api 5000API 5000 Flange Dimensions Industries and Applications Widely used in the industries. Pumps, Valves, and vessels in manufacturing and food processing. Pipe*Tolerances and ring gaskets are according to API 6A. Materials for API 6A Type 6B 5000 psi(34.5 MPa) Weld Neck RTJ Flange, API 6A 6B Weld Neck