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Hazop Study

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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.

Published in: Engineering

Hazop Study

  1. 1. HAZOP ? BY: IHSAN ALI WASSAN 14CHEMICAL ENGINEERING Quaid-e-Awam University of Engineering Science & Technology, Nawabshah, Sindh Pakistan 1
  2. 2. HAZOP ? -Definition? -Background? Where HAZOP is used ? Seven Steps of HAZOP study? Contents ? 2
  3. 3. A 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. 3
  4. 4. POINTS 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? 4
  5. 5. Can we make it more systematic? Parameter Guideword Possible Causes Consequences Action Safeguard Car speed Too fast Too slow Rushing Skidded when emergency brake - Slow down - Speed up -ABS brake system -Safety belt - Air bag Tire No thread Less thread Tire too old, often speeding and emergency break Car skidded - Check frequently - Have spare tire Window visibility Low Very low Rain Cannot see the road Car light Dim No light -Stop car -Go to nearest garage -Use emergency signal Road With holes Rocky Breaks the car tire - Put a signboard -Street lights Travel time Night Foggy No street light -Travel during daylight 5
  6. 6. HAZOP ?  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. 6
  7. 7.  The HAZOP technique was initially developed to analyze chemical process systems, but has later been extended to other types of system. BACKGROUND ? 7
  8. 8. HAZOP ? 8
  9. 9. RISK ? 9
  10. 10. HAZOP ? 10
  11. 11. • 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 ? 11
  12. 12. 7 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 safeguards 5. Look up your Risk Matrix to categorize the Risk. 6. Assess the Risk with Safeguards 7. Make a decision to accept the Risk or make a recommendation to further reduce the risk. 12
  13. 13. 7 steps of HAZOP ? 13
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  28. 28. Remember ? 28
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