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Process Hazard Analysis Techniques: What-if, FMEA, and HAZOP, Lecture notes of Workplace Safety

Concordia UniversityWorkplace Safety

hazard and risk identification

Typology: Lecture notes

2021/2022

Uploaded on 05/08/2023

usman-ansar
usman-ansar 🇨🇦

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1. Collect and review information about the facility
2. Divide the facility into process sections
3. Select a question and identify:
•Hazards
•Consequences
•Severity
•Likelihood
•Recommendations
4. Repeat Steps 4 –6until process is complete
Screening Level ChecklistWhat-if
Overview of the procedure
FMEA HAZOP
Ge
tting Hazards Hazards from Risk Hazard & Risk Final
S
tarted Identification Human Error Analysis –Case Studies Thoughts
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Partial preview of the text

Download Process Hazard Analysis Techniques: What-if, FMEA, and HAZOP and more Lecture notes Workplace Safety in PDF only on Docsity!

1. Collect and review information about the facility

2. Divide the facility into process sections

3. Select a question and identify:

• Hazards

• Consequences

• Severity

• Likelihood

• Recommendations

4. Repeat Steps 4 – 6 until process is complete

Screening Level Checklist What-if

Overview of the procedure

FMEA HAZOP

Started Identification Human Error Analysis – Case Studies Thoughts

Here is an example of what-if questions for a plant:

Screening Level Checklist What-if FMEA HAZOP Started Identification Human Error Analysis – Case Studies Thoughts Area What-if Hazard and Consequence Previously Addressed Safeguard Recommendations? Chemical 1 Connects to the wrong line when loading off truck? 1)Released into the air - an explosion is possible 2)Gets wet - bacteria will grow and become useless. No 1)Lines are sized differently

  1. Labelled 3)Colour coded 4)Use a reliable vendor 1)Vacuum system to remove dust
  2. Perform a moisture test Truck’s ignition is on while unloading? Exhaust fumes – adverse health effects No None 1)Turn engine off 2)Local ventilation system The dust collector fails? Dust accumulation
  • adverse health effects No None 1 ) Place an alarm with lights and horns in the truck unloading area.

• Lists ways equipment can fail and the effect on the system.

• Bottom-up analysis

• Uses a spreadsheet to detail each hazard, cause, frequency,

consequence and proposed safeguard

Screening Level Checklist What-if

Failure Modes and Effect Analysis

FMEA HAZOP

Started Identification Human Error Analysis – Case Studies Thoughts

  • Assess component failures and the hazards caused
  • Develop recommendations for better equipment reliability

Requirements

  • Process descriptions, drawings and operating procedure

Analysis Procedure

  • Go through the system process, starting with the introduction of the feed

until the end of the process

  • Complete the FMEA table

Results

  • Recommendations on safeguards to avoid hazards associated with

equipment failures

Screening Level Checklist What-if

Failure Modes and Effect Analysis

Purpose

FMEA HAZOP

Started Identification Human Error Analysis – Case Studies Thoughts

Chemical A Chemical B Reactor Started Identification Human Error Analysis – Case Studies Thoughts PT PT

What are some

point of failures

in this chemical

system?

Screening Level Storage Tank Checklist What-if FMEA HAZOP

Chemical A Chemical B Reactor PT PT What are the hazardous events that would arise if this valve failed?

What are some

point of failures

in this chemical

system?

Screening Level Storage Tank Checklist What-if FMEA HAZOP Started Identification Human Error Analysis – Case Studies Thoughts

  • Very structured process hazard analysis technique that is reliable for evaluating systems
  • Easy to learn and apply the technique
  • Can be time-consuming and expensive as the technique doesn’t directly identify process sections where multiple faults could occur
  • The technique may not identify areas of human error in process sections
  • Procedural review is not easy Screening Level Checklist What-if FMEA HAZOP Started Identification Human Error Analysis – Case Studies Thoughts