Hazop is a qualitative technique that carries out a structured analysis of the process and allows identifying the deviations that may take. 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. Hazop preparation selection of hazop study team members information required for hazop study other responsibilities 3. The starting point for a hazop study is the deviation from the design intent. Nov 02, 2016 hazop study stands for hazard and operability study. Guide words these are simple words which are used to qualify or quantify the intention in order to guide and. The output from a hazop is a clear understanding of the hazards and operability issues around a design. Hazop, or a hazard and operability study, is a systematic way to identify possible hazards in a work process.
It is simple to implement and easy for most hazop participants to understand. 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. Item criticality matrix xls, 14kb this is an example of an item criticality matrix for our simple flashlight fmea example. It is also easy to learn hazop analysis by understanding initially simple industrial process operations and what can go wrong in them. 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. For a simple facility it may be feasible to record all deviations considered but recording by exception is. Although the basic hazop analysis approach is well established, the way that it is employed may. 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. Figure 12 shows liquid flowing into an atmospheric tank, t100. 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 template excel is costs nothing, crossplatform, adaptable, easy to use, and flexible.
For example, multiple failure scenarios may involve causes originating from more than one node or system. Risk analysis of a fuel storage terminal using hazop and. It is a risk assessment toll that provides information to the management who can make decisions to improve safety. A simple example of a hazop figure 1 refuelling at sea 1. A previously mentioned, the hazop team is a multidisciplinary team. 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. Hazop studies are conducted via the use of structured and systematic examinations based on guidewords. The concept involves investigating how the plant might deviate from the design intent.
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. This deliverable reports the hazard and operability study hazop of the. If so, we recommend you to browse through our downloadable and printable examples of haccp hazard analysis documents in pdf. 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. Hazop an abbreviated term of hazards and operability is defined as. Hazop is the structured brainstorming technique to identify hazards involved in a chemical process plant. Pdf a hazop methodology is presented where a functional plant. The following is an example of creating deviations using guide words and.
The process has been useful in securing safer plants at safer locations, in optimising. 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. Are you planning to create a haccp hazard analysis. 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. As the basic nature of the system is to process its input substances, i. Responsibility and accountability for effective hazard identification will be placed on all employees, at all levels. 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.
It can come into various forms such as a simple document, spreadsheet, or a database system where you will be able. 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. 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. In this example we shall apply the hazop technique to the equipment shown. Hazard operability study and risk assessment example. Simple flashlight fmeca pdf, 11kb this fmea example combines the fmea and the criticality analysis, and provides a sample fmeca for our simple flashlight. You and your family are on a road trip by using a car in the middle of the night. Guide words these are simple words which are used to qualify or quantify the. The duties of the hazop secretary include preparing hazop worksheets, recording discussions during hazop meetings, and preparing the hazop reports. 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. Hazop study deals with the identification of hazards due to process parameter deviations. 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. For example, many older plants are upgrading their control and instrumentation systems.
If, in the process of identifying problems during a hazop study, a solution becomes. 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. 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 primarily used to study complex operational hazards and functions in chemical processing plants but is also used in nuclear. These sample online hazop template excel will display that. Consider the transfer of acid from vessels a to b the hazop worksheet might look something like that shown in figure 5. Figure 1 is an example of a generic fmea worksheet, truncated after the recommended actions column. For instance, a company may end up designing poor products.
This technique can be used for continuous or batch processes andread more. Layer of protection analysis lopa approach is one of them. Jul 03, 2009 hazop leader the leader should be independent i. A hazop study identifies hazards and operability problems. The guide words shown in table 1 are the ones most often used in a hazop. If, in the process of identifying problems during a hazop study, a solution becomes apparent, it is recorded as part of the hazop result. 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. Hazop does not appear to fit into this simple model.
Fmea example step by step example of how to complete an fmea. Hazard and operability study hazop definition a hazard and operability hazop study is a systematic brain storming process of assessing the existence. Fmea examples, presentations, templates, fmeca standards. Action taken action by guide word deviation possible cause existing safeguards. 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. As we lacked a realistic system design in the early stage, we decided to create one out of the.
Case study all about hazard and operability study learn hazop. This is a very simple example and the course builds up more and more complex examples, so that you understand the technique very well. The primary strength of hazop is that it presents a systematic, disciplined and documented approach. Qi macros fmea excel template makes this process even easier.
Hazop document is a relation structure table with the relationships between its columns. Failure mode and effects analysis fmea effective fmeas. However, sometimes things fail to work as anticipated. 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.
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. The definition phase typically begins with preliminary identification of risk assessment. Fuel oil is transferred from a tanker to a ship as shown in figure 1. Hazop example for example a hazop node may be a day tank that pumps a reactant to the plant every day. For example, more reaction could mean either that a reaction takes place at a faster rate, or that a. This might lead to public outcry or even damage to the companys reputation.
Thus, the members of the team will vary from study to study with regards to their areas of. Hazard and operability study process safety an overview. These are shown as animations, which makes them super easy to understand. 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. Hazop study practitioners must avoid omitting scenarios that may not be identified by focusing on individual nodes. There are many examples of blending hazop and fta in the literature. Download hazop template and example hazop study report.
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. 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. Normally applied to a new process or design, it questions the design intent by applying simple guidewords e. 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. Polytechnic now teesside university, included simple hazop procedure to support and possibly determine failures that led to the flixborough incident. Definition what does hazard and operability study hazop mean. 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. Hazard and operability analysis hazop is a structured and systematic technique for. 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.
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. To achieve full benefits from a hazop study, it has to be properly documented and followed up. 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. Harm is the consequence of a hazard occurring and may take many forms.
Figure 12 shows liquid flowing into an atmospheric tank, t. Hazop study report template chemical engineering site. Hazop study is carried out during the design stage of the process plant or during carrying out any modification in the existing plant. 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. Norhayati, petroliam nasional berhad 4397000, 01 october 2003, uncontrolled copy, c bsi. A hazard and operability hazop study is a structured and systematic. 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.
Its purpose is to reduce risk and ensure the safety of workers in plant environments. Hazard identification procedures example 1 identification of workplace hazards will be accomplished through a cooperative effort between management, supervisors, employees and safety consultants. Download fmea examples, fmea templates excel, pfmea. A simple sketch describing part of the system is shown in figure 2. Leak typically was a cause for example for a deviation low flow or no flow. The study facilitator leader usually prepares the node list for a process prior to commencement of a study. 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. 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. In the current industrial revolution, several manufacturing companies are coming up with the aim of satisfying the market. A multidisciplinary team or a hazop team carries out a. Risk analysis of a fuel storage terminal using hazop and fta.
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