Dear P’Paisarn,
For this time, scope and tie point of PRISM unit with our process is different with the previous as show in below detail;
1.Tie in PRISM unit with pig nozzle 2” on pig launcher (L-1030).
2.Tie in PRISM unit with 10”flange to pig launcher (L-1030)
3. Install temporary chick san pipe from PRISM unit at top flang 10” of christmas tree.
4.Tie in PRSIM unit with 2” nozzle of sump tank. --> This item already provided isolation procedure by you
The isolation procedure for tie in item 1-3, I attached in this email.
Please kindly review the new isolation procedure.
If you have any comment, please let me know.