 19.05 (3/4") | 1.65 | 30 | 18.90 – 19.05 | 0.85 | 17.35 | 1.15 |
| 25.40 (1") | 1.65 | 28 | 25.25 – 25.40 | 1.10 | 23.20 | 1.20 |
| 25.40 (1") | 2.11 | 36 | 25.25 – 25.40 | 0.95 | 23.50 | 1.45 |
| 25.40 (1") | 2.45 | 40 | 25.25 – 25.40 | 0.80 | 23.80 | 1.65 |
Condenser Low Fin Tubes Weight Chart
| Nominal OD (mm / inch) | Fin Density (FPI) | Wall Thickness Under Fin (mm) | Copper UNS C12200 (kg/m) | Copper UNS C12200 (lb/ft) | Cu-Ni 90/10 UNS C70600 (kg/m) | Cu-Ni 90/10 UNS C70600 (lb/ft) | Admiralty Brass C44300 (kg/m) |
|---|---|---|---|---|---|---|---|
| 15.88 (5/8") | 26 | 0.90 | 0.42 | 0.28 | 0.41 | 0.28 | 0.40 |
| 15.88 (5/8") | 28 | 0.92 | 0.44 | 0.30 | 0.43 | 0.29 | 0.42 |
| 19.05 (3/4") | 26 | 0.95 | 0.56 | 0.38 | 0.55 | 0.37 | 0.54 |
| 19.05 (3/4") | 28 | 1.10 | 0.63 | 0.42 | 0.62 | 0.42 | 0.60 |
| 19.05 (3/4") | 30 | 1.15 | 0.66 | 0.44 | 0.65 | 0.44 | 0.63 |
| 25.40 (1") | 28 | 1.20 | 0.95 | 0.64 | 0.94 | 0.63 | 0.91 |
| 25.40 (1") | 36 | 1.45 | 1.12 | 0.75 | 1.10 | 0.74 | 1.07 |
| 25.40 (1") | 40 | 1.65 | 1.26 | 0.85 | 1.24 | 0.83 | 1.20 |
Need Condenser Low Fin Tubes in a specific fin density or with internal rifling for your condenser design? Share your tube sheet drawing and we will confirm feasibility and lead time within 24 hours.
Request a QuoteApplications and Industrial Uses of Condenser Low Fin Tubes
- Refrigerant Shell-and-Tube Condensers
- Industrial Water-Cooled Chillers
- Refrigeration Evaporators
- HVAC Condensing Units
- Sugar Industry Evaporators and Condensers
- Oil and Gas Process Coolers
- Petrochemical Condensers and Reboilers
- Marine Cooling Systems and Heat Exchangers
Frequently Asked Questions
What are Condenser Low Fin Tubes?
Condenser Low Fin Tubes are heat exchanger tubes with small, closely spaced fins formed on the outer surface to improve heat transfer.
How do Condenser Low Fin Tubes improve heat transfer?
They increase the external surface area of the tube, allowing more efficient heat transfer between the refrigerant, steam, or cooling fluid.
How are Condenser Low Fin Tubes manufactured?
They are commonly manufactured by mechanically rolling or forming the outer wall of a plain tube to create integral low-height fins.
What is the difference between Low Fin Tubes and Plain Tubes?
Low Fin Tubes have external fins that increase heat transfer area, while Plain Tubes have a smooth outer surface.
What materials are used for Condenser Low Fin Tubes?
They are available in copper alloys, aluminium alloys, carbon steel, and stainless steel, depending on application requirements.
Are Condenser Low Fin Tubes suitable for shell-and-tube condensers?
Yes, they are suitable for shell-and-tube condensers where increased heat transfer surface area is required.
Can Low Fin Tubes be used in refrigeration and chiller systems?
Yes, Low Fin Tubes are used in refrigeration systems, chillers, evaporators, and condensers, depending on the equipment design.
Are Condenser Low Fin Tubes suitable for seawater and marine applications?
Yes, selected corrosion-resistant alloys, such as aluminium brass and cupronickel, can be suitable for marine and seawater applications, subject to operating conditions.
