STYLE R

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The Ring Type Joint was initially developed for high pressure/temperature applications found in the petroleum industry and is primarily used in the oil field on drilling and completion equipment. However, today this product range can also be found on valves and pipework assemblies, along with some high integrity pressure vessel joints.

Standard Style R Ring Type Joints are manufactured in accordance with both API 6A and ASME B16.20 size/ratings. Available in both oval and octagonal configurations, both types are interchangeable on the modern octagonal type grooved flanges.

DIMENSIONAL DATA – STYLE R

TOLERANCES: (INCHES)

A (width of ring) ±0.008
B, H (height of ring) ±0.020
P (average pitch diameter of ring) ±0.007
23° (angle) ±1/2°
  • MATERIALS
  • DIMENSIONS
  • DIMENSIONS IN MM
  • DIMENSIONS IN INCHES
  • Standard materials such as soft iron, Low CS and the range of SS are available as well as other materials which are available on request.

 

STANDARD MATERIALS RECOMMENDED BY THE ASME B16.20
ASME /
ASTM		 DIN EN 10 027-2 Material No. Maximum HB Maximum HV Material Code
Soft iron 1.1003 90 56 D
Low CS 1.0038 120 68 S
Low CS 1.0038 120 68 S
4-6 Cr ½ Mo 1.7362 130 72 F5
AISI 410 1.4000 170 86 S 410
AISI 304 1.4301 160 83 S 304
AISI 316 1.4401 160 83 S 316
AISI 321 1.4541 160 83 S 321
AISI 347 1.4550 160 83 S 347

 

