A 2 inch 1500 ansi flange was ordered. I rejected it for 2 reasons. 1) The flange was only stamped 900. B16.5 para 4.1.3 states that the applicable rating be stamped on the flange ie: 900, 1500 or 900/1500. 2) The MTR refered only to class 900. The supplier argued that because the two ratings (900 and 1500) were dimensionally the same that it was ok. I said not. Whats the thoughts?
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