Subject: RE: 2262E-2000-HQBJ-LYB-EML-0132 D720 and D722 shall be designed with a remote operated isolation valve Gentlefolk, it is on the bottom line that is normally used to discharge the coalesced water, but may release propylene in case a flange leaks.Therefore we need a positive isolation valve. Also, please note that since the hold-up of the two coalescers is indeed above 2 t, also Paragraph Gen. 10.50 of our HSE Design criteria applies – we will need emergency depressurization valves for both. I will issue a revision including for both issues asap.