STANDARDS FOR RING JOINT GASKETS USED WITH FLANGES
Ring Joint Gaskets Style Ring Joint Gaskets Standard Flange Standard
R ASME B 16.20 API 6A ASME B 16.5 ASME B 16.47 series A
RX ASME B 16.20 API 6A API 6B
BX API 6A API 6BX
RING NO. PRESSURE CLASS RATINGS PITCH DIAMETER OF RING WIDTH OF RING HEIGHT OF RING APPROX. DISTANCE BETWEEN MADE UP FLANGES GASKET OVAL WEIGHTS, lbs OCTAGONAL
ANSI, BS & MSS API (PSI) OVAL OCTAGONAL
150 300 / 600 900 1500 2500 2000 / 3000 5000
NOMINAL PIPE SIZE (INCHES) P A B H
R11 - 1/2 - - - - - 34.13 6.35 11.1 9.5 - .111 .104
R12 - - 1/2 1/2 - - - 39.69 7.95 14.3 12.7 - .216 .20
R13 - 3/4 - - 1/2 - - 42.86 7.95 14.3 12.7 - .234 .216
R14 - - 3/4 3/4 - - - 44.45 7.95 14.3 12.7 - .242 .224
R15 1 - - - - - - 47.63 7.95 14.3 12.7 - .260 .24
R16 - 1 1 1 3/4 - - 50.80 7.95 14.3 12.7 - .278 .256
R17 1 1/4 - - - - - - 57.15 7.95 14.3 12.7 - .311 .288
R18 - 1 1/4 1 1/4 1 1/4 1 - - 60.33 7.95 14.3 12.7 - .328 .304
R19 1 1/2 - - - - - - 65.09 7.95 14.3 12.7 - .354 .328
R20* - 1 1/2 1 1/2 1 1/2 - - - 68.28 7.95 14.3 12.7 4.1 .372 .344
R21 - - - - 1 1/4 - - 72.23 11.11 17.5 15.9 - .660 .643
R22 2 - - - - - - 82.55 7.95 14.3 12.7 - .450 .415
R23* - 2 - - 1 1/2 2 1/16•• - 82.55 11.11 17.5 15.9 4.8 .755 .734
R24* - - 2 2 - 2 1/16 2 95.25 11.11 17.5 15.9 4.8 .870 .846
R25 2 1/2 - - - - - - 101.60 7.95 14.3 12.7 - .553 .510
R26* - 2 1/2 - - 2 2 9/16 - 101.60 11.11 17.5 15.9 4.8 .930 .904
R27* - - 2 1/2 2 1/2 - (2 9/16) 2 9/16 107.95 11.11 17.5 15.9 4.8 1.050 .96
R28 - - - - 2 1/2 - - 111.13 12.70 19.1 17.5 - 1.255 1.23
R29 3 - - - - - - 114.30 7.95 14.3 12.7 - .622 .575
R30† - 3 - - - - - 117.48 11.11 17.5 15.9 - 1.075 1.047
R31* - 3 3 - - 3 1/8 - 123.83 11.11 17.5 15.9 4.8 1.130 1.10
R32 - - - - 3 - - 127.00 12.70 19.1 17.5 - 1.435 1.405
R33 3 1/2 - - - - - - 131.76 7.95 14.3 12.7 - .718 .664
R34 - 3 1/2 - - - - - 131.76 11.11 17.5 15.9 - 1.200 1.17
R35* - - - 3 - - 3 1/8 136.53 11.11 17.5 15.9 4.8 1.250 1.21
R36 4 - - - - - - 149.23 7.95 14.3 12.7 - .813 .735
R37* - 4 4 - - 4 1/16 - 149.23 11.11 17.5 15.9 4.8 1.360 1.33
R38 - - - - 4 - - 157.16 15.88 22.4 20.6 - 2.56 2.52
R39* - - - 4 - - 4 1/16 161.93 11.11 17.5 15.9 4.8 1.480 1.44
R40 5 - - - - - - 171.45 7.95 14.3 12.7 - .935 .865
R41* - 5 5 - - - - 180.98 11.11 17.5 15.9 4.8 1.66 1.61
R42 - - - - 5 - - 190.50 19.05 25.4 23.9 - 4.21 4.16
R43 6 - - - - - - 193.68 7.95 14.3 12.7 - 1.055 .975
R44* - - - 5 - - - 193.68 11.11 17.5 15.9 4.8 1.77 1.73
R45* - 6 6 - - 7 1/16 - 211.14 11.11 17.5 15.9 4.8 1.93 1.88
R46* - - - 6 - - 7 1/16 211.14 12.70 19.1 17.5 4.8 2.39 2.33
R47* - - - - 6 - - 228.60 19.05 25.4 23.9 4.1 5.06 4.99
R48 8 - - - - - - 247.65 7.95 14.3 12.7 - 1.350 1.24
R49* - 8 8 - - 9 - 269.88 11.11 17.5 15.9 4.8 2.47 2.40
R50* - - - 8 - - 9 269.88 15.88 22.4 20.6 4.1 4.40 4.32
