Received some feedback information, everyone is more interested in safety valve calculation
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Safety valve calculation seems very simple, just a few steps, but if you want to give a complete lecture, it will be very complicated and involve all aspects, and there must be actual examples of engineering design, otherwise everyone will be confused after the lecture. I've been quite busy recently and haven't had a long time to sort it out. I can only think about a few things and talk about them. Or if you encounter practical problems with safety valve calculations, we can also discuss the matter, which will be easier. I wonder if there is a way to create a dedicated post for PSV so that I can update it step by step. Once organized in this way, it will be a complete lecture. Or some other way. In addition, I want to state first that my idea is also to introduce some common sense to domestic colleagues about safety valve design. After all, it is the final protection in the refinery. Everyone is welcome to discuss and make progress together.
To calculate the safety valve, you must first determine the basis for the calculation, that is,: Applicable standards, whether they are national standards, API, ASME, British or Japanese standards
I’m looking forward to the lecture given by the original poster: handshake
Our unit uses API standards
The moderator can give a lecture in this post. After your lecture is over, the moderator will organize the content for everyone to learn.*
The forum seems to have similar information to this http://bbs.hcbbs.com/thread-4192-1-1.html http://bbs.hcbbs.com/thread-135340-1-1.html
It seems like it's all about safety valve calculation software. In fact, the difficulty and key of safety valve calculation is not to calculate ORIFACE size. Those calculation formulas are clearly written in API and ASME standards. I can't remember them. I can just look them up when needed. Moreover, many software and EXCEL SPREADSHEET calculation sheets have these formulas embedded in them, so there is generally no mistake. The difficulty and key of safety valve calculation is to determine all possible overpressure relief cases ("operating conditions"? Can't find the appropriate Chinese word), and then find the CASE of the maximum relief volume among them; sometimes the difference in relief volume required by several overpressure possibilities is too large, resulting in a large difference in the size of the required safety valve, so that two safety valves have to be installed to handle different cases respectively. These are not things that the software can tell you. Once the design working conditions for calculating the safety valve are determined, the required maximum relief volume can be calculated. It is impossible for the software to calculate all working conditions. Sometimes you need to additionally calculate the required maximum discharge volume, then enter the discharge conditions and use the software to calculate the required discharge area. Finally, when determining the orifice size, some engineering experience and judgment are required. Therefore, the software is only the simplest step in the PSV calculation process. If you do not have software, you can still calculate the PSV, and it will help you understand the design and selection of the PSV. i have met many people * You are accustomed to hand calculations and do not rely on any software. And if you understand the process of safety valve calculation, you can also program an EXCEL SPREADSHEET for use. I have compiled these little things myself, but later when it came to company standardization and quality control, I had to use the company's, which of course has stronger functions and is more complex. Since everyone is interested, I will show off. I am going to open another post to talk about it. If you have any questions or corrections, please ask them. It is a two-way interaction. It is also interesting for me to talk about it. However, remember copyright and don't break the rules here. I need to prepare and try to start as soon as possible. If it is right, everyone will support it. I can also upgrade earlier and buy more information. If something is wrong or there is a problem, just point it out so that I can make corrections. In addition, after being introduced for many years, some English words have no domestic equivalents, and when I first left, the domestic safety valve calculations were very simple. Sometimes English may be more fluent, don’t get me wrong. I think those E-texts are very simple and everyone knows them. Moreover, the mutual comparison between Chinese and English will be more conducive to everyone’s future work.
I am very much looking forward to caldo’s lecture. I feel that I have a little knowledge about PSV and I hope to have a systematic look at it. I strongly support you.
:) Although the design has been around for some years, I still look forward to CALDO's comprehensive explanation of safety valves and safety valve calculations. :victory: eagerly awaited
Looking forward to caldo’s lecture:victory:
The author is very welcome to give a lecture on the design of safety valves and give a more systematic explanation. As the poster said on the 7th floor, the key to the calculation of safety valves lies in "the calculation of safe relief amounts under various accident conditions", and the calculations under some working conditions are more complicated. Almost all process professionals have calculated safety valves, but not many can really figure this out. I also hope that the moderators will highlight this topic and provide support.
I'm really looking forward to the poster's explanation and everyone's communication. I'm still a newbie and I still have a lot to learn.
Haha, I hope the poster can tell you more about the calculation of the discharge amount under specific working conditions, which is currently involved.
This is where the chemical process comes in. I highly recommend it and look forward to the next article.
I still hope that the poster will sort it out before uploading it. Don’t post it today at 1 o’clock and tomorrow at 1 o’clock. This is an irresponsible attitude.
I am looking forward to it very much. It happens that the selection of the safety valve pipe diameter is used in the work.