api 5000API 6A6B6BX FLANGE STANDARD, Class 2000PSI, 3000PSI, 5000PSI, 10000PSI, 20000PSI,data sheet including OD, ID, Thickness, Neck dimensions, bolt holes5000# API Socket Weld Flange is made up of A105 carbon steel and has a minimum yield strength of 45000. API 10000 Flange is manufactured from hh steel alloy after heat treatment