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Class 150 Forged Steel Raised Face Blind Flanges are stronger than cast flanges and are rated for use in high pressure or high temperature applications. These blind flanges comply with ANSI B16.5 and ASTM A-105 standards.
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| 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 |
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