Plant in fjord

HAZOP Manager

Version 7.0



Mike Lihou - Lihou Technical & Software Services

Click on the INTRODUCTION link to read from the beginning, or on an index entry to go directly to that section.


INTRODUCTION General concept, usage and terminology
Potential Hazard AND Operability Problems Improved Operability - an important benefit of Hazop Studies
Deviation from design intent Explanation of basic Hazop Study terminology
Industries in which the technique is employed The origin of the technique, and some of the industries in which Hazops are employed
The reasons for such widespread use of Hazops How the Hazop technique complements and extends existing design practices
THE BASIC CONCEPT Systematic analysis that encourages use of imagination
Keywords A unique and essential aspect of the Hazop Study methodology
Primary Keywords What they represent - Examples of process and operationally oriented keywords
Secondary Keywords Used in combination with Primary Keywords - Examples - Meanings - Relevance
HAZOP STUDY METHODOLOGY Information recorded - The Hazop Review Procedure - Recording Styles
Information to be Recorded Layout of a typical Hazop Study recording sheet
Deviation Essentially, the combination of Keywords
Cause Example of a Cause
Consequence Important aspects to bear in mind when assessing and recording the Consequence
Safeguards What to consider when identifying Safeguards
Action Types of Actions - Important points to take into account when formulating an Action
The Hazop Procedure Flow Diagram illustrating the systematic and iterative Hazop Study process
Full Recording versus Recording by Exception Describes two styles of recording Hazop information
THE HAZOP TEAM Ideal number of members - Composition of the study team
PREPARATORY WORK The importance of preparation
Assemble the data Typical documentation required for a Hazop Study
Understand the subject An essential aspect, the foundation upon which successful preparation is based
Subdivide the plant and plan the sequence Guidelines for Noding and planning the order of study
Mark the drawings Colour-coding of Nodes
Devise a list of appropriate Keywords Building a comprehensive but concise Hazop keyword list
Prepare Node Headings and Agenda Information to include in Node Headings, and the importance of an Agenda
Prepare a timetable Guidelines for planning a timetable, and its importance during lengthy Hazop Studies
Select the team Core and part-time Hazop Study team members
RUNNING A HAZOP STUDY Guidelines for leading an efficient, comprehensive and successful Hazop Study
THE REPORT The importance of the Hazop Study Report - Information and documentation to be included
THE ACTION FILE AND REVIEW MEETINGS Maintaining an Action File throughout the Review process