Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal.
This jointing method can be employed on Weld Neck, Slip-on and Blind Flange.
Stainless steel: A182 F304/F304L/F316/F316L/F321
Alloy steel: F11, F12
Packing: plywood case and plywood pallet
This jointing method can be employed on Weld Neck, Slip-on and Blind Flange.
Dimensions Ring Joint Facings
| Nominal Size | Groove Dimensions | Diameter of Raised Portion, K | ||||||||||||||
| Class 150 NPS | Class 300 NPS | Class 400 NPS | Class 600 NPS | Class 900 NPS | Class 1500 NPS | Class 2500 NPS | Groove Number | Pitch Diameter, P | Depth, E | Width, F | Radius at Bottom, R | Class 150 NPS | Class 300, 600 NPS | Class 900 NPS | Class 1500 NPS | Class 2500 NPS |
| _ | 1/2 | _ | 1/2 | _ | _ | _ | R11 | 34.14 | 5.54 | 7.14 | 0.8 | 51.0 | ||||
| _ | _ | _ | _ | _ | 1/2 | _ | R12 | 39.67 | 6.35 | 8.74 | 0.8 | 60.5 | ||||
| _ | 3/4 | _ | 3/4 | _ | _ | 1/2 | R13 | 42.88 | 6.35 | 8.74 | 0.8 | 63.5 | 65.0 | |||
| _ | _ | _ | _ | _ | 3/4 | _ | R14 | 44.45 | 6.35 | 8.74 | 0.8 | 66.5 | ||||
| 1 | _ | _ | _ | _ | _ | _ | R15 | 47.63 | 6.35 | 8.74 | 0.8 | 63.5 | ||||
| 1 | _ | 1 | _ | 1 | 3/4 | R16 | 50.80 | 6.35 | 8.74 | 0.8 | 70.0 | 71.5 | 73.0 | |||
| 1 1/4 | _ | _ | _ | _ | _ | _ | R17 | 57.15 | 6.35 | 8.74 | 0.8 | 73.0 | ||||
| 1 1/4 | _ | 1 1/4 | _ | 1 1/4 | 1 | R18 | 60.33 | 6.35 | 8.74 | 0.8 | 79.5 | 81.0 | 82.5 | |||
| 1 1/2 | _ | _ | _ | _ | _ | _ | R19 | 65.07 | 6.35 | 8.74 | 0.8 | 82.5 | ||||
| _ | 1 1/2 | _ | 1 1/2 | _ | 1 1/2 | _ | R20 | 68.27 | 6.35 | 8.74 | 0.8 | 90.5 | 92.0 | |||
| _ | _ | _ | _ | _ | _ | 1 1/4 | R21 | 72.23 | 7.92 | 11.91 | 0.8 | 102.0 | ||||
| 2 | _ | _ | _ | _ | _ | _ | R22 | 82.55 | 6.35 | 8.74 | 0.8 | 102.0 | ||||
| _ | 2 | _ | 2 | _ | _ | 1 1/2 | R23 | 82.55 | 7.92 | 11.91 | 0.8 | 108.0 | 114.0 | |||
| _ | _ | _ | _ | _ | 2 | _ | R24 | 95.25 | 7.92 | 11.91 | 0.8 | 124.0 | ||||
| 2 1/2 | _ | _ | _ | _ | _ | _ | R25 | 101.60 | 6.35 | 8.74 | 0.8 | 121.0 | ||||
| _ | 2 1/2 | _ | 2 1/2 | _ | _ | 2 | R26 | 101.60 | 7.92 | 11.91 | 0.8 | 127.0 | 133.0 | |||
| _ | _ | _ | _ | _ | 2 1/2 | _ | R27 | 107.95 | 7.92 | 11.91 | 0.8 | 137.0 | ||||
| _ | _ | _ | _ | _ | _ | 2 1/2 | R28 | 111.13 | 9.53 | 13.49 | 0.8 | 149.0 | ||||
| 3 | _ | _ | _ | _ | _ | _ | R29 | 114.30 | 6.35 | 8.74 | 0.8 | 133.0 | ||||
| _ | (2) | _ | (2) | _ | _ | _ | R30 | 117.48 | 7.92 | 11.91 | 0.8 | |||||
