Following is the worst thing I faced last month in one Solvent extraction plant.
There is one shell & tube heat exchanger (tubeside vegetable oil & shellside is steam @ 3 barg at operating condition). We hydrotested this vessel at 6 barg. This vessel is designed for 4 barg pressure both sides. For tubes to tubesheet joint, we done expansion of tubes which we do regularly. Tube material is SA249 TP304 ERW schedule 40, size: 1 1/2" OD (38mm). After 20 days of plant working, there is leakage from this tube to tubesheet joint. I am trying to figure out the reason why this happen.
Please note that there is no seal welding.
Reply With Quote
Bookmarks