HAZOP analysis

There are many organizations that carry out Hazop studies, including both domestic and foreign companies. In my opinion, when conducting Hazop studies, the work experience of the person in charge of the Hazop process is extremely important; it’s best to have practical experience in carrying out similar projects.

I have a paper on the HAZOP analysis of the carbon monoxide plant at Yangzi Petrochemical; I’ll send it to you~ Please give me your email address~

zhangsheng1019@163.com. Thank you, the person above!

yunzhongcheng@126.com Thank you, 3rd floor

This post was last edited by yifei5416you on 2009-9-13 22:46. 2.2.3 Participants in HAZOP The members of this review team include: ① Team leader – from Tech-nip in the Netherlands； ② The design personnel from the three design firms – Nanjing Yangzi Petrochemical Design Engineering Co., Ltd., Sinopec Group Nanjing Design Institute, and Hualu Engineering Technology Co., Ltd. – including process engineers, instrumentation engineers, and safety engineers, were involved throughout the entire process. Other relevant professionals such as equipment engineers were not involved throughout the process but provided their expertise when needed ； ③ Represented by the patent holder, Technip ； ④The operators and drivers are assigned by the owner, Yangzi Petrochemical Aromatics Plant ； ⑤Clerk. 2.2.4 Review steps a) The safety consultant from Dutch Technip provides a brief introduction to the methods used in HAZOP analysis. b) The process engineer from the patent holder provides a brief introduction to the entire process flow, and divides the equipment into multiple smaller sections—nodes—based on this flow. Each node is reviewed following the same steps. c) When reviewing each node, the process engineer first provides a detailed description of that section of the process, outlining the design parameters for various equipment, instruments, and pipelines. After understanding the process, use guiding words for analysis and discussion; common process guiding words are shown in Table 1. @ Volume 8, Issue 8, 2008: Table 1 – Common Process Guidance Terms. Sequence Number | Guidance Term | Meaning; Sequence Number | Guidance Term | Meaning. 1 | No flow | Flow rate is zero; 7 | High temperature | Temperature is higher than normal. 2 | Reverse flow | Flow in the opposite direction; 8 | Low temperature | Temperature is lower than normal. 3 | High flow rate | Flow rate is higher than normal; 9 | High liquid level | Liquid level is higher than normal. 4 | Low flow rate | Flow rate is lower than normal; 10 | Low liquid level | Liquid level is lower than normal. 5 | High pressure | Pressure is higher than normal; 11 | Noise | Mechanical noise. 6 | Low pressure | Pressure is lower than normal; 12 | Combustion | Fire outside the equipment. d) The team members used the process guidance terms to select a hypothetical deviation for each of the 131 nodes identified on the process piping and instrumentation diagram for the carbon monoxide plant. They worked together to determine the causes of these hypothetical deviations as well as the potential dangerous consequences they might lead to. Additionally, they assessed whether the safety measures implemented in the design were sufficient, based on the causes of the deviations. If the required safety level is not achieved, the review team leader will issue a review opinion, requesting the designers to add safety measures or modify design parameters to improve the safety of the equipment. Then, analysis and discussion of the other deviations are carried out until all deviations related to that node have been analyzed. e) This is illustrated using the analysis process of node 3 as an example: light naphtha coming from the boundary area enters buffer tank FA-15101, and is then transported to the natural gas pipeline by a naphtha pump. The light naphtha coming from the boundary area enters the natural gas pipeline equipped with flow control valves, emergency shut-off valves, manual valves, as well as measuring instruments for pressure, temperature, flow, etc. First, assume that there is an excessive naphtha flow rate; the possible causes could be a fault that causes control loop L-15111 to open, or the opening of the LV-15111 bypass. Then, analyze the possible consequences resulting from these reasons. Analysis revealed that a fault opening in control loop L-15111 would cause the level in the naphtha buffer tank to rise, with the naphtha being carried into the flare system. Next, corresponding safety measures are established based on an analysis of different possible outcomes: ① A high liquid level alarm LSHH～151 12 is installed in the naphtha buffer tank to enable timely detection of any abnormal increases in liquid level ； ②By setting the interlock cut-off valve XV-151 1 1, the naphtha can be shut off promptly. Finally, based on the safety measures, precautions or recommendations are proposed: reconsider placing XV-151 11 as close as possible to the naphtha buffer tank. To this point, the analysis of the fault in control loop L-15111 that caused an excessive naphtha flow rate has been completed. Using the same method, it is possible to analyze the situation where the opening of the LV-151 1 1 bypass leads to an excessive flow rate of stone oil; together, this constitutes an HA-ZOP analysis for excessive flow rates. Subsequently, analyses are conducted separately for high (low) flow rates, high (low) temperatures, and high (low) pressures, ultimately resulting in a complete HA—ZOP analysis for node 3, as shown in Table 2. 2.2.5 Preparation of the HAZOP analysis report: After the meeting, Technip prepared a formal report based on the feedback from the HAZOP analysis review. The report not only contains suggestions for design modifications but also requires that the designated responsible units complete the revisions to the documents etc. within the specified time frame; if certain suggestions are deemed unfeasible, the reasons should be stated in the report.

Thank you for sending it! Email: wzh_ren_0@163.com 3# yifei5416you

3# yifei5416you, could you send me an email? That CO Hazop analysis, yuyufg@foxmail.com, thank you!

Reply to 3# yifei5416you: OP, could you send me one? yuyufg@foxmail.com, thank you!

houjunj@126.com Thank you

Could you send it to me too? lan*n1206@163.com;Thanks!!