... side (Between the tube and shell):Nature water,ground water,sea water,and another corrosive solution.Material ... :1)Heat transfer Tube: Pure titanium seamless tube,Thickness 0.55mm2)Shell ... is strong and not leakage . 4)The shell is stainless steel 304 or 316L, So,it ... than 45 degree Celsius) ,Beside that,The shell was tested by 10 Bar water pressure to ...