Get current pricing for Carbone, Carbone 469 SQ. FT B 469 Sq. Ft. Vertical Graphite Cylindrical Block Heat Exchanger. Mfg. By Carbone, Type Pbc18dl-7pu-1-1, Sr# 111125. Built 1997. Asme Code Stamped For 1 . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: