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Gaskets

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

Oval and Octagonal Type R ring gaskets

ASME B16.5

R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 11 34.14 6.35 11.2 9.7 4.32 1.5 1/2
300 600
R 12 39.7 7.95 14.2 12.7 5.23 1.5 1/2
900 1500
R 13 42.88 7.95 14.2 12.7 5.23 1.5 3/4
300 600
1/2
2500
R 14 44.45 7.95 14.2 12.7 5.23 1.5 3/4
900 1500
R 15 47.63 7.95 14.2 12.7 5.23 1.5 1
150
R 16 50.8 7.95 14.2 12.7 5.23 1.5 1
300 1500
3/4
2500
R 17 57.15 7.95 14.2 12.7 5.23 1.5 1.1/4
150
R 18 60.33 7.95 14.2 12.7 5.23 1.5 1.1/4
300 1500
1
2500
R 19 65.1 7.95 14.2 12.7 5.23 1.5 1.1/2
150
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 20 68.28 7.95 14.2 12.7 5.23 1.5 1.1/2
300 1500
R 21 72.24 11.13 17.5 16 7.75 1.5 1.1/4
2500
R 22 82.55 7.95 14.2 12.7 5.23 1.5 2
150
R 23 82.55 11.13 17.5 16 7.75 1.5 2
300 600
1.1/2
2500
R 24 95.25 11.13 17.5 16 7.75 1.5 2
900 1500
R 25 101.6 7.95 14.2 12.7 5.23 1.5 2.1/2
150
R 26 101.6 11.13 17.5 16 7.75 1.5 2.1/2
300 600
2
2500
R 27 107.95 11.13 17.5 16 7.75 1.5 2.1/2
900 1500
R 28 111.13 12.7 19.1 17.5 8.66 1.5 2.1/2
2500
R 29 114.3 7.95 14.2 12.7 5.23 1.5 3
150
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 30
*
117.48 11.13 17.5 16 7.75 1.5 3
300 600
R 31 123.83 11.13 17.5 16 7.75 1.5 3
300 900
R 32 127 12.7 19.1 17.5 8.66 1.5 3
2500
R 33 131.78 7.95 14.2 12.7 5.23 1.5 3.1/2
150
R 34 131.78 11.13 17.5 16 7.75 1.5 3.1/2
300 600
R 35 136.53 11.13 17.5 16 7.75 1.5 3
1500
R 36 149.23 7.95 14.2 12.7 5.23 1.5 4
150
R 37 149.23 11.13 17.5 16 7.75 1.5 4
300 900
R 38 157.18 15.88 22.4 20.6 10.49 1.5 4
2500
R 39 161.93 11.13 17.5 16 7.75 1.5 4
1500
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 40 171.45 7.95 14.2 12.7 5.23 1.5 5
150
R 41 180.98 11.13 17.5 16 7.75 1.5 5
300 900
R 42 190.5 19.05 25.4 23.9 12.32 1.5 5
2500
R 43 193.68 7.95 14.2 12.7 5.23 1.5 6
150
R 44 193.68 11.13 17.5 16 7.75 1.5 5
1500
R 45 211.15 11.13 17.5 16 7.75 1.5 6
300 900
R 46 211.15 12.7 19.1 17.5 8.66 1.5 6
1500
R 47 228.6 19.05 25.4 23.9 12.32 1.5 6
2500
R 48 247.65 7.95 14.2 12.7 5.23 1.5 8
150
R 49 269.88 11.13 17.5 16 7.75 1.5 8
300 900
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 50 269.88 15.88 22.4 20.6 10.49 1.5 8
1500
R 51 279.4 22.23 28.7 26.9 14.81 1.5 8
2500
R 52 304.8 7.95 14.2 12.7 5.23 1.5 10
150
R 53 323.85 11.13 17.5 16 7.75 1.5 10
300 900
R 54 323.85 15.88 22.4 20.6 10.49 1.5 10
1500
R 55 342.9 28.58 36.6 35.1 19.81 2.3 10
2500
R 56 381 7.95 14.2 12.7 5.23 1.5 12
150
R 57 381 11.13 17.5 16 7.75 1.5 12
300 900
R 58 381 22.23 28.7 26.9 14.81 1.5 12
1500
R 59 396.88 7.95 14.2 12.7 5.23 1.5 14
150
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 60 406.4 31.75 39.6 38.1 22.33 2.3 12
2500
R 61 419.1 11.13 17.5 16 7.75 1.5 14
300 600
R 62 419.1 15.88 22.4 20.6 10.49 1.5 14
900
R 63 419.1 25.4 33.3 31.8 17.3 2.3 14
1500
R 64 454.03 7.95 14.2 12.7 5.23 1.5 16
150
R 65 469.9 11.13 17.5 16 7.75 1.5 16
300 600
R 66 469.9 15.88 22.4 20.6 10.49 1.5 16
900
R 67 469.9 28.58 36.6 35.1 19.81 2.3 16
1500
R 68 517.53 7.95 14.2 12.7 5.23 1.5 18
150
R 69 533.4 11.13 17.5 16 7.75 1.5 18
300 600
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 70 533.4 19.05 25.4 23.9 12.32 1.5 18
900
R 71 533.4 28.58 36.6 35.1 19.81 2.3 18
1500
R 72 558.8 7.95 14.2 12.7 5.23 1.5 20
150
R 73 584.2 12.7 19.1 17.5 8.66 1.5 20
300 600
R 74 584.2 19.05 25.4 23.9 12.32 1.5 20
900
R 75 584.2 31.75 39.6 38.1 22.33 2.3 20
1500
R 76 673.1 7.95 14.2 12.7 5.23 1.5 24
150
R 77 692.15 15.88 22.4 20.6 10.49 1.5 24
300 600
R 78 692.15 25.4 33.3 31.8 17.3 2.3 24
900
R 79 692.15 34.93 44.5 41.4 24.82 2.3 24
1500
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
Oval and Octagonal Type R ring gaskets

ASME B16.47 SERIES A

R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H
R 93 749.3 19.05   23.9 12.32 1.5 26
300 600
R 94 800.1 19.05   23.9 12.32 1.5 28
300 600
R 95 857.25 19.05   23.9 12.32 1.5 30
300 600
R 96 914.4 22.23   26.9 14.81 1.5 32
300 600
R 97 965.2 22.23   26.9 14.81 1.5 34
300 600
R 98 1022.35 22.23   26.9 14.81 1.5 36
300 600
R 100 749.3 28.58   35.1 19.81 2.3 26
900
R 101 800.1 31.75   38.1 22.33 2.3 28
900
R 102 857.25 31.75   38.1 22.33 2.3 30
900
R 103 914.4 31.75   38.1 22.33 2.3 32
900
R 104 965.2 34.93   41.4 24.82 2.3 34
900
R 105 1022.35 34.93   41.4 24.82 2.3 36
900
R
No
Dia
P
Width
A
Height Oct
C
Oct
R1
NPS
CL
Oval
B
Oct
H

General notes:

All dimensions are in millimeters.

Tolerances:

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 ° = angle ±0 ° 30 min

*R-30 = for lapped joint only

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