R51 - - - - 8 - - 279.40 22.23 28.6 27.0 - 8.05 8.17
R52 10 - - - - - - 304.80 7.95 14.3 12.7 - 1.66 1.53
R53* - 10 10 - - 11 - 323.85 11.11 17.5 15.9 4.8 3.00 2.88
R54* - - - 10 - - 11 323.85 15.88 22.4 20.6 4.1 5.29 5.18
R55 - - - - 10 - - 342.90 28.58 36.5 34.9 - 16.23 17.04
R56 12 - - - - - - 381.00 7.95 14.3 12.7 - 2.07 1.92
R57* - 12 12 - - 13 5/8 - 381.00 11.11 17.5 15.9 4.8 3.48 3.38
R58 - - - 12 - - - 381.00 22.23 28.6 27.0 - 11.00 11.13
R59 14 - - - - - - 396.88 7.95 14.3 12.7 - 2.16 2.00
R60 - - - - 12 - - 406.40 31.75 39.7 38.1 - 23.10 23.50
R61 - 14 - - - - - 419.10 11.11 17.5 15.9 - 3.83 3.73
R62 - - 14 - - - - 419.10 15.88 22.2 20.6 - 6.84 6.71
R63* - - - 14 - - - 419.10 25.40 33.3 31.8 5.6 16.20 16.67
R64 16 - - - - - - 454.03 7.95 14.3 12.7 - 2.47 2.29
R65* - 16 - - - 16 3/4** - 469.90 11.11 17.5 15.9 4.8 4.30 4.18
R66* - - 16 - - (16) - 469.90 15.88 22.2 20.6 4.1 7.67 7.53
R67 - - - 16 - - - 469.90 28.58 36.5 34.9 - 22.30 23.40
R68 18 - - - - - - 517.53 7.95 14.3 12.7 - 2.82 2.60
R69* - 18 - - - - - 533.40 11.11 17.5 15.9 4.8 4.87 4.74
R70* - - 18 - - (18) - 533.40 19.05 25.4 23.9 4.8 11.80 11.64
R71 - - - 18 - - - 533.40 28.58 36.5 34.9 - 25.20 26.50
R72 20 - - - - - - 558.80 7.95 14.3 12.7 - 3.04 2.81
R73* - 20 - - - 21 1/4** - 584.20 12.7 19.1 17.5 3.3 6.60 6.47
R74* - - 20 - - (20 3/4) - 584.20 19.05 25.4 23.9 4.8 12.95 12.75
R75 - - - 20 - - - 584.20 31.75 39.7 38.1 - 33.30 35.30
R76 24 - - - - - - 673.10 7.95 14.3 12.7 - 3.66 3.38
R77 - 24 - - - - - 692.15 15.88 22.4 20.6 - 11.30 11.10
R78 - - 24 - - - - 692.15 25.4 33.3 31.8 - 27.10 27.58
R79 - - - 24 - - - 692.15 34.93 44.5 41.3 - 48.70 49.75
R80 22 - - - - - - 615.95 7.95 - 12.7 - - 3.11
R81 - 22 - - - - - 635.00 14.29 - 19.1 - - 8.55
R82* - - - - - - - 57.14 11.11 - 15.9 4.8 - .508
R84* - - - - - - - 63.50 11.11 - 15.9 4.8 - .564
R85* - - - - - - - 79.38 12.70 - 17.5 3.3 - .978
R86* - - - - - - - 90.50 15.88 - 20.6 4.1 - 1.447
R87* - - - - - - - 100.03 15.88 - 20.6 4.1 - 1.597
R88* - - - - - - - 122.83 19.05 - 23.9 4.8 - 2.735
R89* - - - - - - - 114.30 19.05 - 23.9 4.8 - 2.528
R90* - - - - - - - 155.58 22.23 - 26.9 4.8 - 4.55
R91* - - - - - - - 260.25 31.75 - 38.1 4.1 - 15.05
R92 - - - - - - - 228.60 11.11 17.5 15.9 - 2.07 2.02
R93 - 26 - 16.33 - - - 749.30 19.05 - 23.9 -    
R94 - 28 - - - - - 800.10 19.05 - 23.9 - - 17.44
R95 - 30 - - - - - 857.25 19.05 - 23.9 - - 18.69
R96 - 32 - - - - - 914.40 22.23 - 27.0 - - 26.65
R97 - 34 - - - - - 965.20 22.23 - 27.0 - - 28.13
R98 - 36 - - - - - 1022.35 22.23 - 27.0 - - 29.79
R99* - - - - - - - 234.95 11.11 - 15.9 4.8 - 2.08
R100 - - 26 - - - - 749.30 28.58 - 34.9 -    
R101 - - 28 - - - - 800.10 31.75 - 38.1 -    
R102 - - 30 - - - - 857.25 31.75 - 38.1 -    
R103 - - 32 - - - - 914.40 31.75 - 38.1 -    
