We provide the industry standard in fins that are provided on CPI equipment. 

We pressure clean the base tubes before finning to prevent contact interference and to ensure maximum heat transfer and minimum thermal resistance. 

We build L-fins, the most cost efficient type for benign environments and average temperature applications. Our fins are spirally wound under tension, checked for contact integrity, and produced with cast zinc end bands to prevent loss of tension.

Our embedded fins, which are suited for high temperature applications, have the aluminum edge fitted into a spiral groove in the process tube wall. Temperatures in excess of 500F are the most common use of this fin type. 

Extruded fins

Our extruded fins are checked for profile, tension, and bond, included cutting and destroying randomly selected tubes from every production run.

Extruded fins are best for corrosive environments or higher process temperatures requiring alloy inner tubes where cutting into the tube wall is costly. 

Our extruded fins are manufactured from a single piece of outer aluminum tubing. The high pressure, exacting process cuts and raises the multiple fins per inch, while stretching and mechanically bonding the outer aluminum to the inner tube.