Unused approx 1100 sq ft TP304L Stainless Steel vertical shell and tube heat exchanger. Manufactured by Wuxi Zhicheng Biochemical Engineering Equipment Co., Ltd. (569) 19mm OD x 3000mm L tubes rated 87PSI/FV@220C. SA240 Shell MAWP 175PSI/FV @220C. Lug mounted. Serial #WZA21-26. National Board #157. Built 2021