Regarding the division method of corrosion loops in RBI
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Hello fellow prawns: Currently studying * RBI and the specific implementation methods of RBI. Many online RBI real-time methods involve or mention dividing the device into several corrosion loops, but they do not explain how to divide them? This is not explained in the RBI literature. Which prawn can provide information on this? Thank you very much! Waiting online. . . . . .
Don't just read it, publish the next one. Let me tell you my understanding: According to RBI's explanation, interconnected pipes and equipment of the same material and material should form a corrosion loop. However, in actual production, this division method is often cumbersome or too detailed. In order to meet the needs of corrosion management, it is fully believed that the scope can be expanded to a certain extent, such as interconnected equipment and pipelines of similar materials to form a corrosion loop.
No one replied to me. . . . . . . . .
I forgot about it, so I dug out a PPT from the Beijing Special Inspection Institute.
Thank you very much for your reply! Do you have a catalog of the 47 corrosion circuits of atmospheric and vacuum devices mentioned in the attachment? According to the explanation in the attachment, for example, if a tower has different materials at the top, tower body, and bottom, it must be divided into three corrosion loops. If the material of the pipes connected to these three sections is different from the material of the corresponding tower, is it also classified as another corrosion loop? With this division, a device must be divided into thousands of corrosion circuits. Why are there only 47?
Do other prawns have any other suggestions or opinions? It's been two days. . . Just one person answered. . .
It seems that there seems to be a gap in this aspect in China at present? Otherwise, it is more common for enterprises to self-manage. It's been over the weekend and no one has responded. Moderator, should I close the question?
There is no need to close it and wait for the participation of experts.
The purpose of the corrosion loop is to define the corrosion mechanism. Different mechanisms correspond to corresponding measures. For corrosion mechanisms, please refer to api 571 Damage mechanisms. RBI is a systematic and constantly updated assessment tool. It establishes a basic framework in the early stage and gradually improves it based on the actual operation of the device. The real effectiveness of RBI is the result of long-term optimization. To be honest, not many have been done well. Many of them were initially established and not implemented later.
At present, our idea is also to start from the aspect of the medium, and group the pipeline equipment of the same medium together to form a corrosion loop for management. Based on the real-time changes in the medium, we can judge its possible corrosion mechanism and the possible impact of changes in the medium on the corrosion loop. I have found a lot of information, including API571, API580, etc. The standard for classifying corrosion circuits is "the same failure mechanism (same medium, temperature, and material)". I feel that this classification is too detailed and will be very cumbersome to manage.
Dear prawns, isn’t the management of corrosion divided into areas according to the medium? After all, the corrosive media present in the same medium are the same. As long as the changes in the content of corrosive media at one or several points are monitored, the purpose of monitoring corrosion can be fully achieved. According to this idea, I think the so-called corrosion loop is just a name. As long as the same media, connected pipelines, and equipment are gathered together for management, it should be more reasonable and convenient for corrosion management.