Tube Bundle Heat Exchanger Producer: Heat Exchanger for Isothermal Furnace, OD 25 MM, Stainless Steel 304, SS 321, F=76 ㎡, F=125 ㎡ Heat Exchanger Area. Project: Heat exchanger tube Bundle for Cangzhou Zhengyuan Chemical Fertilizer Co.,Ltd. Dimension: φ25. Material: Stainless steel 304. Standard: SS 321. Heat exchanger area: F=76㎡, F=125㎡. website: https://www.dfctank.com/tube-bundle-heat-exchanger-for-isothermal-furnace.html