Dunn is best known as an emergency repair shop, but we also engineer and fabricate shell and tube type heat exchangers of all sizes. We have the facilities, lifting capacity, equipment, and a team of experienced craftsmen ready to handle all your heat exchanger needs. Whether the demands include cleaning, repairing, retubing, replacing or designing and fabricating brand new equipment, we can deliver. Capable of operating 24/7, we are ready to respond to your needs day or night.
Dunn Heat Exchangers, Inc. meets the most stringent welding requirements. We are capable of the fabrication and repair of most materials. Our heat exchanger fabrication process employs welding techniques such as Submerged Arc Welding (SAW), Gas Tungsten Arc Welding (GTAW), Gas Metallic Arc Welding (GMAW), and Shielded Metallic Arc Welding (SMAW), and more. We maintain more than 120 American Society of Mechanical Engineers (ASME) qualified welding procedures. For your specific welding requirements, please contact our Quality Assurance and Inspection Unit.
Our Quality Assurance (QA) department ensures that fabrication and repair needs meet the latest code requirements of ASME codes and Tubular Exchanger Manufacturers Association (TEMA) codes for heat exchangers. QA also helps customers determine the repairs required to return equipment to service as quickly as possible, minimizing critical unit downtime. Members of our QA personnel are certified by the American Society of Non-Destructive Testing (ASNT) SNT-TC-1A, American Petroleum Institute (API) 510, and American Welding Society AWS - CWI - CWE and in accordance with those standards.