What does the steel stamp marking on a cylinder filled with a mixed gas look like?
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The company uses gas cylinders containing a mixed gas, with 94% He, and the remaining components being hydrogen, oxygen, and nitrogen. The steel stamp on these cylinders only indicates “He”; according to the standards, it should be “He-M-?”. I would appreciate some guidance from experts.
The poster is correct: according to Annex B of TSG R0006—2014 \"Regulations on the Technical Inspection of Gas Cylinders\", regarding cylinder markings, for mixed gases: the name or chemical formula of the main component of the mixture (the one with the highest concentration) should be indicated； Followed by —M—, then the letter indicating the properties of the mixed gas: T: Toxicity; O: Oxidizing property ； F: Flammability ； C: Corrosive ； The order is TOFC ； There are several features; type a few letters ； For example, coke oven gas: 63% H2, 25% CH4, 6% CO ； 4% N2, 2% CO2: Designated as: H2-M-TFC ； Refers to a mixed gas whose main component is H2; this mixed gas is toxic, flammable, and corrosive ；
Thank you for the reply; the standards are indeed like that. I’m not sure what the actual usage is like in various organizations, and I was unable to find any pictures of the stamp marks for specific mixed gases online either.
This is really something I’ve learned; I hadn’t come across it before