Class 150 Steel Raised Face Blind Flanges are stronger than cast flanges and are rated for high-pressure or high-temperature applications. Dimensions and Tolerances per ANSI/ASME B16.5. Material meets ASTM A36 or A105 Steel requirements. Bolt pattern per ANSI/ASME Class 150. 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 | 0.5 | 3.50 | — | 2.38 | 0.630 | 4 | 0.440 | 1.375 | 1.0 |
| RFB0075 | 0.75 | 3.88 | — | 2.75 | 0.630 | 4 | 0.500 | 1.688 | 1.0 |
| RFB0100 | 1 | 4.25 | — | 3.13 | 0.630 | 4 | 0.563 | 2.000 | 2.0 |
| RFB0125 | 1.25 | 4.63 | — | 3.50 | 0.630 | 4 | 0.630 | 2.500 | 2.9 |
| RFB0150 | 1.5 | 5.00 | — | 3.88 | 0.630 | 4 | 0.690 | 2.875 | 3.5 |
| RFB0200 | 2 | 6.00 | — | 4.75 | 0.750 | 4 | 0.750 | 3.625 | 5.0 |
| RFB0250 | 2.5 | 7.00 | — | 5.50 | 0.750 | 4 | 0.880 | 4.125 | 9.0 |
| RFB0300 | 3 | 7.50 | — | 6.00 | 0.750 | 4 | 0.940 | 5.000 | 9.0 |
| RFB0350 | 3.5 | 8.50 | — | 7.00 | 0.750 | 8 | 0.940 | 5.500 | 13.0 |
| RFB0400 | 4 | 9.00 | — | 7.50 | 0.750 | 8 | 0.940 | 6.188 | 17.0 |
| RFB0500 | 5 | 10.00 | — | 8.50 | 0.875 | 8 | 0.940 | 7.313 | 19.7 |
| RFB0600 | 6 | 11.00 | — | 9.50 | 0.875 | 8 | 1.000 | 8.500 | 27.0 |
| RFB0800 | 8 | 13.50 | — | 11.75 | 0.875 | 8 | 1.130 | 10.625 | 43.5 |
| RFB1000 | 10 | 16.00 | — | 14.25 | 1.000 | 12 | 1.190 | 12.750 | 65.5 |
| RFB1200 | 12 | 19.00 | — | 17.00 | 1.000 | 12 | 1.250 | 15.000 | 123.0 |
| RFB1400 | 14 | 21.00 | — | 18.75 | 1.125 | 12 | 1.380 | 16.250 | 133.3 |
| RFB1600 | 16 | 23.50 | — | 21.25 | 1.125 | 16 | 1.440 | 18.500 | 180.0 |
| RFB1800 | 18 | 25.00 | — | 22.75 | 1.250 | 16 | 1.563 | 21.000 | 220.0 |
| RFB2000 | 20 | 27.50 | — | 25.00 | 1.250 | 20 | 1.690 | 23.000 | 284.0 |
| RFB2200 | 22 | 29.50 | — | 27.25 | 1.375 | 20 | 1.840 | 25.250 | 360.0 |
| RFB2400 | 24 | 32.00 | — | 29.50 | 1.375 | 20 | 1.880 | 27.250 | 445.0 |
