A105 Raised Face Blind Flange Manufacturer: ASTM A105 RF Blind Flanges, Pressure PN100 (600LB), Size DN150 (6 Inch), ASME B16.5 Standard. Keywords: Blind Flange, ASTM A105, 6", Class 600, RF. Type: Blind Flange. Material: ASTM A105. Size: 6". Pressure: Class 600. Face: RF. Standard: ASME B16.5.