CEP ISOLATION / NORMALIZATION PROCEDURE

CEP ISOLATION PROCEDURE

  • If CEP is in stopped condition , remove from stand by mode .Close discharge valve & its IBV
  • If CEP is running , stop it .Close discharge valve & its IBV
  • Ensure Electrical isolation: CEP Motor, Discharge MOV including IBV
  • Ensure its discharge MOV & its IBV are in closed condition.
  • Close pneumatic Re-circulation control valve & its manual isolating valve.
  • Ensure Suction line Relief manual valve is in open condition
  • Close manual suction valve
  • Close discharge vent manual valve & its solenoid valve
  • Close both source of seal water manual valve. Ensure seal water pressure gauge is showing zero & observe vacuum
  • Close Canister vent manual valve
  • Close ECW cooling inlet and outlet valve to CEP thrust bearing oil cooler jacket if required
  • Open Suction strainer vent valve & Ensure no air is sucking from it. If air is sucking ,close this vent & tighten the valve (mention in S.no. 5 ,7, 8 & 10 )
  • Issue the permit
CEP NORMALISATION PROCEDURE
  • Ensure drain & vent of suction strainer are in closed condition
  • Open ECW cooling inlet and outlet valve to CEP thrust bearing oil cooler jacket.
  • Ensure Suction line Relief manual valve is in open condition.
  • Open Canister vent manual valve & Observe vacuum.
  • Open seal water valve going to CEP mechanical seal &
  • Note down Pressure in LIR Panel.
  • Open suction manual valve
  • Open recirculation isolation manual valve. Pneumatic recirculation control valve operation to be checked before starting the CEP. Keep control valve in full open condition.
  • Open Discharge vent manual valve & open its solenoid valve
  • Restore supply of CEP & its discharge MOV including IBV.
  • Release EPB & Start CEP for trial run

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