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HAZOP (Hazard and Operability) : To Maintain Safe Working After The Following

HAZOP (Hazard and Operability) is a formal systematic process to identify hazards and risks in a system by examining how equipment and processes might malfunction or be misoperated. The objective is to assess hazards from maloperations or malfunctions and their effects on the facility. HAZOP studies are required to evaluate engineered controls, operating procedures, and all operational modes to identify hazards over the life of the plant, including when modifications are made. Standards like the OISD and M.B. Lal Committee recommend performing HAZOP studies for large installations to maintain safety and implement recommendations.

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38 views2 pages

HAZOP (Hazard and Operability) : To Maintain Safe Working After The Following

HAZOP (Hazard and Operability) is a formal systematic process to identify hazards and risks in a system by examining how equipment and processes might malfunction or be misoperated. The objective is to assess hazards from maloperations or malfunctions and their effects on the facility. HAZOP studies are required to evaluate engineered controls, operating procedures, and all operational modes to identify hazards over the life of the plant, including when modifications are made. Standards like the OISD and M.B. Lal Committee recommend performing HAZOP studies for large installations to maintain safety and implement recommendations.

Uploaded by

Nishanth
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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HAZOP (Hazard and Operability)

DEFINITION
 Hazards and Operability- is defined as: “The application of a formal systematic critical examination of the process and
engineering intentions of the new facilities, to assess the hazard potential of mal-operation or malfunction of
individual items of equipment and the consequent effects on the facility as a whole”.

OBJECTIVE
 HAZOP is to assess the hazard potential of mal-operation or malfunction of equipment and the consequent effects on
the facility.
 It attempts to identify how a process may deviate from the design intent.

WHY IT’S REQUIRED


 HAZOP study Assesses engineered controls (ex: automation), sequences of operations, procedural controls (ex:
human interactions) etc.
 Review different operational mode with respect to start up, shut down, emergency etc.
 Identify hazards during the operation life of the plant with respect to Modifications, change on operation window,
critical control loops, change in composition etc.

FOLLOWING STANDARDS

 OISD COMMITEE RECOMMENDATION


To maintain safe working after the following

 Major modifications and changes in facilities.


 Experience from accidents, analysis of causes.
 Organizational changes.
 Changed regulatory requirements.
 Carrying Out Changes of Logic of Interlocks Set Point and Process Conditions.
 To identify potential hazards in the plant.

 M.B. LAL COMMITTEE RECOMMENDATION


Section 10.4. states the following
 Carry out HAZOP and Quantitative Risk Assessment (QRA) on large sized installations through well qualified agency
and implement recommendations forthwith.
 HAZOP study Assesses engineered controls (ex: automation), sequences of operations, procedural controls (ex:
human interactions) etc.
 Review different operational mode with respect to start up, shut down, emergency etc.
 Identify hazards during the operation life of the plant with respect to Modifications, change on operation window,
critical control loops, change in composition etc.
 Case study to highlight the importance of HAZOP.

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