Dimensions & Tolerances Type R Ring Gaskets ASME B16.20 to be used with RTJ flanges ASME B16.5 & B16.47 series A



 
ASME B16.5
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 1134.146.3511.29.74.321.51/2
300 600
R 1239.77.9514.212.75.231.51/2
900 1500
R 1342.887.9514.212.75.231.53/4
300 600
1/2
2500
R 1444.457.9514.212.75.231.53/4
900 1500
R 1547.637.9514.212.75.231.51
150
R 1650.87.9514.212.75.231.51
300 1500
3/4
2500
R 1757.157.9514.212.75.231.5
150
R 1860.337.9514.212.75.231.5
300 1500
1
2500
R 1965.17.9514.212.75.231.5
150
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 2068.287.9514.212.75.231.5
300 1500
R 2172.2411.1317.5167.751.5
2500
R 2282.557.9514.212.75.231.52
150
R 2382.5511.1317.5167.751.52
300 600

2500
R 2495.2511.1317.5167.751.52
900 1500
R 25101.67.9514.212.75.231.5
150
R 26101.611.1317.5167.751.5
300 600
2
2500
R 27107.9511.1317.5167.751.5
900 1500
R 28111.1312.719.117.58.661.5
2500
R 29114.37.9514.212.75.231.53
150
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 30
*
117.4811.1317.5167.751.53
300 600
R 31123.8311.1317.5167.751.53
300 900
R 3212712.719.117.58.661.53
2500
R 33131.787.9514.212.75.231.5
150
R 34131.7811.1317.5167.751.5
300 600
R 35136.5311.1317.5167.751.53
1500
R 36149.237.9514.212.75.231.54
150
R 37149.2311.1317.5167.751.54
300 900
R 38157.1815.8822.420.610.491.54
2500
R 39161.9311.1317.5167.751.54
1500
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 40171.457.9514.212.75.231.55
150
R 41180.9811.1317.5167.751.55
300 900
R 42190.519.0525.423.912.321.55
2500
R 43193.687.9514.212.75.231.56
150
R 44193.6811.1317.5167.751.55
1500
R 45211.1511.1317.5167.751.56
300 900
R 46211.1512.719.117.58.661.56
1500
R 47228.619.0525.423.912.321.56
2500
R 48247.657.9514.212.75.231.58
150
R 49269.8811.1317.5167.751.58
300 900
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 50269.8815.8822.420.610.491.58
1500
R 51279.422.2328.726.914.811.58
2500
R 52304.87.9514.212.75.231.510
150
R 53323.8511.1317.5167.751.510
300 900
R 54323.8515.8822.420.610.491.510
1500
R 55342.928.5836.635.119.812.310
2500
R 563817.9514.212.75.231.512
150
R 5738111.1317.5167.751.512
300 900
R 5838122.2328.726.914.811.512
1500
R 59396.887.9514.212.75.231.514
150
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 60406.431.7539.638.122.332.312
2500
R 61419.111.1317.5167.751.514
300 600
R 62419.115.8822.420.610.491.514
900
R 63419.125.433.331.817.32.314
1500
R 64454.037.9514.212.75.231.516
150
R 65469.911.1317.5167.751.516
300 600
R 66469.915.8822.420.610.491.516
900
R 67469.928.5836.635.119.812.316
1500
R 68517.537.9514.212.75.231.518
150
R 69533.411.1317.5167.751.518
300 600
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 70533.419.0525.423.912.321.518
900
R 71533.428.5836.635.119.812.318
1500
R 72558.87.9514.212.75.231.520
150
R 73584.212.719.117.58.661.520
300 600
R 74584.219.0525.423.912.321.520
900
R 75584.231.7539.638.122.332.320
1500
R 76673.17.9514.212.75.231.524
150
R 77692.1515.8822.420.610.491.524
300 600
R 78692.1525.433.331.817.32.324
900
R 79692.1534.9344.541.424.822.324
1500
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
ASME B16.47 SERIES A
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 93749.319.05...23.912.321.526
300 600
R 94800.119.05...23.912.321.528
300 600
R 95857.2519.05...23.912.321.530
300 600
R 96914.422.23...26.914.811.532
300 600
R 97965.222.23...26.914.811.534
300 600
R 981022.3522.23...26.914.811.536
300 600
R 100749.328.58...35.119.812.326
900
R 101800.131.75...38.122.332.328
900
R 102857.2531.75...38.122.332.330
900
R 103914.431.75...38.122.332.332
900
R 104965.234.93...41.424.822.334
900
R 1051022.3534.93...41.424.822.336
900
R
No
Dia
P
Width
A
HeightOct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
 

 

General notes:

  • P = average pitch diameter of ring ±0.18
  • A = width of ring ±0.20
  • B & H = height of ring +1.3. -0.5
  • Variation in height throughout the entire circumference of any given ring shall not exceed 0.5 within these tolerances
  • C = width of flat on octagonal ring ±0.20
  • R1 = radius in ring ±0.5
  • 23 deg = angle ±0 deg 30 min
  • R-30 = for lapped joint only