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HAZOP & FMEA Analysis Guide

The document provides an overview of HAZards and OPerability (HAZOP) analysis, a qualitative technique used to identify hazards and operability problems in industrial processes. It discusses the key aspects of a HAZOP analysis, including using guide words to identify possible deviations from design intent, examining elements of a process flow sheet or Piping and Instrument Diagram, and documenting causes, consequences, existing safeguards, and recommendations. The document outlines the typical HAZOP study process of defining the purpose and scope, planning the study, breaking down the process into elements, and reporting findings.

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71 views5 pages

HAZOP & FMEA Analysis Guide

The document provides an overview of HAZards and OPerability (HAZOP) analysis, a qualitative technique used to identify hazards and operability problems in industrial processes. It discusses the key aspects of a HAZOP analysis, including using guide words to identify possible deviations from design intent, examining elements of a process flow sheet or Piping and Instrument Diagram, and documenting causes, consequences, existing safeguards, and recommendations. The document outlines the typical HAZOP study process of defining the purpose and scope, planning the study, breaking down the process into elements, and reporting findings.

Uploaded by

mool raj
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
You are on page 1/ 5

Selected Chapter 6 RA Techniques

Follow Hyperlinks and Arrows. Scroll down to


the "End" of the page
Covered in Chapter 6 Chapter 8 and Chapter 15
What if What-If/Check HAZOP 1 FMEA FTA ETA
List PHA HAZOP 2

Qualitative
Semi-Qantitative elemtns may be included Quantitative

Failure Mode Effects Analysis (FMEA) is


a preliminary qualitative technique that
may require semi-quantitative or
quantitative analysis

Only What-If, What-If/Checklist PHA and HAZOP are included in this file
HAZOP Hazards and Operability Analysis
HAZOP was developed by Lawley (1974) of ICI. Based on early publication by Elliott & Owen (1968).
HAZOP is a more involved qualitative method used to identify both hazards and operability problems using ‘guide
words’ to prompt team members in identifying deviations that can lead to the failures. Similar to a Failure Mode
and Effect Analysis (FMEA), HAZOP identifies failure modes of a process, their causes and resulting
consequences. However, rather than starting with failures, HAZOP uses guide words to identify deviations from
intended operations, and then traces back to the possible causes and failure modes. The basis for a HAZOP is a
critical examination of information found in a process flow sheet, a plant layout, equipment specification or a
Piping and Instrument Drawing (P&ID).
P&ID Reference
HAZOP Principles include: See tabs: Ex HAZOP 1 CL and Example
1 Guide Word Ex HAZOP 2
2 Element
3 Deviation
4 Causes
5 Consequences
5 Safeguards/Control Measures
6 Recommendations / Actions
Common HAZOP Analysis Process Parameters
Addition Pressure Frequency Flow
Composition Temperature Viscosity Mixing
Level Time Voltage Separation
pH Speed Toxicity Reaction
HAZOP requirements
Experienced
Defined facilitator Observation
design and
intent Interview
HAZOP
Review By Documentation Follow-up
Team

Multidiscip Available
linary Information
team Team HAZOP P&Ids,
Experience
Worksheet

Safeguards/ Recommend
Deviation Causes Consequences Controls ation/Action

Risk Factor
(Optional)
HAZOP Worksheet contents may vary.
Figure 6.7 HAZOP Study Process Steps
Gather
Define Breakdown
Define Purpose and Plan HAZOP documents,
Responsibilities Process into
Scope Study interviews,
Assembly Team Elements
observations

Identify Causes Examine


Identify Existing Define Design
and Elements to Formulate
and Needed Intent of
Consequences Identify Guide Words
Safeguards Elements
of Deviations Deviations

Report Findings

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