RX Type Gasket
Style RX type RTJ gaskets are manufactured in accordance with both API 6A and ASME B16.20 to suit API 6B and ASME/ANSI B16.5 flanges.
Style RX is a pressure-energized adaptation of the standard Style R gasket. The RX is designed to fit the same groove design as a standard Style R, making the joints interchangeable. The modified design uses a pressure-energized effect that improves the efficiency of the seal as the internal pressure of the system increases.
Pressure: 2,000-5,000 PSI
TOLERANCES:(mm)
A*(width of ring)
nbsp; +0.20,-0.000
H*(height of ring)
nbsp; +0.20,-0.000
OD(od of ring)
+0.5,-0.000
23*(angle)
±1/2°
*A plus tolerance of 0.008 inches for width
“A” and height “H” is permitted, provided the variation in width or height does not exceed 0.004 inches throughout its entire circumference.
NOTE 1:
The pressure passage hole illustrated in the Ring Type Joint cross section ensures equalisation of pressure which may be trapped in the
grooves, it is in ring RX82 through RX91 only. Centre line of hole shall be located at mid point of dimension”c”(width flat).Hole diameter shall be as
| RINGNO. | PRESSLURE ALASSES, API 6B | PITCHDLAMETEROF RINGP | OUTSIDEDLAMETEROF RING0D | WIDTHOFRINGA | HELCHTOFRINGH | WEIGHTIbs. | |||
| 720-960and2000[Note(1)] | 2900[Note(1)] | 3000 | 5000 | ||||||
| Rx20 | 1 1／2 | – | 1 1／2 | 1 1／2 | 68.26 | 76.20 | 8.73 | 19.05 | 0.527 |
| Rx23 | 2 | – | – | – | 82.55 | 93.27 | 11.91 | 25.40 | 1.15 |
| Rx24 | – | – | 2 | 2 | 95.25 | 105.97 | 11.91 | 25.40 | 1.33 |
| Rx25 | – | – | – | 3 1／8 | 101.60 | 109.54 | 8.73 | 19.05 | 1.42 |
| Rx26 | 2 1／2 | – | – | – | 101.60 | 111.92 | 11.91 | 25.40 | 1.50 |
| Rx27 | – | – | 2 1／2 | 2 1／2 | 107.95 | 118.27 | 11.91 | 25.40 | 1.73 |
| Rx31 | 3 | – | 3 | – | 123.83 | 134.54 | 11.91 | 25.40 | 1.91 |
| Rx35 | – | – | – | 3 | 136.53 | 147.24 | 11.91 | 25.40 | 2.09 |
| Rx37 | 4 | – | 4 | – | 149.23 | 159.94 | 11.91 | 25.40 | 2.27 |
| Rx39 | – | – | – | 4 | 161.93 | 172.64 | 11.91 | 25.40 | 2.54 |
| Rx41 | 5 | – | 5 | – | 180.98 | 191.69 | 11.91 | 25.40 | 2.72 |
| Rx44 | – | – | – | 5 | 193.68 | 204.39 | 11.91 | 25.40 | 2.96 |
| Rx45 | 6 | – | 6 | – | 211.14 | 281.85 | 11.91 | 25.40 | 3.66 |
| Rx46 | – | – | – | 6 | 211.14 | 222.25 | 13.49 | 28.58 | 8.56 |
| Rx47 | – | – | – | 8(2) | 228.60 | 245.27 | 19.84 | 41.28 | 3.79 |
| Rx49 | 8 | – | 8 | – | 269.88 | 280.59 | 11.91 | 25.40 | 5.36 |
| Rx50 | – | – | – | 8 | 269.88 | 283.37 | 16.67 | 31.75 | 4.56 |
| Rx53 | 10 | – | 10 | – | 323.85 | 334.57 | 11.91 | 25.40 | 6.45 |
| Rx54 | – | – | – | 10 | 323.85 | 337.34 | 16.67 | 31.75 | 5.36 |
| Rx57 | 12 | – | 12 | – | 381.00 | 391.72 | 11.91 | 25.40 | 26.40 |
| Rx63 | – | – | – | 14 | 419.10 | 441.72 | 26.99 | 50.80 | 6.63 |
| Rx65 | 16 | – | – | – | 469.90 | 480.62 | 11.91 | 25.40 | 9.39 |
| Rx66 | – | – | 16 | – | 469.90 | 483.39 | 16.67 | 31.75 | 7.52 |
| Rx69 | 18 | – | – | – | 533.40 | 544.12 | 11.91 | 25.40 | 20.14 |
| Rx70 | – | – | 18 | – | 533.40 | 550.07 | 19.84 | 41.28 | 11.63 |
| Rx73 | 20 | – | – | – | 584.20 | 596.11 | 13.49 | 31.75 | 22.10 |
| Rx74 | – | – | 20 | – | 584.20 | 600.87 | 19.84 | 41.28 | 0.790 |
| Rx82 | – | 1 | – | – | 57.15 | 67.87 | 11.91 | 25.40 | 0.880 |
| Rx84 | – | 1 1／2 | – | – | 63.50 | 74.22 | 11.91 | 25.40 | 0.880 |
| Rx85 | – | 2 | – | – | 79.38 | 90.09 | 13.49 | 25.40 | 1.79 |
| Rx86 | – | 2 1／2 | – | – | 90.49 | 103.58 | 15.08 | 28.58 | 1.98 |
| Rx87 | – | 3 | – | – | 100.03 | 113.11 | 15.08 | 28.58 | 3.22 |
| Rx88 | – | 4 | – | – | 123.83 | 139.29 | 17.46 | 31.75 | 2.98 |
| Rx89 | – | 3 1／2 | – | – | 114.30 | 129.78 | 18.26 | 31.75 | 6.82 |
| Rx90 | – | 5 | – | – | 155.58 | 174.63 | 19.84 | 44.45 | 17.10 |
| Rx91 | – | 10 | – | – | 260.35 | 286.94 | 30.18 | 45.24 | 3.31 |
| Rx99 | 8(2) | – | 8(2) | – | 234.95 | 245.67 | 11.91 | 25.40 | – |
| Rx201 | – | – | – | 1 3／8 | 46.04 | 51.46 | 5.74 | 11.30 | – |
| Rx205 | – | – | – | 1 13／16 | 57.15 | 62.31 | 5.56 | 11.10 | – |
| Rx210 | – | – | – | 2 9／16 | 88.90 | 97.63 | 9.53 | 19.05 | – |
| RX215 | – | – | – | 4 1／16 | 130.18 | 140.89 | 11.91 | 25.40 | – |
NOTES:
(1) Class 720, 960, and 2900 flanges to API 6B are obsolete. Data are for information only.
(2) Crossover flange connection.
(3) Rings RX-82 through RX-91 only require one pressure passage hole as illustrated.
The centerline of the hole shall be located at the mid-oint of dimension C.