Integral Finned Tube

Low Finned tube is a finned tube obtained through plastic cold deformation.

The method consists in realizing, from a smooth tube, fins with a particular geometric form without removing material; this plastic deformation causes an increment of heat exchange efficiency, and allows to reduce the heat exchanger size.
 

Condenser Tube "Y-fin"  

Evaporator Tube "T-fin"

Inner Grooved (IG) Low Fin Tube    

Inner Grooved (IG) Y-Fin / T-fin Tube

Titanium Low Fin Tube for sale
 

Corrugated Stainless Steel Tube

Extruded Low Fin Tubes

Stainless Steel Tube Integral Low Fin Tube

Copper Finned Tube Integral Low Fin Tube

High Performance Copper Pipe Corrugated Fin Tubes

Condenser Low Finned Tubes

SMLS Titanium integral low finned tube

Copper Fin Tubes in Small Dimension

C12200 Copper Low Fin Tube Inside and Outside Surface

Manufacturing process

The fins are rolled out of outer wall of the plain tubes by a pass roller. Tubes and fins are in same piece tube.

Applications

The Integral Low Finned Tubes find the preference in the following industrial sectors:

1. Heating systems;

2. Ventilation systems;

3. Refrigeration and climate control systems;

4. Mechanical engineering;

5. Automotive manufacturing;

6. Chemicals and pertrochemical and power plant technology.

Base tube diameter  12.7mm-25.4mm

Base tube wall thickness  1.65mm-3.0mm

Fin thickness   0.3mm-0.5mm

Fin pitch  0.9mm-1.5mm

Fin height   0.9mm-1.3mm
 

Base tube material: Stainless steel, Carbon steel, Alloy, Titanium, Nickel, Copper etc.

Developed as a method of increasing heat transfer 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 beneath the finned section is reduced compared with the plain ends. The bore of the fin section is slightly reduced.  Most tubular materials can be finned, however hardness of the material usually determines the finning code or 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).  This shallower fin profile reduces work hardening of the material and helps eliminate the possibilty of fin root cracking.

Softer materials such as carbon steel, copper and copper alloys are usually supplied with a deeper profile giving a lower fin density (16 or 19 fins / inch).

Plain end lengths and any intermediary unfinned 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.

MANUFACTURING LIMITATIONS

Materials:

1. Carbon and low alloy steel

2. Stainless steel: TP304 / TP304L / TP316 / TP316L / TP321 and duplex

3. Copper alloys: Alloy 443 / 687 / 706 / 715 etc

4. Titanium and high nickel alloys

SURFACE AREA IMPROVEMENT

Typical surface area improvements by using integral low finned tubes are:

1. 19.05mm OD with 19 fins / inch: 270%

2. 25.4mm OD with 26 fins / inch: 330%

Depending on the fluids within the heat exchanger the thermal performance improvement can range from between 20% to in excess of 100%