The issue of selecting pipe color rings
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How do people choose the color rings for pipes after they’re installed? There is a standard, GB 7231-2003, but the classification in it seems rather vague. To be more specific, I would like to ask what colors the color rings for carbon dioxide (g), chlorine (L), and phosphorus trichloride (L) are. I hope the experts will be kind enough to share their insights~
There are too few standards in the national guidelines; they’re practically not useful at all. HG has a standard, but it’s old; it’s not clear whether it’s still in use. It would be best if the company established its own standards, as long as it can distinguish things clearly. ;P Of course, the commonly used colors can’t be messed up