Which fin type should we specify?

It is set by the gas-side temperature and the cleaning regime. Wrapped L / LL foot fins suit ambient air-cooled duty, extruded fins give a full bi-metallic cover to around 300 C, embedded G-fins hold to about 400 C, and HF welded steel fins or studded tube are used above that and where ash fouling means the surface has to be cleaned mechanically.

What core tube materials are available?

Carbon steel A179, A192 and A210, austenitic stainless 304L, 316L and 321, duplex, Cr-Mo grades T11 to T91, and nickel alloys such as 800HT and 825 where the process side is corrosive.

Can you match our existing bundle?

Yes. Send the tube OD and wall, fin height, fins per inch, fin material, finned length and bare ends, or the old tube sample details, and we will reproduce the geometry so the new tubes drop into the existing bundle.

How is the fin bond verified?

Each batch is checked for fin pull-off strength and fin count, the core tube is hydrostatically tested before finning, and a dimensional report plus EN 10204 3.1 certification is issued with the delivery.

Finned Tubes (Fintubes)

Name: Finned Tubes (Fintubes)
SKU: finned-tubes
Availability: InStock

Extended surface tubing for air-cooled and recovery duty

Stock statusMade to specification

Typical lead time4 - 8 weeks depending on fin type and quantity

Finned tubes — fintubes — that multiply the heat transfer surface of a bare tube by five to twenty times, so air-cooled exchangers, economisers and waste heat recovery units can be built smaller. Supplied as extruded, embedded (G-fin), high frequency welded, wrapped L / LL / KL foot and studded tube, with the fin material and bond type matched to the gas-side temperature and fouling.

Five to twenty times the surface area of a bare tube
Fin type selected against gas-side temperature, fouling and cleaning method
Core tube supplied in carbon, stainless, duplex, Cr-Mo or nickel alloy
Fin bond pull-off testing and core tube hydro reports on every batch

Types & configurations

Type	Specification
Extruded finned tubes	Aluminium muff extruded over the core tube, full bi-metallic cover, up to 300 C gas side
Embedded (G-fin) tubes	Fin rolled into a machined groove in the tube wall, mechanically locked, up to 400 C
High frequency welded fins	Solid or serrated steel fin HF welded to the tube, up to 500 C and higher with alloy fin
Wrapped L / LL / KL foot fins	Tension-wound aluminium fin, economical for ambient and low temperature duty
Studded tubes	Welded studs for heavy fouling and ash-laden flue gas in fired heaters
Longitudinal finned tubes	Welded longitudinal fin for double-pipe and viscous-fluid exchangers

Specifications

Property	Value
Core tube	Carbon steel, A179 / A192 / A210, stainless 304L / 316L / 321, duplex, Cr-Mo and nickel alloys
Fin material	Aluminium 1060 / 1100, carbon steel, stainless steel and copper
Fin geometry	Fin height 9 - 25 mm, 3 - 11 fins per inch, solid or serrated
Core tube size	15.88 mm to 50.8 mm OD typical, lengths to 18 m
Testing	Hydrostatic test on the core tube, fin bond and pull-off test, dimensional and fin count check

Typical applications

Air-cooled heat exchangers and fin-fan coolers

Economisers and waste heat recovery units

HRSG and boiler economiser sections

Fired heater convection sections (studded tube)

Gas coolers, air heaters and process heaters

District cooling and HVAC coils

Frequently asked

[ 02 ] Other industrial products

Valves

Process and project valves supplied to specification

Tungsten Carbide Studs

HPGR and crusher wear protection

$Refractory Materials$

Refractory Materials

Linings for kilns, furnaces and high-temperature plant

Heat Exchanger Tubes

Shell and tube bundles supplied to the TEMA sheet

Boiler Tubes

Water wall, superheater and reheater tubing

BA Finish Tubes

Bright annealed tubing for clean and instrument service

Download Datasheet AR