Unused approx 1020 sq ft TP304L Stainless Steel vertical shell and tube heat exchanger. Manufactured by Wuxi Zhicheng Biochemical Engineering Equipment Co., Ltd. (634) 19.05mm OD x 2500mm L tubes rated 87PSI/FV@220C. SA240 Shell MAWP 175PSI/FV @220C. Lug mounted. Serial #WZA21-27. National Board #154. Built 2021.