What is the relationship between equipment material selection and model selection?
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Equipment selection and material choice are both quite challenging tasks. There is often a close relationship between the two, as they are not separate from each other. When choosing materials, factors such as the medium, temperature, pressure, cost, and operating environment must be taken into account. Although equipment is generally universal in use, when taking on a new project or process, one is faced with new materials and chemicals whose physical and chemical properties are unknown, and no prior experience with them exists; this makes material selection very difficult. The issue of material selection cannot be handled carelessly or perfunctorily – it is a serious matter that relates to professional ethics. This is especially true when dealing with media composed of mixed components, as material selection becomes even more challenging. So what can be done? Are there any good solutions?
And it seems there’s no universal design manual available for reference, right?
Can the material be selected by conducting hanging slice experiments?
Simply put: selection is related to the process, while material choice is related to the medium, temperature, and concentration
Surely, the first step is to consider the selection of the appropriate type; this choice affects the difficulty of processing as well as future maintenance tasks. After making that decision, materials are selected based on factors such as the properties of the medium, operating temperature, and cost. Generally speaking, choosing the right material isn’t that difficult these days – there are standards for selecting materials for pipes, and there are also many recommendations in standard ISO 20583; you can take a look at those.
There are still some differences between the two
Material selection is more closely related to the field of engineering; for choosing materials, it’s necessary to consult a lot of information. Data on many corrosive substances cannot be found in domestic sources, as foreigners have conducted more in-depth research in this area. It’s important to pay attention to collecting and gathering such information over time
In large engineering companies, newcomers in the equipment field do not encounter this problem, as the process data sheets provided by the process team include information on the main materials for the equipment. What if it’s not provided? First, check whether such media are mentioned in the commonly used standard specifications; for example, HG/T20581-2011 does not mention them. I recommend several books, including \"Corrosion Data Handbook\" authored by Zuo Jingyi ； “The Ullig Corrosion Manual”, translated by Yang Wu and others – a very useful book. It will definitely help you