Used 20 Square Feet Pfaudler Tantalum Horizontal Heat Exchanger. Shell rated 150 psi and full vacuum @ 450 F, tubes rated 150 psi @ 450 F. Type BEM 06-66. 89 1/2” OAL. (19) ¾” tubes, 0.015” thick, (Tantalum 2.5% w). (2) 1 1/2” inlet/outlet, (2) 3/4” vent/drain, (2) 3” inlet/outlet. Serial #J022725, National Board #49469, Built 1998. Weight – 334 lbs. Previous Use: API Pilot Plant.