SpiralEdge™ Fin Tubes
Integral finned tube solutions with increased surface area for higher heat transfer
Tube Tech® is India's largest manufacturer of integral finned tubes, with the widest range of sizes, materials and fin densities. We manufacture integral fin tubes with superior dimensional control in Copper, Brass, Cupro Nickel & Stainless Steel tube materials for a wide variety of heat transfer applications.
SpiralEdge™ Fin Tubes are formed by a rolling process which raises fins in a continuous spiral on a straight length of tubing. This produces a fin tube with a greatly increased surface area of known dimensions which is completely integral. Tube Tech® produces finned tubes from precision-made smooth tubes with superior dimensional control, in a wide variety of material combinations.
During the finning operation the inside diameter of the base tube is reduced and simultaneously helical fins are rolled out of the tube wall. A key advantage of this finning procedure is that the finning operation can be interrupted at any point of the tube, allowing plain ends and intermediate landings as required. These unfinned sections make it possible to support and fit finned tubes in shell-and-tube heat exchangers in the same way as plain tubes.
SpiralEdge™ Fin Tubes also include internally enhanced options (internal ridges/grooves) to significantly improve in-tube heat transfer, as well as specialised condenser and chiller tube geometries for demanding refrigeration and process applications.
Key Features
- • Integral helical fins formed by rolling for increased surface area and consistent geometry
- • Fin density capability across a wide range (typically 11 to 56 FPI, as applicable by type)
- • Available with or without internal ridges / grooves (for enhanced internal heat transfer)
- • Plain ends standard; intermediate landings can be provided on request
- • Finning operation can be interrupted at any point for mounting/support requirements
- • Produced in Copper, Brass, Cupro Nickel & Stainless Steel materials
- • Supplied in “as finned” condition; Brass/Cupro Nickel/Stainless Steel can be supplied in “annealed” temper upon request
- • Supplied with deburred / smooth ends
Applications
SpiralEdge™ Fin Tubes Varieties - Technical Specifications
| Fin Tube Type | Tube Diameter | Tube Thickness | Fin Density | Fin Depth | Tube Length |
|---|---|---|---|---|---|
| Integral Fin Tubes | 9.52 – 42.00 mm | 0.90 mm+ (wall) | 11 – 56 FPI | Up to 2.5 mm+ (by type) | Up to 12 Mtrs |
| Corrugated Fin Tubes | 7.90 – 38.10 mm | 0.50 – 2.11 mm | Pitch: 3 – 12 mm | 0.5 – 1.2 mm height | Up to 10 Mtrs |
| Turbo Chill Tubes | 12.70 / 15.87 / 19.05 mm | 1.20 mm+ (typ.) | 19 / 22 / 26 / 40 | Integral low fins + internal ridges | Up to 8 Mtrs |
| End Cross Fin Tubes | 12.70 / 15.87 / 19.05 mm | As low as 0.55 mm | 26 FPI | Increased fin height (trapezoidal) | Up to 8 Mtrs |
| Condenser Tubes | 15.87 / 19.05 mm | 1.07 – 1.47 mm | 40 / 42 / 48 | Low fins + internal ridges | Up to 8 Mtrs |
| Internally Finned Tubes | Up to 25.40 mm (OD) | Root wall: 0.30 – 0.63 mm | 50 – 70 internal ridges | Ridge height: 0.20 – 0.30 mm | Up to 6 Mtrs |
| Finned Cooling Coils | Typically 15.9 & 19.05 mm | As required | 11 FPI (medium/high fin) | 2.5 mm+ (fin depth) | Coils as required |
| Finned U-Bent Tubes | 9.52 – 25.40 mm | 1.00 mm+ (wall) | As per fin tube type | Bend portion left unfinned | Leg length up to 8 Mtrs |
* Integral fin tubes: fabricated in alloy C12200 to meet chemical, mechanical and other test parameters of ASTM B 75 / B 359.
* Copper alloy integral fin tubes (e.g., 44300 / 68700 / 70600 / 71500) and stainless steel (SS 304, SS 316, SS 316L) can be produced to meet applicable chemical/mechanical test requirements of ASTM B 111 / SB 359. BS EN, JIS and DIN standards are available on request.
* Turbo Chill tubes: integral low fins with internal spiral ridges (commonly 8 & 10 ridges configuration; other ridge counts available on request).
* Condenser tubes: integral low fins on OD with internal helical ridges; smooth bore can be produced on request where applicable.
* For calculation of surface area (fin tubes / turbo chill / condenser tubes), please contact us.
Frequently Asked Questions
What fin densities can you make?
+
SpiralEdge™ Fin Tubes are available from 11 to 56 fins per inch (FPI), depending on tube type, material and size. Other fin densities can be made on request.
What sizes and lengths are available?
+
Integral fin tubes are made from 9.52 mm to 42 mm OD, in lengths up to 12 m. Corrugated tubes run from 7.90 mm to 38.10 mm OD, and inner grooved tubes go up to 25.4 mm OD.
Which materials are available?
+
Copper, brass, cupronickel and stainless steel. Annealed tubes can be supplied on request for selected materials.
Can fin tubes have plain ends and unfinned sections?
+
Yes. SpiralEdge™ Fin Tubes are normally supplied with plain ends. Intermediate landings (unfinned sections) can be added so the tubes fit tube sheets and baffles just like plain tubes.
What is the difference between outer fin and inner grooved tubes?
+
Outer fin tubes have integral fins rolled on the outside to increase surface area on the shell side. Inner grooved tubes have a plain outside and internal ridges that give 2 to 3 times the inside heat transfer of a smooth tube, which makes them ideal for DX evaporators.
Which standards do you follow?
+
Copper integral fin tubes are made to ASTM B75 and B359. Copper alloy and stainless steel fin tubes are made to ASTM B111 and SB 359. BS EN, JIS and DIN standards are available on request.