api 50005000# 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 treatmentAPI 6A - TYPE - 6B 34.5 MPA (5000 PSI). Size. B. OD. C. (MAX.) K. P. E. T. Q. X. BC. N. H 2) RING GASKET ACCORDING TO API 6A