R104 - - 34 - - - - 965.20 34.93 - 41.3 -    
R105 - - 36 - - - - 1022.35 34.93 - 41.3 -    
RING NO. PRESSURE CLASS RATINGS PITCH DIAMETER OF RING WIDTH OF RING HEIGHT OF RING APPROX. DISTANCE BETWEEN MADE UP FLANGES GASKET OVAL WEIGHTS, lbs OCTAGONAL
ANSI, BS & MSS API (PSI) OVAL OCTAGONAL
150 300 / 600 900 1500 2500 2000 / 3000 5000
NOMINAL PIPE SIZE (INCHES) P A B H
R11 - 1/2 - - - - - 1.344 0.250 0.44 0.38 - .111 .104
R12 - - 1/2 1/2 - - - 1.563 0.313 0.56 0.50 - .216 .20
R13 - 3/4 - - 1/2 - - 1.688 0.313 0.56 0.50 - .234 .216
R14 - - 3/4 3/4 - - - 1.750 0.313 0.56 0.50 - .242 .224
R15 1 - - - - - - 1.875 0.313 0.56 0.50 - .260 .24
R16 - 1 1 1 3/4 - - 2.000 0.313 0.56 0.50 - .278 .256
R17 1 1/4 - - - - - - 2.250 0.313 0.56 0.50 - .311 .288
R18 - 1 1/4 1 1/4 1 1/4 1 - - 2.375 0.313 0.56 0.50 - .328 .304
R19 1 1/2 - - - - - - 2.563 0.313 0.56 0.50 - .354 .328
R20* - 1 1/2 1 1/2 1 1/2 - - - 2.688 0.313 0.56 0.50 0.16 .372 .344
R21 - - - - 1 1/4 - - 2.844 0.438 0.69 0.63 - .660 .643
R22 2 - - - - - - 3.250 0.313 0.56 0.50 - .450 .415
R23* - 2 - - 1 1/2 2 1/16•• - 3.250 0.438 0.69 0.63 0.19 .755 .734
R24* - - 2 2 - 2 1/16 2 3.750 0.438 0.69 0.63 0.19 .870 .846
R25 2 1/2 - - - - - - 4.000 0.313 0.56 0.50 - .553 .510
R26* - 2 1/2 - - 2 2 9/16 - 4.000 0.438 0.69 0.63 0.19 .930 .904
R27* - - 2 1/2 2 1/2 - (2 9/16) 2 9/16 4.250 0.438 0.69 0.63 0.19 1.050 .96
R28 - - - - 2 1/2 - - 4.375 0.500 0.75 0.69 - 1.255 1.23
R29 3 - - - - - - 4.500 0.313 0.56 0.50 - .622 .575
R30† - 3 - - - - - 4.625 0.438 0.69 0.63 - 1.075 1.047
R31* - 3 3 - - 3 1/8 - 4.875 0.438 0.69 0.63 0.19 1.130 1.10
R32 - - - - 3 - - 5.000 0.500 0.75 0.69 - 1.435 1.405
R33 3 1/2 - - - - - - 5.188 0.313 0.56 0.50 - .718 .664
R34 - 3 1/2 - - - - - 5.188 0.438 0.69 0.63 - 1.200 1.17
R35* - - - 3 - - 3 1/8 5.375 0.438 0.69 0.63 0.19 1.250 1.21
R36 4 - - - - - - 5.875 0.313 0.56 0.50 - .813 .735
R37* - 4 4 - - 4 1/16 - 5.875 0.438 0.69 0.63 0.19 1.360 1.33
R38 - - - - 4 - - 6.188 0.625 0.88 0.81 - 2.56 2.52
R39* - - - 4 - - 4 1/16 6.375 0.438 0.69 0.63 0.19 1.480 1.44
R40 5 - - - - - - 6.750 0.313 0.56 0.50 - .935 .865
R41* - 5 5 - - - - 7.125 0.438 0.69 0.63 0.19 1.66 1.61
R42 - - - - 5 - - 7.500 0.750 1.00 0.94 - 4.21 4.16
R43 6 - - - - - - 7.625 0.313 0.56 0.50 - 1.055 .975
R44* - - - 5 - - - 7.625 0.438 0.69 0.63 0.19 1.77 1.73
R45* - 6 6 - - 7 1/16 - 8.313 0.438 0.69 0.63 0.19 1.93 1.88
R46* - - - 6 - - 7 1/16 8.313 0.500 0.75 0.69 0.13 2.39 2.33
R47* - - - - 6 - - 9.000 0.750 1.00 0.94 0.16 5.06 4.99
R48 8 - - - - - - 9.750 0.313 0.56 0.50 - 1.350 1.24
R49* - 8 8 - - 9 - 10.625 0.438 0.69 0.63 0.19 2.40  
R50* - - - 8 - - 9 10.625 0.625 0.88 0.81 0.16 4.40 4.32
R51 - - - - 8 - - 11.000 0.875 1.13 1.06 - 8.05 8.17
R52 10 - - - - - - 12.000 0.313 0.56 0.50 - 1.66 1.53
