Unused 8164 sq ft shell and tube heat exchanger. Manufactured by SteelTek. Type BKM. Size 38/54-396. (1548) .625" OD SA-214 Tubes rated 1200 PSIG@200F. SA-516 Shell rated 300PSIG@200F. (2) Saddle mounted. 41'OAL x 55.25"OD x 4'6"OAH. National Board #2438. Serial #12S-2783. Built 2012. 50000lb. Designed as Second Gas Chiller.