... Flange, Spectacle Blind, etc. 2.Size 1/2"-72" 3.Class 150#, 300#, 400#, 600#, 900#, 1500#, 2500# 4.Specification Carbon Steel ... FLANGE. LAPJOINT FLANGE, THREADED FLANGE. RING TYPE JOINT FLANGE. Pressure Class: 150, 300, 400, 600, 900, 1500, 2500 ASME/ANSI B16.47(SERIES ... 1500, 2500 ASTM/ANSI B16.48: ( Figure-8 blanks) Pressure Class: 150, 300, 400, 600, 900, 1500, 2500 MSS SP44: WELDING NECK FLANGE ...