Overview ANSI B16. 47 Series B Flanges :
ANSI B16. 47 series B flanges are much thicker, heavier, and stronger. They are of the same size and render a similar pressure rating. They can withstand more external loading than any other series B flange. It uses smaller fasteners, so you might have to use more bolts and nuts while installing them than the series A flanges, which have a smaller bolt circle diameter.
The smaller the bold circle diameter, the less flange movement after installation. Both series A and B are defined into weld neck flanges and blind flanges in raised face type. Only series A defines the ring type joint, flanges from Class 300 to class 900. From a commercial point of view ANSI B16. 47 flanges are more experience, but they are robust and serve as an efficient solution for more pressure handling.
