Intgrally Finned Tubes

Developed as a method of increasing heat tranfer performance of fluids whilst minimising the physical size and cost of the heat exchanger. The fin is produced by being rolled from the wall of the tube and is therefore integral with the tube itself. Due to fin rolling the wall thickness between the finned section is reduced compared to the plain ends. The bore of the finned section is slightly reduced.

Most tubular materials can be finned, however hardness of the material usually determines the finning code or the fin profile. Harder materials such as stainless steel, nickel alloys and titanium are usually supplied with a greater fin density (28, 30 or 36 fins/inch). Plain ends and any skipped sections must be specified.

Finished tubes can be U bent if required. The U bend area can be either finned or plain, to meet the required specification