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. 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. Pdf comparison of risk assessment using hazop and etba. It is a group process for identifying potential hazards and operability problems. Flowchart of hazop study 6 risk is a possibility that could be happened after the work done can cause a loss as a consequence. Pdf hazop study base layer of protection analysis at. Hazop method has some steps that begin with plant flow process analysis. Being a essential element of life, the requirment for food product is in incricing in indonesia.
Dynamic hazop case study in order to extend the use of the dynamic simulation, an additional simulation scenario was investigated. Reverse osmosis ro water is added to the batch mixer via centrifugal pump. Comparison of risk assessment using hazop and etba techniques. In the other word, risk is a compilation between likelihood value and consequence value. 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. A hazop study identifies hazards and operability problems. Pdf hazop study on oil refinery waste water treatment.
Hazop training answers download and online options available can be in the. Food can demans can be met only if supported by strong fertilizers industry. 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. A list of guide words is used to generate deviations from normal operation corresponding to all conceivable possibilities. Hazid check list and hazop study are used in this study to identify the various hazards and associated potential different hazardous scenarios. Pdf hazop study base layer of protection analysis at steam. This report presents the outcome of the study and is comprised of three parts.
The hazop took place over 4 days for each individual plant. C hazop study logistics logistical development of this refinery unit hazop included the following. In addition, hazop can be performed on a line in the flow sheet that includes valves and pumps. 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. The abhisam hazop elearning course includes real life hazop case study with real life hazop worksheets, that you can use in your own workplace. Hazard and operability study and risk management case study. 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. 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. Hazard and operability analysis hazop systematically identifying and documenting hazards and operability issues. 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. 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. All about hazard and operability study learn hazop get. Lopa is lies in between hazop and quantitative risk assessment qra in terms of rigorousness.
The resulting simulation model is used as the framework for a dynamic hazard and operability hazop study. 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. Take the necessary actions specified in the report step 12. A dynamic hazop case study using the texas city refinery. 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. Hazop study hazard identification and risk assessment.
Case study of a gasoline refinery unit in iran, authorsedigheh abbasi and. 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. Hazop study and process hazop preliminary is early stages of the process hazop study. Over the course of these 4 days the complete flow sheet was scrutinised for any possible process and.
Hazard and operability hazop study 1 hazard and operability hazop study. The team include three core team members and four parttime members. Hazop can be applied on units such as reactor, vessel or fractionator as a study node. Hazard and operability study process safety an overview. Case study of a gasoline refinery unit in iran, authorsedigheh abbasi and shakiba bakhtom and mansour ziaei and shirazeh. To achieve this purpose the current study is being conducted to determine. The hazop study would involve the following procedure. The car hits a deep hole and one of your tire blows. Hazop study carried out covered only steady state operation of the system.
It also covers hazop audits, which are seldom covered in a hazop book or a hazop pdf. 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. Host a closeout meeting and signoff on the hazop study. Generally, the worstcase result is the stated effect. 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 concept involves investigating how the plant might deviate from the design intent. Hazard and operability study and risk management case. Analysis of the potential hazard identification and risk assessment hira and hazard operability study hazop. Hazard and operability study in boiler system of the steam. Hazop hazid hazop study hazid safety studies hazard. A potential hazop study leader or hazop study chairperson must be aware of all of these. Apply basic pha to a case study discuss benefits and limits 31. Hazop study carried out covered only steady state operation of. This technique can be used for continuous or batch processes.
However, many people engineers, chemists, project managers, process operators. Use the risk matrix on page 20 in the textbook to determine risk assessment study resources. If, in the process of identifying problems during a hazop study, a solution becomes. 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. Pdf analysis of the potential hazard identification and. 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. Pdf hazop study on oil refinery waste water treatment plant. You and your family are on a road trip by using a car in the middle of the night. However, in the hazop study carried out, the focus was in the system, that has been installed inside of a container. Case study article pdf available january 2018 with 3,498 reads how we measure. Hazop study report template chemical engineering site.
Lopa vs hazop free download as powerpoint presentation. Hazop is a brainstorming exercise in which individuals from different disciplines participate. We also describe our use of hazop software to support the process. Hazop method is used to evaluate the process done in the plant, especiall those which dont sta in line with the operation design.
Pdf risk assessment hazard and operability study hazop. The range of process variable deviation d as defined. Hazop studies are conducted via the use of structured and systematic examinations based on guidewords. Flowchart of hazop study6 risk is a possibility that could be happened after the work done can cause a loss as a consequence. Risk analysis of a fuel storage terminal using hazop and fta. Hazop analysis shows that loading and unloading areas are the most sensitive areas of the plant and where the most signi. In this case study, we give an overview of the hazop methodology and discuss some facilitation challenges. Hazop method is a method to analyze and identify the potential harm in the process of the plant systematically. Hazop is short form for hazard and operability study. A hazop study is used to verify the integrity of design or procedures with respect to safety and operability.
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