Table A-2.

Automatically created extended HAZOP worksheet for the deviations ‘high pressure’ and ‘low pressure’

Pos.	Unit	Id.	Substance	Deviation	Super cause	Cause	Effect	Consequence	Safeguard
23	StorageTank-Unit	T-301	Hexane	High-Pressure	DepositionOf-Impurities	BlockedOutflow-Line	Crack	LossOfPrimaryContainment, Fire	CollectingBasin, PressureReliefValve
24	StorageTank-Unit	T-301	Hexane	High-Pressure	DepositionOf-Impurities	BlockedOutflow-Line	Crack	LossOfPrimaryContainment, FormationOfExAtmosphere, Explosion	CollectingBasin, DefineExProtectionZone, PressureReliefValve
25	StorageTank-Unit	T-301	Hexane	High-Pressure	DepositionOf-Impurities	BlockedOutflow-Line	Rupture	LossOfPrimaryContainment, Fire	CollectingBasin, PressureReliefValve, PressureVacuumReliefValve
26	StorageTank-Unit	T-301	Hexane	High-Pressure	DepositionOf-Impurities	BlockedOutflow-Line	Rupture	LossOfPrimaryContainment, FormationOfExAtmosphere, Explosion	CollectingBasin, PressureReliefValve DefineExProtectionZone, PressureVacuumReliefValve
27	StorageTank-Unit	T-301	Hexane	High-Pressure	AbnormalHotIntake, ExternalFire, SolarRadiation	ThermalExpansion	Rupture	LossOfPrimaryContainment, Fire	CollectingBasin, PressureReliefValve, PressureVacuumReliefValve
28	StorageTank-Unit	T-301	Hexane	High-Pressure	AbnormalHotIntake, ExternalFire, SolarRadiation	ThermalExpansion	Rupture	LossOfPrimaryContainment, FormationOfExAtmosphere, Explosion	CollectingBasin, PressureReliefValve DefineExProtectionZone, PressureVacuumReliefValve
29	StorageTank-Unit	T-301	Hexane	Low-Pressure	–	Ambient-Temperature-Change	CollapseOf-Enclosure	LossOfPrimaryContainment, Fire	CollectingBasin, PressureVacuumReliefValve, VacuumProofDesign
30	StorageTank-Unit	T-301	Hexane	Low-Pressure	–	Ambient-Temperature-Change	CollapseOf-Enclosure	LossOfPrimaryContainment, FormationOfExAtmosphere, Explosion	CollectingBasin, PressureVacuumReliefValve, VacuumProofDesign, DefineExProtectionZone
31	StorageTank-Unit	T-301	Hexane	Low-Pressure	FaultyInstallation, HumanError	Obstructed-VentPath	CollapseOf-Enclosure	LossOfPrimaryContainment, Fire	CollectingBasin, PressureVacuumReliefValve, VacuumProofDesign
32	StorageTank-Unit	T-301	Hexane	Low-Pressure	FaultyInstallation, HumanError	Obstructed-VentPath	CollapseOf-Enclosure	LossOfPrimaryContainment, FormationOfExAtmosphere, Explosion	CollectingBasin, DefineExProtectionZone, PressureVacuumReliefValve, VacuumProofDesign
33	StorageTank-Unit	T-301	Hexane	Low-Pressure	Malfunction-TransferPump	ExcessiveFluid-Withdrawal	CollapseOf-Enclosure	LossOfPrimaryContainment, Fire	CollectingBasin, PressureVacuumReliefValve, VacuumProofDesign
34	StorageTank-Unit	T-301	Hexane	Low-Pressure	Malfunction-TransferPump	ExcessiveFluid-Withdrawal	CollapseOf-Enclosure	LossOfPrimaryContainment, FormationOfExAtmosphere, Explosion	CollectingBasin, VacuumProofDesign DefineExProtectionZone, PressureVacuumReliefValve