We are offering double tubesheet heat exchanger.Total qty.: 16 nos. (exotic materials)shell & dish: sa 240 tp. 304l sa 516 gr. 70tube: sb 622 n10276, sb 163 n06600, sb 163 n08800, sb 165 n04400, sa 789 s32750 & sa 312 tp. 304flange: sa 266 gr. 2, sa 336 f 304l & sa 350 lf 2tube sheet: (sa266gr.2+sb575 10276), (sa266gr.2+sb 168 n0660), (sa266gr.2+sb409 n08800), (sa266gr.2+sb127 n04400), (sa 350 lf2+sa240 s032750) & (sa266gr.2+sa240 s032750).Third party inspection: ibic engineering, lloyd's register asia & ibr