The fin strip is shaped into an L and wound onto the tube surface under tension. Advantages: Core tube extensively protected against corrosion by the fin foot, finning of very thin-walled tubes possible.

Material Combinations:

- Core Tube: Carbon steels low-alloy steels, stainless steels, brass, copper, copper-nickel alloys, aluminum bronze, nickel-alloys (Alloy 400 ext.), bimetal, titanium, and others

- L Fin Tube Fins: Aluminium, Copper

Fields of Application:

• petroleum, chemical, and petrochemical industries

• natural gas treatment

• steel industry: blast furnace and converter systems

• power generation: steam turbine exhaust condensing

- contact condensing with cooling of circulating condensate

- fossil and nuclear power plants

• air conditioning (freon, ammonia, propane)

• incineration of household refuse

• compressor coolers, etc.

Manufacturing Process:

The manufacturing strip is folded from an L shape and then wound around the base tube. The feet of the fins are joined together and cover the whole of the finned surface. Both ends are clamped down to avoid unrolling through damage.

Advantages:

Economic: This method of manufacturing enables us to place the finning on a very thin-walled tube with is particularly desirable when using high-value alloys (titanium, stainless, copper, nickel). The tube can withstand a temperature of up to 130°C without the risk of atmospheric corrosion or thermal stress.

In order to forward you a prompt offer we would be pleased to receive your detailed inquiry containing:

• Base tube material and quantity

• Base tube size

• Fin material

• Fin type

• Fin diameter or height

• Fin thickness

• Fins per inch, meter, or fin pitch

• Lenght of plain, unfinned ends 

(necessary to roll or weld the tubes into tubeplate or assembly)