The concept involves investigating how the plant might deviate from the design intent. Case study of a gasoline refinery unit in iran, authorsedigheh abbasi and. Hazop study report template chemical engineering site. The hazop took place over 4 days for each individual plant. You and your family are on a road trip by using a car in the middle of the night. Being a essential element of life, the requirment for food product is in incricing in indonesia. The hazop study would involve the following procedure. In addition, hazop can be performed on a line in the flow sheet that includes valves and pumps. If, in the process of identifying problems during a hazop study, a solution becomes.
It also covers hazop audits, which are seldom covered in a hazop book or a hazop pdf. The resulting simulation model is used as the framework for a dynamic hazard and operability hazop study. Hazop is defining hazards key words, consequences, causes and actions to be done to prevent an assumed hazardous scenario. In this form the system will be tested later in the project e.
It has been established that the simulation approach employed in this study is a tank model that replicates the dynamic filling of the raffinate splitter like it happened on the day of the incident. Dynamic hazop case study in order to extend the use of the dynamic simulation, an additional simulation scenario was investigated. All about hazard and operability study learn hazop get. Here is an example of how a hazop study can be used by an expert team to assess the procedure involved in chemical production.
Hazard and operability hazop study 1 hazard and operability hazop study. Analysis of the potential hazard identification and risk assessment hira and hazard operability study hazop. But i have been able to find following websites on internet which will be useful to you for information about it. Hazop can be applied on units such as reactor, vessel or fractionator as a study node. Flowchart of hazop study6 risk is a possibility that could be happened after the work done can cause a loss as a consequence. Generally, the worstcase result is the stated effect. We also describe our use of hazop software to support the process. Lopa is lies in between hazop and quantitative risk assessment qra in terms of rigorousness. Take the necessary actions specified in the report step 12. Use the risk matrix on page 20 in the textbook to determine risk assessment study resources. Hazop is short form for hazard and operability study.
Hazop studies are conducted via the use of structured and systematic examinations based on guidewords. Host a closeout meeting and signoff on the hazop study. The hazard and operability hazop study is a widely used formal technique for examining potential safety and. Pdf comparison of risk assessment using hazop and etba. The abhisam hazop elearning course includes real life hazop case study with real life hazop worksheets, that you can use in your own workplace. Pdf hazop study base layer of protection analysis at steam. Conduct the hazop study and document the results step 10.
Pdf hazop study on oil refinery waste water treatment. Comparison of risk assessment using hazop and etba techniques. Using the hazop principles mentioned earlier, list of temperature, pressure, flow and composition deviations for every stream was created and investigated. The fundamental requirement for modelbased hazop study is the value of the deviation. Flowchart of hazop study 6 risk is a possibility that could be happened after the work done can cause a loss as a consequence. Hazard and operability study process safety an overview. This report presents the outcome of the study and is comprised of three parts. Case study summary demonstrating my skills, knowledge, and responsibility for a significant element of the safety lifecycle in accord with the relevant areas of 615086151162061. Risk analysis of a fuel storage terminal using hazop and fta.
Hazop training answers download and online options available can be in the. Hazop method is a method to analyze and identify the potential harm in the process of the plant systematically. Furthermore, a case can be made for having more than one person on the team from the same discipline to reflect different types of work, levels of experience, ways of performing jobs, attitudes, and behaviors which can have a major impact on the results of a hazop study. Hazop hazid hazop study hazid safety studies hazard. Hazard and operability study in boiler system of the steam. A list of guide words is used to generate deviations from normal operation corresponding to all conceivable possibilities. Hazop method has some steps that begin with plant flow process analysis. A hazard and operability hazop study is a qualitative technique used to identify hazards in a planned or existing process so that their associated risks to personnel or equipment can be evaluated and prevented. If, in the process of identifying problems during a hazop study, a solution becomes apparent, it is recorded as part of the hazop result. The hazard and operability hazop study is the most widely used process hazards analysis pha technique in the chemical, pharmaceutical, food, oil and gas, nuclear, and other process industries worldwide. However, in the hazop study carried out, the focus was in the system, that has been installed inside of a container. Hazop study carried out covered only steady state operation of. Establishing the design intent for the process, including the desired andor safe ranges for each of the operating parameters applying the guide words no, less, more, reverse, etc. In the other word, risk is a compilation between likelihood value and consequence value.
