Used 93 sq.ft. horizontal shell & tube heat exchanger, Mfg. by Alabama Heat Exchangers Inc., Type BEM. 316L stainless steel shell rated for 75 psi & FV @ -58/572 Deg. F. 316L stainless steel tubes rated for 125 psi & FV @ -58/572 Deg. F. Shell diameter 3/4'' dia x 10' long. Serial #AHE691, National Board # 372, Year Built: 2001, Previous Service: Product Cooler Condenser - Grignard