Are there flanges that meet US standard Class 125?
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I’ve been using flanges that meet national standards and those specified by the Ministry of Chemical Industry; American standards are used less frequently. No matter how I look, the lowest class I find is Class 150. Yet when searching online, I can still come across many flange valves labeled as Class 125/Class 150, which means such products do exist. I asked the suppliers, and they confirmed that they are available, stating that their dimensions are the same as those of Class 150. But I can’t find any information about them in the standards. Could someone kindly send me the relevant standards?
Just stating the standard number shouldn’t violate any rules, right :shutup:ASME B16.1
Upon checking the American standards, ASME B16.5, ASME B16.47, and API 6A do not contain it
16.5, 1.47, and 6a all refer to steel valves; cast iron is mentioned in 16.1, and wall thickness is also considered.