Blind flange Specifications: 1) Size: 1/2" - 24" ; 2) Pressure rating: 150 - 2500lbs; 3) Material: F316, F304, F316L, F304L, A105, F5, F11, F22, 15CrMo, 12CrMoV, Q235, 16Mn, 20# etc. 4) Face: FF/RF/RTJ etc. 5)Standards: ANSIB16.5/ASMEB16.47/DIN/JIS/GB.