List of guidewords and prompt questions a typical list is shown in appendix 3. The risk of lopa and sil classification in the process. The hazop study should preferably be carried out as early in the design phase as possible. Operability study hazop and hazard identification hazid was used. This is the reason why you have to ensure that you can analyze the hazards that are present in your business the earliest time possible so that you can eliminate them and reduce. The purpose of this document is to provide guidance for the carrying out of hazard and operability studies hazops and on the reporting of the study results. A potential hazop study leader or hazop study chairperson must be aware of all of these. Applied in its fullest sense, a complete hazop study would require a large investment in time and effort by the people involved. The hazop study on the main contaminant destruction process was detailed in revisions a to c of this report.
Example the objective of the hazop is to assess and evaluate potential hazards related to the implementation of the planned modifications. They can direct the teams attention to highlighted entries in the worksheet and readily display checklists and other documents. The objective of this standard is to provide a guide for hazop studies of systems utilizing the specific set of guide words defined in this document. The title should clearly and unambiguously identify the facility covered by the study. The following is an example of creating deviations using guide words and.
To buy the course, simply select one of the options below. Risk analysis of a fuel storage terminal using hazop and. Hazard and operability analysis hazop is a structured and systematic technique for. A multiplechoice answer process will be introduced into the case study unit. This module includes a hazop study example for the explosion at the caribbean. To produce a batch of 10% concentration hcl hydrochloric acid steps. Hazop preparation it is the responsibility of the responsible officer to initiate the hazop study where the project or modification meets the criteria.
Following this study, two additional hazops were performed. It is important to remember at all times that hazop is an identifying technique and not intended as a means of solving problems nor is the method intended to be used solely as an undisciplined means of searching for hazardous scenarios. Role of valves in hazop analysis, safety and environmental. Valve a phosphoric acid study line 1 phosphoric acid delivery line. In spain, examples include an accident at the repsol refinery in. The emphasis in the hazop study is on identifying potential problems, not necessarily on solving them. Once the hazop analysis is complete, the study outputs and conclusions should be documented commensurate with the nature of risks assessed in the study and per individual company documentation policies. A hazard and operability hazop study is a structured and systematic examination of a planned. Practical approach to vendor package hazop studies and. Ici no longer exists today in its original avatar, but in the form of several new companies, who took over the ici plants, made new ones, etc, etc. For example, many older plants are upgrading their control and instrumentation systems. In order to perform a hazop study, an sop must be complete with operating instructions and a detailed schematic drawing must be available.
This advisory paper gives a broad indication of what is required in undertaking a hazop with a list of references included for further study. Additional streamlining can be achieved by grouping related processes and supplementing the hazop study with whatif analysis. In total, this study identifies four vehiclelevel safety goals and 125 eps system safety requirements an output of the iso 26262 process. Complete and document your hazop study using your smartphone tablet while onsite with your. Due to a lack of sophisticated tools and expertise, the results of such studies remain in paperwork form and important data may be lost over time. What is hazop instrumentation study material inst tools. Many hazop study team leaders act as their own scribe. Hazop study hazard identification and risk assessment. Some examples of combinations of guidewords and parameters. In addition, hazop can be performed on a line in the flow sheet that includes valves and pumps. Over the years, a number of hazardous industry advisory papers and other guidelines have been. Functional safety assessment of a generic electric power.
Hazop methodology may be found within iec international standard 61882, hazard and operability studies hazop application guide. Use of hazop study recording software gives leaders a subtle but powerful form of control over the team. Consider the flash drum as the hazop study node, conduct hazop fcv 5 fcv 2 fcv 7 ti 4 ti 3 fi 1 ti 1 fi 6 fi 2 ti 3 ti 2 ti 8 fi 8 lic 8 fi 9 fcv 9 fcv 8 pic 9 process fluid steam v40 e30 e20 x ad 90 mol % x af 50 mol % tic 7 study node. Fenkins chow the hong kong polytechnic university 9 september 2006 hazop stands for hazard and operability analysis there are 2 methods to identify hazards. Hazop document is a relation structure table with the relationships between its columns. Reverse osmosis ro water is added to the batch mixer via centrifugal pump. This document presents some guiding principles in the execution of hazop analyses.
Here is an example of how a hazop study can be used by an expert team to assess the procedure involved in chemical production. Consensus on template format for recording study outputs consensus on hazop guide words to be used during the study. Download hazop template and example hazop study report. Consensus on template format for recording study outputs. Hazop analysis complete report linkedin slideshare. Hazop study report, remediation of the former orica. Title page the study title should be displayed both on the cover and on a separate title sheet. Hazop report clients template bornemann consultancy. Additional streamlining can be achieved by grouping related processes and supplementing the hazop study. Commercial hazop pha software tools replicate the standard format for a hazop worksheet 2, as shown in table 1. This technique can be used for continuous or batch processes. This study follows the concept phase process in the iso 26262 standard and applies hazard and operability study, functional failure modes and effects analysis, and systems theoretic process analysis methods. Risk analysis of a fuel storage terminal using hazop and fta.
The application of hazop, a process hazard identific ation and control method, has been demonstrated in the effluent treatment. 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. These can be utilised by you as examples of hazop analysis. A hazard and operability study, commonly referred to as a hazop study, is a structured analysis. However, it was the introduction of process safety regulations particularly in the united states in the late 1980s and early 1990s that caused the dramatic. Application of hazard and operability study hazop in evaluation of health, safety and environmental hse hazards article pdf available july 2012 with 1,884 reads how we measure reads. This technique can be used for continuous or batch processes and can be adopted to evaluate written procedures. In other cases, the individual sent to participate in the hazop study may not have been exposed to and knowledgeable of the types of the design limits that are pursued during the hazop study. The hazop and the whatif analysis have become two of the most common qualitative methods used to conduct process hazard analyses in the petrochemical industry. The objective of hazop is to assess the hazard potential of maloperation or malfunction of equipment and the consequent effects on the facility. This standard is identical with, and has been reproduced, from iec 61882.
Hazard operability study and risk assessment example. For example, is the study being prepared to satisfy conditions of development consent or at the companys initiative as part of safety upgrading. A hazard and operability study or hazop is a systematic, critical examination by. The responsible officer will first appoint an independent hazop leader to act as the chairperson for the hazop meetings.
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. Successful application of any risk management model requires that. A hazop study is performed by an interdisciplinary team of experts including engineers, chemists, facilities managers and safety officers to identify procedural risks, process hazards, and design flaws. As iec 618822003 hazard and operability studies hazop. It is used to identify deviations from normal safe operation. Hazop can be applied on units such as reactor, vessel or fractionator as a study node. A series of prompts will be developed to act as case study aids.
Hazop is defining hazards key words, consequences, causes and actions to be done to prevent an assumed hazardous scenario. It attempts to identify how a process may deviate from the design intent. The application of these guide words may be illustrated by the example already described. Client objectives scope objectives of this hazop location of the hazop meeting example the objective of the hazop is to assess and evaluate potential hazards related to the implementation of the planned modifications. Pdf application of hazard and operability study hazop. 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. This limitation often causes hazop study teams to give unwarranted credit to safeguards 6. Documents detailing design and operation philosophy, as required. The quality of the hazop study team composition experience as built drawings project budget planning inherent safety credibility, information of loc scenarios for sil lopa the risk analysis capability of the team consequence frequency assessment. Another key issue that is often not investigated is the potential interactions between the vendor package and the process system.
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