These Class 300 Steel Raised Face Blind Flanges are stronger than cast flanges. Raised face flanges are used for sealing off piping systems and are rated for use in high-pressure and high-temperature applications. Material meets ASTM A36 or A105 Steel requirements. Dimensions and Tolerances per ANSI/ASME B16.5. Bolt pattern per ANSI/ASME Class 300. Flanges are painted black for corrosion resistance. We stock ANSI/ASME B16.5 flanges in both domestic (AIS) and import options. Our machine shop can also modify ANSI/ASME flanges to meet your project requirements.
Downloads:
| API Part Number | Size | O.D. | I.D. | Ø B.H.C. | Ø B.H. | # B.H. | THK | Ø RF | Weight Lbs |
| RFB0050-30 | 0.5 | 3.75 | — | 2.63 | 0.750 | 4 | 0.563 | 1.375 | 1.4 |
| RFB0075-30 | 0.75 | 4.63 | — | 3.25 | 0.750 | 4 | 0.625 | 1.688 | 2.5 |
| RFB0100-30 | 1 | 4.88 | — | 3.50 | 0.750 | 4 | 0.688 | 2.000 | 3.0 |
| RFB0125-30 | 1.25 | 5.25 | — | 3.88 | 0.750 | 4 | 0.750 | 2.500 | 4.0 |
| RFB0150-30 | 1.5 | 6.13 | — | 4.50 | 0.875 | 4 | 0.813 | 2.875 | 6.0 |
| RFB0200-30 | 2 | 6.50 | — | 5.00 | 0.750 | 8 | 0.875 | 3.625 | 8.0 |
| RFB0250-30 | 2.5 | 7.50 | — | 5.88 | 0.875 | 8 | 1.000 | 4.125 | 11.0 |
| RFB0300-30 | 3 | 8.25 | — | 6.63 | 0.875 | 8 | 1.125 | 5.000 | 15.0 |
| RFB0350-30 | 3.5 | 9.00 | — | 7.25 | 0.875 | 8 | 1.188 | 5.500 | 20.0 |
| RFB0400-30 | 4 | 10.00 | — | 7.88 | 0.875 | 8 | 1.250 | 6.188 | 25.0 |
| RFB0500-30 | 5 | 11.00 | — | 9.25 | 0.875 | 8 | 1.375 | 7.313 | 35.0 |
| RFB0600-30 | 6 | 12.50 | — | 10.63 | 0.875 | 12 | 1.438 | 8.500 | 46.0 |
| RFB0800-30 | 8 | 15.00 | — | 13.00 | 1.000 | 12 | 1.625 | 10.625 | 75.0 |
| RFB1000-30 | 10 | 17.50 | — | 15.25 | 1.125 | 16 | 1.875 | 12.750 | 124.0 |
| RFB1200-30 | 12 | 20.50 | — | 17.75 | 1.250 | 16 | 2.000 | 15.000 | 174.0 |
| RFB1400-30 | 14 | 23.00 | — | 20.25 | 1.250 | 20 | 2.125 | 16.250 | 246.0 |
| RFB1600-30 | 16 | 25.50 | — | 22.50 | 1.375 | 20 | 2.250 | 18.500 | 315.0 |
| RFB1800-30 | 18 | 28.00 | — | 24.75 | 1.375 | 24 | 2.375 | 21.000 | 427.0 |
| RFB2000-30 | 20 | 30.50 | — | 27.00 | 1.375 | 24 | 2.500 | 23.000 | 515.0 |
| RFB2400-30 | 24 | 36.00 | — | 32.00 | 1.625 | 24 | 2.750 | 27.250 | 800.0 |
