What are the differences in the design and manufacturing of pressure vessels of categories I, II, and III?
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TSG 21—2016 was issued on February 22, 2016. For pressure vessels containing media from Group 1, the classification categories are only II and III; whereas for pressure vessels containing media from Group 2, the classification categories are I, II, and III. So what are the differences in terms of materials, design, and manufacturing between pressure vessels of categories I, II, and III? In particular, what are the differences in materials, design, and manufacturing between Class I and Class II pressure vessels?
First, it’s crucial to understand why there are first, second, and third categories. As for the manufacturing of special equipment, there is only one requirement: ensuring quality; no differential treatment is allowed. This is the attitude that must be adopted, otherwise problems will arise
This post was last edited by gn_1984 on 2016-8-26 at 10:28. Under conditions where the medium is not harsh, there is generally no strict distinction in manufacturing between Class I and II. When the medium is different, medium-class II media are generally explosive in nature, and certain design choices and inspections are more stringent than those for class I. As for Category III, which is further divided into high pressure and medium/low pressure, as well as situations involving extremely high or high levels of hazard to the medium, specific relevant standards set out the requirements. Generally, for III, there is a risk report to assess the potential risks associated with the equipment and to determine how to control them during the design and manufacturing processes.
I also hope someone can provide a detailed answer. It’s categorized; what are the specific differences in terms of design and manufacturing, and when and where do they occur?
**The pressure vessels have been classified; you figure out the rest on your own
There is not much difference in manufacturing; it is all carried out according to standards and design drawings. However, the way in which problems are handled during production varies in severity depending on the specific circumstances
During the manufacturing process, there are Class 2 and Class 3 standards, which are more stringent, and the testing procedures also differ. It is mainly determined by the medium; the standards for things such as pipe ends, etc., are also different
There are some differences in the choice of materials, but the manufacturing process still requires a proper attitude.:lol