R53* - 10 10 - - 11 - 12.750 0.438 0.69 0.63 0.19 3.00 2.88
R54* - - - 10 - - 11 12.750 0.625 0.88 0.81 0.16 5.29 5.18
R55 - - - - 10 - - 13.500 1.125 1.44 1.38 - 16.23 17.04
R56 12 - - - - - - 15.000 0.313 0.56 0.69 - 2.07 1.92
R57* - 12 12 - - 13 5/8 - 15.000 0.438 0.69 0.63 0.19 3.48 3.38
R58 - - - 12 - - - 15.000 0.875 1.13 1.06 - 11.00 11.13
R59 14 - - - - - - 15.625 0.313 0.56 0.50 - 2.16 2.00
R60 - - - - 12 - - 16.000 1.250 1.56 1.50 - 23.10 23.50
R61 - 14 - - - - - 16.500 0.438 0.69 0.63 - 3.83 3.73
R62 - - 14 - - - - 16.500 0.625 0.88 0.81 - 6.84 6.71
R63* - - - 14 - - - 16.500 1.000 1.31 1.25 0.22 16.20 16.67
R64 16 - - - - - - 17.875 0.313 0.56 0.50 - 2.47 2.29
R65* - 16 - - - 16 3/4** - 18.500 0.438 0.69 0.63 0.19 4.30 4.18
R66* - - 16 - - (16) - 18.500 0.625 0.88 0.81 0.16 7.67 7.53
R67 - - - 16 - - - 18.500 1.125 1.44 1.38 - 22.30 23.40
R68 18 - - - - - - 20.375 0.313 0.56 0.50 - 2.82 2.60
R69* - 18 - - - - - 21.000 0.438 0.69 0.63 0.19 4.87 4.74
R70* - - 18 - - (18) - 21.000 0.750 1.00 0.94 0.19 11.80 11.64
R71 - - - 18 - - - 21.000 1.125 1.44 1.38 - 25.20 26.50
R72 20 - - - - - - 22.000 0.313 0.56 0.50 - 3.04 2.81
R73* - 20 - - - 21 1/4** - 23.000 0.500 0.75 0.69 0.13 6.60 6.47
R74* - - 20 - - (20 3/4) - 23.000 0.750 1.00 0.94 0.19 12.95 12.75
R75 - - - 20 - - - 23.000 1.250 1.56 1.50 - 33.30 35.30
R76 24 - - - - - - 26.500 0.313 0.56 0.50 - 3.66 3.38
R77 - 24 - - - - - 27.250 0.625 0.88 0.81 - 11.30 11.10
R78 - - 24 - - - - 27.250 1.000 1.31 1.25 - 27.10 27.58
R79 - - - 24 - - - 27.250 1.375 1.75 1.63 0.19 48.70 49.75
R80 22 - - - - - - 24.250 0.313 - 0.50 - - 3.11
R81 - 22 - - - - - 25.000 0.563 - 0.75 - - 8.55
R82* - - - - - - - 2.250 0.438 - 0.63 0.19 - .508
R84* - - - - - - - 2.500 0.438 - 0.63 0.19 - .564
R85* - - - - - - - 3.125 0.500 - 0.69 0.13 - .978
R86* - - - - - - - 3.563 0.625 - 0.81 0.16 - 1.447
R87* - - - - - - - 3.938 0.625 - 0.81 0.16 - 1.597
R88* - - - - - - - 4.875 0.750 - 0.94 0.19 - 2.735
R89* - - - - - - - 4.500 0.750 - 0.94 0.19 - 2.528
R90* - - - - - - - 6.125 0.875 - 1.06 0.19 - 4.55
R91* - - - - - - - 10.250 1.250 - 1.50 0.16 - 15.05
R92 - - - - - - - 9.000 0.438 0.69 0.63 - 2.07 2.02
R93 - 26 - 16.3-3 - - - 29.500 0.750 - 0.94 -    
R94 - 28 - - - - - 31.500 0.750 - 0.94 - - 17.44
R95 - 30 - - - - - 33.750 0.750 - 0.94 - - 18.69
R96 - 32 - - - - - 36.000 0.875 - 1.06 - - 26.65
R97 - 34 - - - - - 38.000 0.875 - 1.06 - - 28.13
R98 - 36 - - - - - 40.250 0.875 - 1.06 - - 29.79
R99* - - - - - - - 9.250 0.438 - 0.63 0.19 - 2.08
R100 - - 26 - - - - 29.500 1.125 - 1.38 -    
R101 - - 28 - - - - 31.500 1.250 - 1.50 -    
R102 - - 30 - - - - 33.750 1.250 - 1.50 -    
R103 - - 32 - - - - 36.000 1.250 - 1.50 -    
R104 - - 34 - - - - 38.000 1.375 - 1.63 -    
R105 - - 36 - - - - 40.250 1.375 - 1.63 -