Extruded fin tube is a fin tube made by rolling aluminum tube and steel tube or stainless steel tube. It has the characteristics of efficient heat transfer, wear resistance and high temperature resistance.

The basic structure of aluminum extruded fin tube is to put the aluminum tube tightly on the base tube, and form fins through machine extrusion. The base of the fin fits tightly with the outer wall of the tube. This structure prevents it from breaking or melting at high temperature.

Extruded finned tube manufacturing process

The manufacturing process of extruded fin tube includes the following steps:

Extruded fin tube raw material selection: Aluminum tube is obtained by heating and die extrusion using aluminum rods.

Rolling: The aluminum tube is tightly put on the base tube and fins are formed by machine extrusion.

Surface treatment of extruded fin tube: Anti-rust paint or silver powder is usually applied on the surface of the fin to enhance its corrosion resistance and aesthetics.

Working principle of extruded fin tube heat exchangers

The working principle of extruded fin tube is mainly based on its unique structure and manufacturing process. On the extruder, the pre-treated material is fed into the extrusion die, which is designed with a cavity that matches the shape of the fin. When the material is subjected to strong extrusion force in the die, its shape gradually changes, and it is finally extruded into a fin shape that matches the die cavity. After the fin is formed, it is assembled with the base tube to form a complete extruded fin tube.

When the hot fluid flows in the tube, the cold fluid flows between the fins. Due to the presence of the fins, the heat transfer area outside the tube is greatly increased, so that the heat can be transferred to the fins more quickly, and then transferred to the cold fluid through the fins, thereby achieving efficient heat exchange.

Application scenarios of extruded aluminum finned tube

Extruded fin tubes are widely used in various industrial fields, including electricity, chemical industry, metallurgy, etc. Its efficient heat transfer and corrosion resistance make it perform well in heat exchange equipment and can work stably under high temperature and harsh environment. In addition, aluminum extruded fin tubes are also not easy to accumulate dust and scale, and are suitable for drying heating and other heat exchange occasions.

In the petrochemical industry, extruded finned tubes can be used in heating furnaces, heat exchangers and other equipment;

In the refrigeration industry, they can be used in evaporators, condensers and other equipment;

In thermal power plants, they can be used in boiler water-cooled walls and other equipment.

Extruded finned tubes can also be used in drying operations in the wood, food, paper and other industries to provide uniform hot air and achieve efficient drying.

Extruded finned tubes have the following main features:

‌High strength‌: Able to withstand high pressure and load.
‌High temperature resistance‌: Suitable for heat exchange in high temperature environments.
‌Corrosion resistance‌: Able to remain stable in corrosive environments.
‌Wear resistance‌: Has a long service life.
‌Large heat transfer area‌: Due to the presence of fins, the heat transfer area is increased and the heat transfer efficiency is improved‌.

As an important heat exchange element, extruded finned tubes play an important role in the industrial field. With the continuous advancement of technology and the continuous expansion of application fields, its market prospects will be broader.

Datang fin tube product’s specification outside diameter from 18 mm to 273 mm finned tube, The process includes high-frequency welded fin tubes, extruded fin tubes, L / L L / K L fin tubes, G -type Embedded fin tubes, low fin tubes, inner fin tubes, elliptical fin tubes, longitudinal fin tube,H type fin tube, the annual capacity can reach 100,000 tons.

We have professional engineer support, high efficiency sales team and competitive price superiority.

Our R & D department provides the strong technical support and enables us to receive some, O D M projects, and can provide you with drawings, design plans and thermal calculations, service has exceeded more than 3000 enterprises.
If you need finned tubes, contact us! Email:info@datangpipe.com,Whatsapp:+86 15690122018