Armstrong offers a full line of coils capable of handling virtually any service—from light-duty applications to the toughest and harshest of industrial jobs. And with our custom capabilities, we will literally build a coil to do exactly what you need it to do. No off-the-shelf solutions here. You get the coil you need, not a compromise that happens to be available.

Coils from Armstrong are designed and built to provide long-lasting performance in your heating, cooling and process drying applications. With decades of experience solving problems in the steam loop, Armstrong can offer a system approach to heating and cooling needs. And don’t forget: Armstrong also offers a full line of unit, door and tank heaters.

Longer life in the harshest industrial environments

When it comes to long life under tough industrial conditions, Armstrong is all you need to know about coils. Even in the most severe environments, where coil leaks and corrosion are costly problems, Armstrong coils maintain high efficiency and output.

Armstrong: Why and how

The ability to maintain heat transfer efficiency and resist corrosion—both internally and externally—is why Armstrong coils are uniquely dependable. How we construct them is your assurance of lasting performance, even in severe operating environments.

Leaky coils are a losing proposition, because they are the beginning of the end of efficient heat transfer. Although coils may fail for a variety of reasons, mechanical failure and corrosion are the culprits in the majority of cases. When coils corrode, unwanted moisture and contaminants may foul the air stream or exhaust gases. And a steam leak from a badly corroded coil simply blows precious energy off into the atmosphere.

External corrosion. Contaminants in the air steam cause external corrosion. Dirt buildup intensifies corrosive action by trapping contaminants in concentrated pockets. And it’s accelerated when dirt becomes strong airborne mist. Factors such as inappropriate fin pitch, fabricating techniques and material selection may also fuel external corrosion.

Internal corrosion. Retention of contaminated condensate and inadequate venting of non-condensable gases are major causes of internal corrosion. When CO₂ dissolves in condensate that has cooled below steam temperature, it forms highly corrosive carbonic acid. Likewise, oxygen left to stagnate in the system fosters corrosive action by pitting iron and steel surfaces. Joining pipes/tubes in headers of dissimilar materials may spawn galvanic action. Internal stresses resulting from improper welding may also hasten corrosion damage.

Armstrong to the rescue

Armstrong’s up-front help in coil selection and design is one of the best defenses against external corrosion. We offer a wide selection of fin pitches to help combat dirt buildup. What’s more, sturdy fins lend extra strength to withstand high-pressure cleaning without damage or distortion. As a defense against non-environmental factors, Armstrong fabricates coils in a full range of metals and alloys. You may also specify special coatings to increase external corrosion resistance.