| _ | 3 (2) | _ | 3 (2) | 3 | _ | _ | R31 | 123.83 | 7.92 | 11.91 | 0.8 | 146.0 | 156.0 | |||
| _ | _ | _ | _ | _ | _ | 3 | R32 | 127.00 | 9.53 | 13.49 | 1.5 | 168.0 | ||||
| 3 1/2 | _ | _ | _ | _ | _ | _ | R33 | 131.78 | 6.35 | 8.74 | 0.8 | 154.0 | ||||
| _ | 3 1/2 | _ | 3 1/2 | _ | _ | _ | R34 | 131.78 | 7.92 | 11.91 | 0.8 | 159.0 | ||||
| _ | _ | _ | _ | _ | 3 | _ | R35 | 136.53 | 7.92 | 11.91 | 0.8 | 168.0 | ||||
| 4 | _ | _ | _ | _ | _ | _ | R36 | 149.23 | 6.35 | 8.74 | 0.8 | 171.0 | ||||
| _ | 4 | 4 | 4 | 4 | _ | _ | R37 | 149.23 | 7.92 | 11.91 | 0.8 | 175.0 | 181.0 | |||
| _ | _ | _ | _ | _ | _ | 4 | R38 | 157.18 | 11.13 | 16.66 | 1.5 | 203.0 | ||||
| _ | _ | _ | _ | _ | 4 | _ | R39 | 161.93 | 7.92 | 11.91 | 0.8 | 194.0 | ||||
| 5 | _ | _ | _ | _ | _ | _ | R40 | 171.45 | 6.35 | 8.74 | 0.8 | 194.0 | ||||
| _ | 5 | 5 | 5 | 5 | _ | _ | R41 | 180.98 | 7.92 | 11.91 | 0.8 | 210.0 | 216.0 | |||
| _ | _ | _ | _ | _ | _ | 5 | R42 | 190.50 | 12.70 | 19.84 | 1.5 | 241.0 | ||||
| 6 | _ | _ | _ | _ | _ | _ | R43 | 193.68 | 6.35 | 8.74 | 0.8 | 219.0 | ||||
| _ | _ | _ | _ | _ | 5 | _ | R44 | 193.68 | 7.92 | 11.91 | 0.8 | 229.0 | ||||
| _ | 6 | 6 | 6 | 6 | _ | _ | R45 | 211.12 | 7.92 | 11.91 | 0.8 | 241.0 | 241.0 | |||
| _ | _ | _ | _ | _ | 6 | _ | R46 | 211.14 | 9.53 | 13.49 | 1.5 | 248.0 | ||||
| _ | _ | _ | _ | _ | _ | 6 | R47 | 228.60 | 12.70 | 19.84 | 1.5 | 279.0 | ||||
| 8 | _ | _ | _ | _ | _ | _ | R48 | 247.65 | 6.35 | 8.74 | 0.8 | 273.0 | ||||
| _ | 8 | 8 | 8 | 8 | _ | _ | R49 | 269.88 | 7.92 | 11.91 | 0.8 | 302.0 | 308.0 | |||
| _ | _ | _ | _ | _ | 8 | _ | R50 | 269.88 | 11.13 | 16.66 | 1.5 | _ | _ | 318.0 | _ | |
| _ | _ | _ | _ | _ | _ | 8 | R51 | 279.40 | 14.27 | 23.01 | 1.5 | _ | _ | _ | 340.0 | |
| 10 | _ | _ | _ | _ | _ | _ | R52 | 304.80 | 6.35 | 8.74 | 0.8 | 330.0 | _ | _ | _ | _ |
| _ | 10 | 10 | 10 | 10 | _ | _ | R53 | 323.85 | 7.92 | 11.91 | 0.8 | 356.0 | 362.0 | _ | _ | |
| _ | _ | _ | _ | _ | 10 | _ | R54 | 323.85 | 11.13 | 16.66 | 1.5 | _ | _ | 371.0 | _ | |
| _ | _ | _ | _ | _ | _ | 10 | R55 | 342.90 | 17.48 | 30.18 | 2.4 | _ | _ | _ | 425.0 | |
| 12 | _ | _ | _ | _ | _ | _ | R56 | 381.00 | 6.35 | 8.74 | 0.8 | 406.0 | _ | _ | _ | _ |
| _ | 12 | 12 | 12 | 12 | _ | _ | R57 | 381.00 | 7.92 | 11.91 | 0.8 | 413.0 | 429.0 | _ | _ | |
| _ | _ | _ | _ | _ | 12 | _ | R58 | 381.00 | 14.27 | 23.01 | 1.5 | _ | _ | 438.0 | _ | |
