What are HAZOP guide words?
What are HAZOP guide words?
HAZOP guide words are key supporting elements in the execution of a HAZOP. analysis. According to IEC Standard 61882: The identification of deviations from the design intent is achieved by a. questioning process using predetermined “guide words”.
How many guide words are there in Hazop study?
For a medium-sized chemical plant where the total number of items to be considered is 1200 (items of equipment and pipes or other transfers between them) about 40 such meetings would be needed….Guide words and parameters.
| Guide Word | Meaning |
|---|---|
| BEFORE | Relating to order or sequence |
| AFTER | Relating to order or sequence |
What standard is used as a guide for HAZOP?
Hazard and operability studies (HAZOP studies). Application guide
| Standard Number | BS EN 61882:2016 |
|---|---|
| Committee | DS/1 |
| ISBN | 978 0 580 87354 6 |
| Publisher | BSI |
| Format | A4 |
What is the importance of guide words in HAZOP analysis?
The guide words are used to ensure that the design is explored in every conceivable way. Thus the team must identify a fairly large number of deviations, each of which must then be considered so that their potential causes and consequences can be identified.
How are the guide words used in HAZOP?
A list of guide words is used to generate deviations from normal operation corresponding to all conceivable possibilities. Guide words covering every parameter relevant to the system under review:i.e. flow rate and quality, pressure, temperature, viscosity,components etc.Flow chart for application of HAZOP is shown in figure. Normal operation.
What does HAZOP stand for in Hazard and operability?
HAZOP – Hazard and operability NODE: Pipe after pump and splitter PARAMETER*: Flow rate GUIDE WORD*: Less (less than normal value) •DEVIATION: less flow than normal •CAUSE: of deviation, can be more than one •CONSEQUENCE: of the deviation/cause
What are the parameters of a HAZOP analysis?
Some common parameters that are looked at include flow, pressure, temperature, level, time, reaction, start-up, shutdown, draining, maintenance, etc. In fact, utilizing guide words is one of HAZOP’s defining features since they aim to pick apart every single process and the potential outcomes if something goes wrong.
What are the four phases of the HAZOP initiative?
Utilizing guide words is an important step within the four phases of a HAZOP initiative for risk management. They are used to describe almost any type of parameter in a process or procedure. Some common parameters that are looked at include flow, pressure, temperature, level, time, reaction, start-up, shutdown, draining, maintenance, etc.