The Super Radiant Coils economizer for process heating is made with 2.0″x 0.105 wall carbon steel pipe with 0.75″ high fins, 0.05 thick. The fins are attached via high-frequency resistance weld, produced at 5 fins per inch. The flanges are 600# raised face weld necks (3) and are equipped with 3000# threaded couplings (3). The bottom of the unit has 9 drains manufactured with 1.0″ Schedule 80 Carbon steel pipe. These drain pans are critical, as the unit is installed with the tubes oriented vertically, and they allow each circuit to be drained individually.