Pure copper finned tubes come in various fin designs, commonly including spiral-wound fins, press-fit fins, and rolled fins.

1. Spiral-wound fins are created by spirally winding a copper strip onto the base tube using specialized equipment. The advantage of this design is the large contact area between the fins and the base tube, resulting in low contact thermal resistance and high heat transfer efficiency. The production process is relatively mature and cost-effective, making it suitable for applications requiring high heat transfer efficiency and strict cost control.

L-type Fin Tube Copper Tube Copper Fins Manufacturers – Cangzhou Datang Steel Pipe Co., Ltd.

2. Press-fit fins are made by first stamping the fins into perforated sheets, then fitting them onto the base tube, and finally using mechanical or hydraulic expansion to ensure a tight fit between the fins and the base tube.

Oval finned tubes Copper Sleeve-Type Finned Tubes

The advantage of press-fit fins is that the fin shape and size can be flexibly designed to meet different heat transfer requirements. The fin arrangement can also be more regular, which helps optimize fluid flow and improve heat transfer efficiency. However, if the process control is not precise, there may be some contact thermal resistance between the fins and the base tube.

3. Rolled fins are created by directly rolling the copper material on the surface of the base tube using a rolling mill.

Copper Extruded Finned Tube Rolled fins

Low threaded finned tubes for condensers and evaporators

This type of fin is integrally formed with the base tube, eliminating contact thermal resistance and resulting in very smooth heat transfer and high heat transfer efficiency. The fins also have good strength and can withstand significant fluid impact. However, the production process for rolled fins is relatively complex and costly, and they are generally used in applications requiring very high heat transfer performance.