Its purpose is to reduce risk and ensure the safety of workers in plant environments. A simple example of a hazop figure 1 refuelling at sea 1. It is primarily used to study complex operational hazards and functions in chemical processing plants but is also used in nuclear. Standard worked example in order to illustrate some of the ideas and methods that are discussed in this book, a simple worked, fictional example is provided in this section, and will be referred to at appropriate points in succeeding chapters. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Hazard identification procedures example 1 identification of workplace hazards will be accomplished through a cooperative effort between management, supervisors, employees and safety consultants. As the basic nature of the system is to process its input substances, i. In the current industrial revolution, several manufacturing companies are coming up with the aim of satisfying the market. For example, many older plants are upgrading their control and instrumentation systems.
A simple sketch describing part of the system is shown in figure 2. The starting point for a hazop study is the deviation from the design intent. Hazop study is carried out during the design stage of the process plant or during carrying out any modification in the existing plant. For example, more reaction could mean either that a reaction takes place at a faster rate, or that a. Nov 02, 2016 hazop study stands for hazard and operability study. Hazop study deals with the identification of hazards due to process parameter deviations. In this paper, the methodology used is based on the combination of hazop analysis and a quantitative analysis of the most relevant hazards by fta. Hazop study practitioners must avoid omitting scenarios that may not be identified by focusing on individual nodes. Hazard and operability analysis hazop is a structured and systematic technique for. Use bow tie tool for easy hazard identification presented at 14 th asia pacific confederation of chemical engineering congress singapore, 2124 february 2012 syed zaiful hamzah principal risk consultant abs consulting singapore. Fmea example step by step example of how to complete an fmea. If, in the process of identifying problems during a hazop study, a solution becomes.
Risk analysis of a fuel storage terminal using hazop and fta. This technique can be used for continuous or batch processes andread more. In this example we shall apply the hazop technique to the equipment shown. Basically, it is used to identify potential hazard or problems that may occur and bring risk to personnel, equipment or lead to nonconforming products pqri. A previously mentioned, the hazop team is a multidisciplinary team.
What if check lists hazop fmea fta cpqra quantitative quantitative fmea, failure mode effects analysis is a preliminary qualitative technique that may require preliminary quantitative analysis miniqra. A hazard and operability study hazop is a structured and systematic examination of a complex planned or existing process or operation in order to identify and evaluate problems that may represent risks to personnel or equipment. Figure 12 shows liquid flowing into an atmospheric tank, t100. Norhayati, petroliam nasional berhad 4397000, 01 october 2003, uncontrolled copy, c bsi. Hazop an abbreviated term of hazards and operability is defined as. Hazop template excel is costs nothing, crossplatform, adaptable, easy to use, and flexible. Harm is the consequence of a hazard occurring and may take many forms. Figure 1 is an example of a generic fmea worksheet, truncated after the recommended actions column. Download fmea examples, fmea templates excel, pfmea. Note that this is a screen shot only and the actual hazop example will be live simulation type with buttons that generate deviations for the pharma cip clean in place process shown here.
A hazard and operability analysis hazop is a risk management technique used to identify potential hazards and functional flaws in existing or planned plant systems. For example, multiple failure scenarios may involve causes originating from more than one node or system. As a result, the very first publication considering the hazop study appeared in the same year, and finally the chemical industries association published a first hazop guide in 1977. Hazop studies are conducted via the use of structured and systematic examinations based on guidewords. Hazard operability study and risk assessment example. To achieve full benefits from a hazop study, it has to be properly documented and followed up. A hazard and operability hazop study is a systematic brain storming process of assessing the existence of hazards in equipment and vulnerability of its operation. Although the basic hazop analysis approach is well established, the way that it is employed may. Hazop example for example a hazop node may be a day tank that pumps a reactant to the plant every day. The design intent is transfer liquid from tank to plant possible deviations from intent are evaluated using guide words such as less than, more than, reverse, no and others. Hazop is a qualitative technique that carries out a structured analysis of the process and allows identifying the deviations that may take. However, sometimes things fail to work as anticipated.
You and your family are on a road trip by using a car in the middle of the night. It can come into various forms such as a simple document, spreadsheet, or a database system where you will be able. A hazop study identifies hazards and operability problems. Leak typically was a cause for example for a deviation low flow or no flow. The guide words shown in table 1 are the ones most often used in a hazop. A multidisciplinary team or a hazop team carries out a. These sample online hazop template excel will display that. Hazop does not appear to fit into this simple model. Sample safety management system risk matrix page 3 severity of occurrences aviation industry definition meaning value catastrophic equipment destroyed multiple deaths systemwide shutdown and negative revenue impact. This deliverable reports the hazard and operability study hazop of the. It is simple to implement and easy for most hazop participants to understand.
For instance, a company may end up designing poor products. The process has been useful in securing safer plants at safer locations, in optimising. According to wikipedia 2015, hazard and operability or also known as hazop is a structured and systematic examination used to evaluate and examine system as well as the risk management. Hazop, or a hazard and operability study, is a systematic way to identify possible hazards in a work process. Polytechnic now teesside university, included simple hazop procedure to support and possibly determine failures that led to the flixborough incident.
