What’s the Difference Between Series A and Series B Flanges?
ASME B 16.47 is one of the American standards. It refers to one of the large-diameter steel flanges. The standard also covers the requirements about flange joint, flange bolting, flange gaskets, etc. In addition, the standard covers the design of flanges from NPS 60 to NPS 24. With the rating classifications 900, 600, 400, 300, 150, and 75, the standard ASME B 16.47 offers measurement, dimensions, marking, tolerances, and pressure temperature for the pipe flanges. ASME B16.47 standard comes in two series, Series B and Series A flanges. The differences between these flanges are: Characteristics ASME B16.47 Series A flanges are relatively thicker, heavier, and more robust than Series B flanges with the same size and pressure ratings. Hence, series A flanges can withstand extra external loading compared to the Series B flanges. Required Fasteners The fastener quality requirement for ASME B16.47 Series A flanges is lesser than the Series A. Class 150 Series A flange requires 28 bolts of 1...