Used 3695 Sq. Ft. Horizontal Reco Industries lnconel Shell & Tube Heat Exchanger. Stainless steel shell rated 120 psi @ 550 F on the shell, and Inconel tubes rated 135 psi @ 650 F. Serial # H-5240, National Board #3137, Built 1971. Repaired - 1984. Previous Use: Nitric Acid - Tail Gas Heater