Transcript
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HAZOP ?
BY: IHSAN ALI WASSAN 14CHEMICAL ENGINEERING
Quaid-e-Awam University of Engineering Science & Technology, Nawabshah, Sindh Pakistan
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HAZOP ?-Definition?-Background?
Where HAZOP is used ? Seven Steps of HAZOP study?
Contents ?
3A SCENARIO….
You and your family are on a road trip by using a car in the middle of the night. You were replying a text message while driving at 100 km/h and it was raining heavily. The car hits a deep hole and one of your tire blows. You hit the brake, but due to slippery road and your car tire thread was thin, the car skidded and was thrown off the road.
4POINTS TO PONDER
What is the cause of the accident?
What is the consequence of the event?
What can we do to prevent all those things to happen in the first place?
What other possible accidents might happen on the road trip?
Can we be prepared before the accident occurs?
5Can we make it more systematic?Parameter Guideword Possible
CausesConsequences Action Safeguard
Car speed Too fastToo slow
Rushing Skidded when emergency brake
- Slow down- Speed up
-ABS brake system-Safety belt- Air bag
Tire No threadLess thread
Tire too old, often speeding and emergency break
Car skidded - Check frequently- Have spare tire
Window visibility
LowVery low
Rain Cannot see the road
Car light DimNo light
-Stop car-Go to nearest garage-Use emergency signal
Road With holesRocky
Breaks the car tire - Put a signboard-Street lights
Travel time NightFoggy
No street light -Travel during daylight
6HAZOP ?
A Hazard and Operability (HAZOP) study is a structured and systematic examination of a planned or existing process or operation in order to identify and evaluate problems that may represent risks to personnel or equipment, or prevent efficient operation.
A HAZOP is a qualitative technique based on guide-words and is carried out by a HAZOP team during a set of meetings.
A HAZOP is a process to identify and Access risks.
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The HAZOP technique was initially developed to analyze chemical process systems, but has later been extended to other types of system.
BACKGROUND ?
8HAZOP ?
9RISK ?
10HAZOP ?
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• HAZOP technique is used by most major companies handling and processing hazardous material,- oil and gas production- flammable and toxic chemicals- pharmaceuticals etc
Where HAZOP is used ?
127 steps of HAZOP ?
Let’s break down a HAZOP into 7 steps:1. Identify the Risk by asking what can cause a hazardous event.2. Describe the consequence and assign a severity level.3. Assess the probability of the cause.4. Evaluate the Risk based on the severity and probability without any
safeguards5. Look up your Risk Matrix to categorize the Risk.6. Assess the Risk with Safeguards7. Make a decision to accept the Risk or make a recommendation to further
reduce the risk.
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28Remember ?
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