To which group do vinyl chloride media belong?
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Dear experts, I have a question: Vinyl chloride is considered a medium-hazardous substance； At the same time, its lower and upper explosion limits are 3.6–33%, classifying it as an explosive medium as well. According to the classification of media in the constant-volume regulations, it ultimately belongs to the first group of media. Is that so?
Explosive media belong to the first group.
TSG 21-2016 Appendix A: A1.1 Group 1 media: Chemical media with an extremely high or high level of toxicity, explosive media, and liquefied gases; Group 2 media: Media other than those in Group 1. It’s clearly stated there
I don’t know much about the properties of vinyl chloride; according to these regulations, it falls into the first group of media. Thank you!
Is vinyl chloride considered a medium-hazard substance? According to these two standards, both represent extreme hazards.
Are you going to make a converter? The converter does not inherit from a class
According to the TSG21 standards, the toxicity of the medium is determined in accordance with HG20660-2000. The list above explicitly classifies vinyl chloride as a medium-hazardous substance, but it is noted that when toxicity is used to determine the sealing and integrity requirements for pressure vessels, vinyl chloride should be classified as a highly hazardous chemical substance. Therefore, the equipment is classified as having moderate hazard, and its sealing is designed and manufactured to handle extreme hazard conditions; however, since vinyl chloride is a type of medium, the equipment still needs to be classified as belonging to category 1 media. HG/T20660-2017 directly classifies vinyl chloride as a highly hazardous medium.