api 5000Beware, some suppliers and manufacturers supply normal A105N 36K material flanges stamped as 3,000 or 5,000, these interconnect with API sizes (example a 2 ANSI A105 1500 class flange rated at 3,700 psi CWP is the same asAPI 5000 FLANGE DIMENSIONS INDUSTRIES AND APPLICATIONS WIDELY USED IN THE INDUSTRIES Pumps, Valves, and vessels in manufacturing and food processing. Pipe