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a ring type joint flange(rtj) is a machined metallic ring with a deep groove cut into its face. this groove rests a metal ring which gets compressed when the connecting bolts of the flange are tightened. this compression results in a leak-proof, close-fitting seal on the pipe or connection. stainless steel ring type joint flanges are classically used in high-pressure and high-temperature services, while carbon steel ring type joint flanges are spill-proof.
dn | nps | groove number | d (min) | p | e | f | r (max) |
15 | 1/2 | r12 | 60.5 | 39.67 | 6.35 | 8.74 | 0.8 |
20 | 3/4 | r14 | 66.5 | 44.45 | 6.35 | 8.74 | 0.8 |
25 | 1 | r16 | 71.5 | 50.8 | 6.35 | 8.74 | 0.8 |
32 | 1 ¼ | r18 | 81 | 60.33 | 6.35 | 8.74 | 0.8 |
40 | 1 ½ | r20 | 92 | 68.27 | 6.35 | 8.74 | 0.8 |
50 | 2 | r24 | 124 | 95.25 | 7.92 | 11.91 | 0.8 |
65 | 2 ½ | r37 | 137 | 107.95 | 7.92 | 11.91 | 0.8 |
80 | 3 | r31 | 156 | 123.83 | 7.92 | 11.91 | 0.8 |
100 | 3 ½ | r37 | 181 | 149.23 | 7.92 | 11.91 | 0.8 |
125 | 5 | r41 | 216 | 180.98 | 7.92 | 11.91 | 0.8 |
150 | 6 | r45 | 241 | 211.12 | 7.92 | 11.91 | 0.8 |
200 | 8 | r49 |
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