Used 4372 sq ft stainless steel shell and tube heat exchanger. Manufactured by Southern Heat Exchangers. (514) 430 Stainless steel tubes, 1 1/4” dia x 307” long, rated 160psi @450F. Carbon steel shell rated 305 psi @650F. 321 stainless steel single head. Openings shell (2) 12", (1) 10", (1) 4", tubes (1) 22-1/2". Saddle mounted. NB #12268, Serial #03-407. Built 2005. No Head. Previous use: nitric acid heat train.