Unused 327 sq. ft. Carbon steel heat exchanger. Mfg. by Fabsco shell and Tube. 1.1 Design duty (MMBTU/Hr). Shell Design Rating: 400/FV psi @ 300 deg. F. Tube Design Rating: 310 psi @ 150 deg. F. Shell mawp 415/FV psi @ 380 deg. F. Tube mawp 400 psi @ 150deg. F. 15.375" X 170. Serial #S21-13258-11. National Board #11405. Built 2023. Lean Oil Cooler. Under Nitrogen Purge