SpiralEdge™ Fin Tubes
Integral finned tube solutions with increased surface area for higher heat transfer
Tube Tech® manufactures integral fin tubes with superior dimensional control in Copper, Brass, Cupro Nickel, Stainless Steel & Carbon 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™ also includes 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 — increased surface area, consistent geometry
- • Fin density capability across a wide range (typically 16 to 48 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 & Carbon Steel materials
- • Supplied in “as finned” condition; Brass/Cupro Nickel/Carbon Steel/Stainless Steel can be supplied in “annealed” temper upon request
- • Supplied with deburred / smooth ends
Applications
SpiralEdge™ Fin Tube 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 – 42 FPI | Up to 2.5 mm+ (by type) | Up to 10 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 other tube materials (SA 179, 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.