Hazard and operability study process safety hazop can be defined as the application of a formal systematic examination of the hazard potential from deviations in designed operations and the consequential effects on the facilities. Fuel oil is transferred from a tanker to a ship as shown in figure 1. A hazard and operability study or hazop is a systematic, critical examination by a team of the engineering and operating intentions of a process to assess the hazard potential of maloperation or malfunction of individual items of equipment and the consequential effects on the facility as a whole. The following is an example of creating deviations using guide words and. Figure 12 shows liquid flowing into an atmospheric tank, t.
The concept involves investigating how the plant might deviate from the design intent. The primary strength of hazop is that it presents a systematic, disciplined and documented approach. Case study all about hazard and operability study learn hazop. Guide words these are simple words which are used to qualify or quantify the.
The output from a hazop is a clear understanding of the hazards and operability issues around a design. Jul 03, 2009 hazop leader the leader should be independent i. It is also easy to learn hazop analysis by understanding initially simple industrial process operations and what can go wrong in them. Download hazop template and example hazop study report. Hazop terminology system a system is a specific location or logical part of the process or operation in which possible deviations from the design intent are to be evaluated.
Simple programmers interface option to automatically display pdfs after creation custom resizing of pdf output configurable font embedding support for citrixterminal server support for windows 2003 server easy ps to pdf processing specify pdf document properties control pdf opening mode can be configured to add functionality to acrobat distiller. Are you planning to create a haccp hazard analysis. Normally applied to a new process or design, it questions the design intent by applying simple guidewords e. It is impossible to have the same effect on your brain while reading an old hazop book or a dry hazop pdf.
The following example shows how different hazop guide words might be used to brainstorm deviations around detergent control for a cleaning operation. Item criticality matrix xls, 14kb this is an example of an item criticality matrix for our simple flashlight fmea example. These are shown as animations, which makes them super easy to understand. Hazop is based on the use of guidewords, which question how the design intention might not be achieved at each part 2 of the system. Thus, the members of the team will vary from study to study with regards to their areas of. Hazop study report template chemical engineering site. Guide words these are simple words which are used to qualify or quantify the intention in order to guide and stimulate the brainstorming process and so discover deviations. Upon completion of a risk management plan, it is important that you create a tool you can use to record identified risks, their severity, and the actions or steps needed to be taken. Qi macros fmea excel template makes this process even easier.
The study facilitator leader usually prepares the node list for a process prior to commencement of a study. If so, we recommend you to browse through our downloadable and printable examples of haccp hazard analysis documents in pdf. It can come into various forms such as a simple document, spreadsheet, or a database system where you will be able to list down what has been mentioned before. Definition what does hazard and operability study hazop mean. The application of a formal systematic critical examination of the process and engineering intentions of the new facilities, to assess the hazard potential of maloperation or malfunction of individual items of equipment and the consequent effects on the facility as a whole. Provides the correct level of friction between brake pad assembly and wheel rim to safely stop bicycle in the required distance, under all operating conditions. Use these examples as your references so you can make sure that you can look into the content and format of your own haccp hazard analysis accordingly. This might lead to public outcry or even damage to the companys reputation. A reactor system is shown in the figure to which the hazop procedure can be applied this reaction is exothermic, and a cooling system is provided to remove the excess energy of reaction.
If, in the process of identifying problems during a hazop study, a solution becomes apparent, it is recorded as part of the hazop result. Fmea examples, presentations, templates, fmeca standards. Hazop preparation selection of hazop study team members information required for hazop study other responsibilities 3. Simple flashlight fmeca pdf, 11kb this fmea example combines the fmea and the criticality analysis, and provides a sample fmeca for our simple flashlight. 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. Hazard and operability study process safety an overview. Pdf a hazop methodology is presented where a functional plant. Hazop is the structured brainstorming technique to identify hazards involved in a chemical process plant. Hazop document is a relation structure table with the relationships between its columns. Hazard and operability study hazop definition a hazard and operability hazop study is a systematic brain storming process of assessing the existence. However, representing this in a bowtie consequences are colour coded to represent the impact type shows a potential imbalance between prevention and mitigation safeguards see figure 6. In openais, a dedicated design team joint work force of wp2 and wp3 has been setup for system design, which is currently working on the design of a simple system for m16 demo.
Guide words these are simple words which are used to qualify or quantify the intention in order to guide and. Most of these components make it the perfect tool to map your plans for every aspect of your lifetime and, even greater, to follow by means of on them. It is a risk assessment toll that provides information to the management who can make decisions to improve safety. Hazop is a good baseline methodology for evaluating issues related to chemical reactions within the individual processes by guiding the team in identifying potential critical deviations. For a simple facility it may be feasible to record all deviations considered but recording by exception is. Failure mode and effects analysis fmea effective fmeas. Responsibility and accountability for effective hazard identification will be placed on all employees, at all levels. Consider the transfer of acid from vessels a to b the hazop worksheet might look something like that shown in figure 5. The duties of the hazop secretary include preparing hazop worksheets, recording discussions during hazop meetings, and preparing the hazop reports.
Action taken action by guide word deviation possible cause existing safeguards. Risk analysis of a fuel storage terminal using hazop and. In this approach, the process is broken down into steps, and every variation in work parameters is considered for each step, to see what could go wrong. As we lacked a realistic system design in the early stage, we decided to create one out of the. There are many examples of blending hazop and fta in the literature.
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