| 14 | _ | _ | _ | _ | _ | _ | R59 | 396.88 | 6.35 | 8.74 | 0.8 | 425.0 | _ | _ | _ | _ |
| _ | _ | _ | _ | _ | _ | 12 | R60 | 406.40 | 17.48 | 33.32 | 2.4 | _ | _ | _ | 495.0 | |
| _ | 14 | 14 | 14 | _ | _ | _ | R61 | 419.10 | 7.92 | 11.91 | 0.8 | 457.0 | _ | _ | _ | |
| _ | _ | _ | _ | 14 | _ | _ | R62 | 419.10 | 11.13 | 16.66 | 1.5 | _ | 467.0 | _ | _ | |
| _ | _ | _ | _ | _ | 14 | _ | R63 | 419.10 | 15.88 | 26.97 | 2.4 | _ | _ | 489.0 | _ | |
| 16 | _ | _ | _ | _ | _ | _ | R64 | 454.03 | 6.35 | 8.74 | 0.8 | 483.0 | _ | _ | _ | _ |
| _ | 16 | 16 | 16 | _ | _ | _ | R65 | 469.90 | 7.92 | 11.19 | 0.8 | 508.0 | _ | _ | _ | |
| _ | _ | _ | _ | 16 | _ | _ | R66 | 469.90 | 11.13 | 16.66 | 1.5 | _ | 524.0 | _ | _ | |
| _ | _ | _ | _ | _ | 16 | _ | R67 | 469.90 | 17.48 | 30.18 | 2.4 | _ | _ | 546.0 | _ | |
| 18 | _ | _ | _ | _ | _ | _ | R68 | 517.53 | 6.35 | 8.74 | 0.8 | 546.0 | _ | _ | _ | _ |
| _ | 18 | 18 | 18 | _ | _ | _ | R69 | 533.40 | 7.92 | 11.91 | 0.8 | 575.0 | _ | _ | _ | |
| _ | _ | _ | _ | 18 | _ | _ | R70 | 533.40 | 12.70 | 19.84 | 1.5 | _ | 594.0 | _ | _ | |
| _ | _ | _ | _ | _ | 18 | _ | R71 | 533.40 | 17.48 | 30.18 | 2.4 | _ | _ | 613.0 | _ | |
| 20 | _ | _ | _ | _ | _ | _ | R72 | 558.80 | 6.35 | 8.74 | 0.8 | 597.0 | _ | _ | _ | _ |
| _ | 20 | 20 | 20 | _ | _ | _ | R73 | 584.20 | 9.53 | 13.49 | 1.5 | 635.0 | _ | _ | _ | |
| _ | _ | _ | _ | 20 | _ | _ | R74 | 584.20 | 12.70 | 19.84 | 1.5 | _ | 648.0 | _ | _ | |
| _ | _ | _ | _ | _ | 20 | _ | R75 | 584.20 | 17.48 | 33.32 | 2.4 | _ | _ | 673.0 | _ | |
| 24 | _ | _ | _ | _ | _ | _ | R76 | 673.10 | 6.35 | 8.74 | 0.8 | 711.0 | _ | _ | _ | _ |
| _ | 24 | 24 | 24 | _ | _ | _ | R77 | 692.15 | 11.13 | 16.66 | 1.5 | 749.0 | _ | _ | _ | |
| _ | _ | _ | _ | 24 | _ | _ | R78 | 692.15 | 15.88 | 26.97 | 2.4 | _ | 772.0 | _ | _ | |
| _ | _ | _ | _ | _ | 24 | _ | R79 | 692.15 | 20.62 | 36.53 | 2.4 | _ | _ | 794.0 | _ | |
| _ | 26 | 26 | 26 | _ | _ | _ | R93 | 749.30 | 12.70 | 19.84 | 1.5 | 810.0 | ||||
| _ | 28 | 28 | 28 | _ | _ | _ | R94 | 800.10 | 12.70 | 19.84 | 1.5 | 861.0 | ||||
| _ | 30 | 30 | 30 | _ | _ | _ | R95 | 857.25 | 12.70 | 19.84 | 1.5 | 917.0 | ||||
| _ | 32 | 32 | 32 | _ | _ | _ | R96 | 914.40 | 14.27 | 23.01 | 1.5 | 984.0 | ||||
| _ | 34 | 34 | 34 | _ | _ | _ | R97 | 965.20 | 14.27 | 23.01 | 1.5 | 1035.0 | ||||
| _ | 36 | 36 | 36 | _ | _ | _ | R98 | 1022.35 | 14.27 | 23.01 | 1.5 | 1092.0 | ||||
