CATALYST FLUSHING PROCEDURE THROUGH D1-1401 TO D1-1301 1- D1-1401 seal system to be lined up before flushing activity as per SOP.
2- Ensure isolation of RA source of D1-1301
3- Middle man way of D1-1301 to be opened and half-moon to be installed.
4- Install CG fitting on inspection port of D1-1401
5- Demin bobbin to D1-1401 vent to be installed for filling 6- Fill Demin water till 100 % of LT.
7- Start Pressurization of D1-1401 till 1.0 barg from Nitrogen fitting arrangement.
8- Now open PCV-2132 gradually and monitor D1-1301 overflow from middle manway.
9- Flush sample to be collected after start of overflowing and after 5 min from middle manway for MPR analysis.
10- Close PCV-2132 when level dropped to 60% on LT of D1-1401.
11- Monitor pressure simultaneously.
12- Repeat the above pressure 2times.
Note: As per calculation at 1 barg pressure overflowing will take 10 mins