Heat Exchanger, Type 500, Straight Tube, 4 Pass, Dia.shell: 5-1/4 in, Shell:Steel pipe or Tubing, Tubes:Cu,Admiralty or 90/10CuNi, Bonnets: CI, Tubesheets: SS or 90/10CuNi, Baffles: CS, Gaskets: Compressed Fiber, ASME,TEMA-C