Stop feeding antistatic agent to R 401.Depressurize the system to 0.3 MPag towards F 340 keeping the steam open to E 433.Stop C 401 and depressurize to 0.1 MPag the system R 401 plus T 430.The residual hold up of propylene can be bled to flare via PRCA 4002Shut off instrument purges and chromatographic sample lines.Shut off steam to E 433.