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8/10/2019 HAZOP - Condensate Lines
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HAZOP RECORD FORMFacility/Project
Drawing No./Procedure
Subject
Condensate lines from the condensers to the
holding tank
DEVIATION CAUSE EFFECT SAFEGUARDS ACTION
No flow
High Flow
Pump malfunction
Closure of V 22 18
Closure of V 22 19
Closure of V 22 17
Overheating in E112
P125 failure would result in no coolingwater running through the heat
exchanger.
Closure of this valve would increase the
pressure of the condensate line exitingE113. This would also cause an
increased pressure in V147. This would
change the pressure gradient and force
the liquid onto the vacuum lines causingmixing in the system. There is potential
for vessel E113, V147 and V150 todamage and rupture.
This would also cause an increasedpressure in V148. This would change
the pressure gradient and force theliquid onto the vacuum lines causing
mixing in the system. V148 and V150
could damage and rupture.
The closure would cut off cooling watersupply to E113. This would result in no
condensate being formed in the shelland tube heat exchanger.
Due to overheating in E112 more than
the required/optimal amount of vapouris fed into E113 uncondensed. This
increases the flow rate of condensate in
Pressure transmitter and temperature
indicator placed on the inlet to the pump
Install a flow meter across
the value to ensure there isalways flow when the
system is under operation.
Install a flow meter acrossthe value to ensure there is
always flow when thesystem is under operation.
High temperature and
pressure alarms. Alsoensure good maintenance.
Date
Team Members
8/10/2019 HAZOP - Condensate Lines
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Less flow
CONSIDER REVERSE FLOW
High temperature
More cooling water supplied toE113.
Temperature of cooling water
less than estimated
Less cooling water to E113.
Temperature of cooling water
less than estimated
Leaks in pipeline
Ambient temperature rises.Either environmental such as a
heat wave or human error such
as using a fire torch or weldingmachine near the pipelines and
heat exchangers. Cooling
waters efficiency reduces.
the stream and resulting in a increase in
pressure and filing up V150 at a fatserrate then estimated. This would also put
increase pressure on V147.
More than optimal amount of vapourcondenses. This increases the flow rate
of condensate in the stream andresulting in a increase in pressure and
filing up V150 at a fatser rate then
estimated. This would also put increasepressure on V147
More than optimal amount of vapour
condenses. This increases the flow rate
of condensate in the stream and
resulting in a increase in pressure andfiling up V150 at a fatser rate thenestimated. This would also put increase
pressure on V147
This would result in less condensatebeing formed in the shell and tube heat
exchanger
This would result in less condensate
being formed in the shell and tube heatexchanger
N-heptane hazardous. It is flammable
and can cause skin irritation. This
causes a lot of potential risk if released.
N-heptane is flammable. And increasein the temperature can build up pressure
or act as a ignition source.
Pressure transmitter placed on the inlet tothe pump. Drain on V150.
Temperature indicator
Temperature indicators
High pressure alarms. Alsoensure good maintenance.
Flow meter with a highlevel alarm on V150
Temperature alarms
connected to the indicator.
Flow meter with a high
level alarm on V150
Educate people on the
hazards of n-heptane.
Ensure it is a no smokingzone and people wear
protective clothing. Installflow indicators between
very long pipelines.
Higher temperature alarms
attached with indicator.Educate staff on the
hazards of n-heptane.
Ensure it is a no smokingzone and people wear
protective clothing.
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Low Temperature
High Pressure
Low pressure
Desired product not achieved
Maintenance
Power
Check freezing point
Closure of V 22 18
Closure of V 22 19
Leaks in pipeline
Over condensation inE112
Excess cooling water
Closure of this valve would increase thepressure of the condensate line exiting
E113. This would also cause anincreased pressure in V147. This would
change the pressure gradient and force
the liquid onto the vacuum lines causingmixing in the system. There is potential
for vessel E113, V147 and V150 todamage and rupture.
This would also cause an increased
pressure in V148. This would changethe pressure gradient and force theliquid onto the vacuum lines causing
mixing in the system. V148 and V150
could damage and rupture.
N-heptane hazardous. It is flammable
and can cause skin irritation. Thiscauses a lot of potential risk if released.
Install a flow meter across
the value to ensure there is
always flow when thesystem is under operation.
Install a flow meter acrossthe value to ensure there is
always flow when the
system is under operation.
Educate people on thehazards of n-heptane.
Ensure it is a no smokingzone and people wear
protective clothing. Install
pressure indicatorsbetween very long
pipelines.
Recommended