These Class 300 Forged Steel Raised Face Blind Flanges are stronger than cast flanges. These forged steel raised face flanges are used for sealing off piping systems and are rated for use in high-pressure and high-temperature applications. The material meets ASTM A105 requirements. Dimensions and Tolerances per ASME B16.5. Bolt pattern per ANSI Class 150. Flanges are painted black for corrosion resistance. We stock 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 |