| _ | _ | _ | _ | 26 | _ | _ | R100 | 749.30 | 17.48 | 30.18 | 2.3 | 832.0 | ||||
| _ | _ | _ | _ | 28 | _ | _ | R101 | 800.10 | 17.48 | 33.32 | 2.3 | 889.0 | ||||
| _ | _ | _ | _ | 30 | _ | _ | R102 | 857.25 | 17.48 | 33.32 | 2.3 | 946.0 | ||||
| _ | _ | _ | _ | 32 | _ | _ | R103 | 914.40 | 17.48 | 33.32 | 2.3 | 1003.0 | ||||
| _ | _ | _ | _ | 34 | _ | _ | R104 | 965.20 | 20.62 | 36.53 | 2.3 | 1067.0 | ||||
| _ | _ | _ | _ | 36 | _ | _ | R105 | 1022.35 | 20.62 | 36.53 | 2.3 | 1124.0 | ||||
An RTJ flange may have a raised face with a ring groove machined into it. This raised face does not serve as any part of the sealing means.
Standards, Dimensions & Weight
RTJ flanges have grooves cut into their faces which accept steel Ring Gaskets.- Dimensions of Ring Joint Facings
- Ring Joint Facings ASME/ANSI B16.5 & B16.47-1
- Ring Joint Facings ASME/ANSI B16.5 & B16.47-2
- Ring Joint Facings ASME/ANSI B16.5 & B16.47-3
- Ring Joint Facings ASME/ANSI B16.5 & B16.47-4
RTJ flanges seal when tightened bolts compress the gasket between the flanges into the grooves, deforming (or “Coining”) the gasket to make Intimate Contact inside the grooves, creating a metal to metal seal.
Ring Type Joint gaskets
Ring Type Joint gaskets are metallic sealing rings, suitable for high-pressure and high-temperature applications. They are always applied to special, accompanying flanges which ensure good, reliable sealing with the correct choice of profiles and material.
Specifications of Ring Type Joint Flange:
An RTJ flange may have a raised face with a ring groove machined into it. This raised face does not serve as any part of the sealing means. For RTJ flanges that seal with BX ring gaskets, the raised faces of the connected and tightened flanges may contact each other.
In this case the already coined gasket will not bear additional load beyond the bolt tension, vibration and movement cannot further crush the gasket and lessen the connecting tension.
Size: 1/2” to 60”, DN 12mm to DN 1500mm
Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250
Facing: RF / RTJ>
Size: 1/2” to 60”, DN 12mm to DN 1500mm
Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250
Facing: RF / RTJ>
Material:
Cabon steel: A105, A350 LF2Stainless steel: A182 F304/F304L/F316/F316L/F321
Alloy steel: F11, F12
Packing: plywood case and plywood pallet
