Download the PDF file:  API 6A STANDARD FLANGE DIMENSIONS TYPE 6B 34.5 MPA 5000PSI Dimensions of Type 6B flanges for 5000 psi (34.5 MPa) rated working pressure. Type 6B flanges are of the ring joint type and are not designed for face-to-face make-up. The connection make-up bolting force reacts on the metallic ring gasket. All