ANSI B16.47 is US flanges standard, ANSI B16.47 is flanges dimension expand than ANSI B16.5, flanges size NPS from 26"-60", flanges type weld neck and blank. ANSI B16.47 have series A and series B, Series A is expensive than B, ANSI B16.5 size from NPS 26" to 60, also flanges rating class from 75 to 900.
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