However, many people engineers, chemists, project managers, process operators. Pdf analysis of the potential hazard identification and. In this case study, we give an overview of the hazop methodology and discuss some facilitation challenges. Case study of a gasoline refinery unit in iran, authorsedigheh abbasi and shakiba bakhtom and mansour ziaei and shirazeh. Hazard and operability study and risk management case study. The main purpose of this work is to study the oily waste water from one of the biggest refinery located in karachi, pakistan by applying hazard and operability study hazop on it in hypothetical. This study provides a dynamic model of the sequence of events leading up to the incident and replicates the reported process variables during the isomerisation unit startup on the day of the incident. A potential hazop study leader or hazop study chairperson must be aware of all of these. Hazop analysis shows that loading and unloading areas are the most sensitive areas of the plant and where the most signi. C hazop study logistics logistical development of this refinery unit hazop included the following. To produce a batch of 10% concentration hcl hydrochloric acid steps. The car hits a deep hole and one of your tire blows.
Lopa vs hazop free download as powerpoint presentation. Cooling water 51 hazop on heat exchanger answer 1 guide word less deviation less flow of cooling water causes pipe blockage consequences temperature of process fluid remains constant action high temperature alarm. Safetec is a leading provider of hazid and hazop, conducting over 70 analyses every year for numerous clients. Hazop method is used to evaluate the process done in the plant, especiall those which dont sta in line with the operation design. It is a group process for identifying potential hazards and operability problems. This technique can be used for continuous or batch processes. Hazop study and process hazop preliminary is early stages of the process hazop study. Pdf hazop study base layer of protection analysis at. The case study reported here is part of a collaborative project between the centre for software engineering limited, cambridge consultants limited and the human genetics unit of the medical research council. Reverse osmosis ro water is added to the batch mixer via centrifugal pump.
Process safety applications august 2006 my case study example is a project i worked on in 2005 where i was the process safety engineer responsible for coordinating. To achieve this purpose the current study is being conducted to determine. Pdf risk assessment hazard and operability study hazop. A hazop study identifies hazards and operability problems. Case study article pdf available january 2018 with 3,498 reads how we measure. You were replying a text message while driving at 100 kmh and it was raining heavily. Apply basic pha to a case study discuss benefits and limits 31. Over the course of these 4 days the complete flow sheet was scrutinised for any possible process and. A dynamic hazop case study using the texas city refinery. The hazid hazard identification study is used for early identification of hazards and is applied as soon as process flow diagrams, mass and energy balance and draft layouts are available. Hazop study hazard and operability study is a well known hazard analysis tool used for process safety management and hse risk assessment of plans and facilities. Hazop study hazard identification and risk assessment.
Hazid check list and hazop study are used in this study to identify the various hazards and associated potential different hazardous scenarios. This course is the culmination of over 25 years of teaching and employing the hazop study methodology in a variety of process industries, by the lead contract author of ccps guidelines for hazard evaluation procedures, third edition and the instructor of the course ccps hazop studies and other pha techniques for process safety and risk. Pdf hazop study on oil refinery waste water treatment plant. Hazard and operability analysis hazop systematically identifying and documenting hazards and operability issues. The range of process variable deviation d as defined. Hazard and operability study and risk management case. A hazop study is used to verify the integrity of design or procedures with respect to safety and operability. Hazop is a brainstorming exercise in which individuals from different disciplines participate. Hazop study carried out covered only steady state operation of the system. A hazop analysis of an lng ships cargo handling system design jbfa performed a hazop analysis of the proposed design of cargo handling systems for an lng liquefied natural gas ship.
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