USED APPROXIMATELY 14 SQFT MONTICELLO HASTELLOY HORIZONTAL HEAT EXCHANGER. HASTELLOY SHELL (SB-619-C276) RATED 100/FV @ -20/+500 DEGREES F. HASTELLOY TUBES (SA-626-C276) RATED 150/FV @ -20/+250 DEGREES F. TUBES ARE SA-214, SHELL SA-53B “U” TUBE TYPE 4-PASS DESIGN. 12 TUBES, .75? OD AVG. (1) 2" INLET, (1) 2" OUTLET, (1) 4" INLET, (1) 4" OUTLET. SERIAL # T103113, NB # 5528. BUILT 1994.