SA334 Gr1 EXTRUDED FINNED TUBE FOR HEAT EXCHANGER

Extruded Fin Tube Product Description:

In heat exchangers, fluid types, heat transfer surface areas, fluid velocity ve pressure play an important role. In order to increase the heat transfer surface area on tubes, fins are formed by extrusion on tubes.

Extrusion is the process of forming fins in specified thickness, height and pitch by extruding tube outer surface with special machines. By this means, the heat transfer surface of the tube can be increased. The problems caused by increasing heat transfer area more than necessary and by extension the height of the fins formed, are identified by studies made and by experience. Therefore fins are designed in most suitable way to the process.

Product selection is made by considering client requirements and places of product utilization with the calculation of efficiency and optimal product costs. For the product selection, alternative solutions are presented by taking environmental conditions and safety rules into account.

Integral extruded serpentines are generally used in cascade type condensing boilers and boilers. Serpentines that are aluminium extruded on tubes are used in hygienic hot air generators. They can also be used as Heat Exchanger in air cooled condenser, oil and steam applications.

Extruded Finned Tube Manufacturing Process:

The Extruded Fin Tubes are produced by compressing an aluminum tube, or sleeve, onto the base tube. The bloom is exposed to very high pressures which essentially "grows" the fins into the final fin profiles.This process manufacture an excellent strong joint with great resistance (fin stiffness) as well as exceptional heat transfer capabilities (longevity, temperature range). The advantage of extruded fin tubes are full protection of bare tube against corrosion and fin has high mechanical strength. Extruded finned tubes provide the most stable performance over time as compared to the other fin types. The fin is rolled from an outer aluminum tube by a process using pressure to create a rolled "pressure bond" between the liner tube and fins. The aluminum fin material completely encloses the tube, except at the ends where a tube coating can be applied.

Extruded Fin Tubes Advantages:

Easy to clean with a high-pressure water jet without deforming the fins

The tube is not mechanically stretched to adhere to the fins

Uniform and reliable heat transfer

No galvanic corrosion between the tube and fins

The fins are vibration resistant

Perfectly suited to industrial applications

Unequalled quality/price ratio for demanding applications

Extruded Aluminum Tubing Properties:

No galvanic corrosion at the base of the fins

Rugged fins, resistant to high-pressure cleaning, causing no warping or bending

Superior heat transfer capacity for the lifetime of the unit

Tubes can be shipped and cut to length and stripped at each end

Optional reducing sleeves (bell) at the end of tubes

Extended warranty available for heat exchangers using these tubes

Aluminum Extruded Tubing Applications：

Extruded finned tubes are used in high temperature conditions and corrosive atmospheric conditions such as:

operating temperatures less than 300°C;

offshore or other remote applications;

heat pipes;

dry air coolers for air, gas or oil;

air to air heat exchangers for HVAC applications;

air dehumidification in air treatment plants and energy recovery in air exhaust system.

Extruded Aluminum Tube Specifications：