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STYLE R

R ring joint gaskets are manufactured to the specifications of both API 6A and ASME B16.20. They are manufactured in both oval and octagonal configurations which are interchangeable on modern flange grooves.

R Ring Joint gaskets can be manufactured in accordance with all relevant standards to suit the following flange designations:

API 6A
ASME / ANSI B16.5
MSS SP44 ( ASME 16.47 SERIES A )
BS 1560

Tolerances: (Inches)

A* Width of Ring +/- 0.008
B, Height of Ring +/- 0.020
P (Average Pitch Diameter of Ring ) +/- 0.007
23° (Angle) +/- 1/2°

Oval

 

Note: When Ordering, please specify Ring No. ( or Nominal Size / Pressure Class ) and Material.

( * ) Denotes ring number specified in API 6A.

Nominal Pipe Sizes marked ( ** ) apply to class rating 2000 only.
Nominal Pipe Sizes in brackets apply to class rating 3000 only.


Ring No. Pressure Class Ratings Pitch Diameter of Ring Width of Ring Height of Ring Approx. Distance between Made Up Flanges Gasket Weights, lbs.
ANSI, BS & MSS API (psi)
150 300/600 900 1500 2500 2000/3000 5000 Oval Octagonal Oval Octagonal
Nominal Pipe Size P A B H
R11 1/2 1.344 0.250 0.44 0.38 0.111 0.104
R12 1/2 1/2 1.563 0.313 0.56 0.50 0.216 0.200
R13 3/4 1/2 1.688 0.313 0.56 0.50 0.234 0.216
R14 3/4 3/4 1.750 0.313 0.56 0.50 0.242 0.224
R15 1 1.875 0.313 0.56 0.50 0.260 0.240
R16 1 1 1 3/4 2.000 0.313 0.56 0.50 0.278 0.256
R17 1 1/4 2.250 0.313 0.56 0.50 0.311 0.288
R18 1 1/4 1 1/4 1 1/4 1 2.375 0.313 0.56 0.50 0.328 0.304
R19 1 1/2 2.563 0.313 0.56 0.50 0.354 0.328
R20* 1 1/2 1 1/2 1 1/2 2.688 0.313 0.56 0.50 0.16 0.372 0.344
R21 1 1/4 2.844 0.438 0.69 0.63 0.660 0.643
R22 2 3.250 0.313 0.56 0.50 0.450 0.415
R23* 2 1 1/2 2 1/16•• 3.250 0.438 0.69 0.63 0.19 0.755 0.734
R24* 2 2 2 1/16 2 3.750 0.438 0.69 0.63 0.19 0.870 0.846
R25 2 1/2 4.000 0.313 0.56 0.50 0.553 0.510
R26* 2 1/2 2 2 9/16 4.000 0.438 0.69 0.63 0.19 0.930 0.904
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 0.960
R28 2 1/2 4.375 0.500 0.75 0.69 1.255 1.230
R29 3 4.500 0.313 0.56 0.50 0.622 0.575
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 1.100
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 0.718 0.664
R34 3 1/2 5.188 0.438 0.69 0.63 1.200 1.170
R35* 3 3 1/8 5.375 0.438 0.69 0.63 0.19 1.250 1.210
R36 4 5.875 0.313 0.56 0.50 0.813 0.735
R37* 4 4 4 1/16 5.875 0.438 0.69 0.63 0.19 1.360 1.330
R38 4 6.188 0.625 0.88 0.81 2.560 2.520
R39* 4 4 1/16 6.375 0.438 0.69 0.63 0.19 1.480 1.440
R40 5 6.750 0.313 0.56 0.50 0.935 0.865
R41* 5 5 7.125 0.438 0.69 0.63 0.19 1.660 1.610
R42 5 7.500 0.750 1.00 0.94 4.210 4.160
R43 6 7.625 0.313 0.56 0.50 1.055 0.975
R44* 5 7.625 0.438 0.69 0.63 0.19 1.770 1.730
R45* 6 6 7 1/16 8.313 0.438 0.69 0.63 0.19 1.930 1.880
R46* 6 7 1/16 8.313 0.500 0.75 0.69 0.13 2.390 2.330
R47* 6 9.000 0.750 1.00 0.94 0.16 5.060 4.990
R48 8 9.750 0.313 0.56 0.50 1.350 1.240
R49* 8 8 9 10.625 0.438 0.69 0.63 0.19 2.400 2.340
R50* 8 9 10.625 0.625 0.88 0.81 0.16 4.400 4.320
R51 8 11.000 0.875 1.13 1.06 8.050 8.170
R52 10 12.000 0.313 0.56 0.50 1.660 1.530
R53* 10 10 11 12.750 0.438 0.69 0.63 0.19 3.000 2.880
R54* 10 11 12.750 0.625 0.88 0.81 0.16 5.290 5.180
R55 10 13.500 1.125 1.44 1.38 16.230 17.040
R56 12 15.000 0.313 0.56 0.69 2.070 1.920
R57* 12 12 13 5/8 15.000 0.438 0.69 0.63 0.19 3.480 3.380
R58 12 15.000 0.875 1.13 1.06 11.000 11.130
R59 14 15.625 0.313 0.56 0.50 2.160 2.000
R60 12 16.000 1.250 1.56 1.50 23.100 23.500
R61 14 16.500 0.438 0.69 0.63 3.830 3.730
R62 14 16.500 0.625 0.88 0.81 6.840 6.710
R63* 14 16.500 1.000 1.31 1.25 0.22 16.200 16.670
R64 16 17.875 0.313 0.56 0.50 2.470 2.290
R65* 16 16 3/4** 18.500 0.438 0.69 0.63 0.19 4.300 4.180
R66* 16 (16) 18.500 0.625 0.88 0.81 0.16 7.670 7.530
R67 16 18.500 1.125 1.44 1.38 22.300 23.400
R68 18 20.375 0.313 0.56 0.50 2.820 2.600
R69* 18 21.000 0.438 0.69 0.63 0.19 4.870 4.740
R70* 18 (18) 21.000 0.750 1.00 0.94 0.19 11.800 11.640
R71 18 21.000 1.125 1.44 1.38 25.200 26.500
R72 20 22.000 0.313 0.56 0.50 3.040 2.810
R73* 20 21 1/4** 23.000 0.500 0.75 0.69 0.13 6.600 6.470
R74* 20 (20 3/4) 23.000 0.750 1.00 0.94 0.19 12.950 12.750
R75 20 23.000 1.250 1.56 1.50 33.300 35.300
R76 24 26.500 0.313 0.56 0.50 3.660 3.380
R77 24 27.250 0.625 0.88 0.81 11.300 11.100
R78 24 27.250 1.000 1.31 1.25 27.100 27.580
R79 24 27.250 1.375 1.75 1.63 0.19 48.700 49.750
R80 22 24.250 0.313 0.50 3.110
R81 22 25.000 0.563 0.75 8.550
R82* 2.250 0.438 0.63 0.19 0.508
R84* 2.500 0.438 0.63 0.19 0.564
R85* 3.125 0.500 0.69 0.13 0.978
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 4.550
R91* 10.250 1.250 1.50 0.16 15.050
R92 9.000 0.438 0.69 0.63 2.070 2.020
R93 26 29.500 0.750 0.94 16.330
R94 28 31.500 0.750 0.94 17.440
R95 30 33.750 0.750 0.94 18.690
R96 32 36.000 0.875 1.06 26.650
R97 34 38.000 0.875 1.06 28.130
R98 36 40.250 0.875 1.06 29.790
R99* 9.250 0.438 0.63 0.19 2.080
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