Metallic-Gaskets
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  RING TYPE JOINTS
Dimensions

 

Material Hardness Conversion Scale
Material Hardness
Size Designations for Oval or Octagonal Rings
Dimensions for Oval or Octagonal Rings
RX Gaskets for API 6B Flanges
BX Gaskets for API 6BX Flanges

 
Material Hardness Conversion Scale
Rockwell "B" Brinell3000 Kg. Load Rockwell "B" Brinell3000 Kg. Load
100241 6095
95210 5589
90183 5083
85163 4075
80146 3067
75134 2062
70122 1057
65108


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Material Hardness
Material Designation Maximum
Hardness
Rockwell B
Maximum
Hardness
Brinell
Soft Iron D 56 90
Low Carbon Steel S 68 120
4-6 Chrome F-5* 72 130
304 Stainless Steel S304 83 160
316 Stainless Steel S316 83 160
347 Stainless Steel S347 83 160
410 Stainless Steel S410 86 170


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Size Designations for Oval or Octagonal Rings
NominalPipe Size
Flange Pressure Rating
150# 300-600# 900# 1500# 2500#
1/2 - R-11 R-12 R-12 R-13
3/4 - R-13 R-14 R-14 R-16
1 R-15 R-16 R-16 R-16 R-18
1-1/4 R-17 R-18 R-18 R-18 R-21
1-1/2 R-19 R-20 R-20 R-20 R-23
2 R-22 R-23 R-24 R-24 R-26
2-1/2 R-25 R-26 R-27 R-27 R-28
3 R-29 R-31 R-31 R-35 R-32
3-1/2 R-33 R-34 R-34 - -
4 R-36 R-37 R-37 R-39 R-38
5 R-40 R-41 R-41 R-44 R-42
6 R-43 R-45 R-45 R-46 R-47
8 R-48 R-49 R-49 R-50 R-51
10 R-52 R-53 R-53 R-54 R-55
12 R-56 R-57 R-57 R-58 R-60
14 R-59 R-61 R-62 R-63 -
16 R-64 R-65 R-66 R-67 -
18 R-68 R-69 R-70 R-71 -
20 R-72 R73 R-74 R-75 -
22 R-80 R-81 - - -
24 R-76 R-77 R-78 R-79 -
26 - R-93 R-100 - -
28 - R-94 R-101 - -
30 - R-95 R-102 - -
32 - R-96 R-103 - -
34 - R-97 R-104 - -
36 - R-98 R-105 - -
* F5 identification designates ASTM Specification A-182 chemical composition requirements only.


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Dimensions for Oval or Octagonal Rings
A.S.A. and
A.P.I.Ring
Number
Gasket Dimensions (Inches)
Gasket Weight lbs.
Center ToCenter Inside Diameter Outside Diameter Width of Ring Height of Ring
Oval        Octagonal Oval Rings Octagonal Rings
R11 1-11/32 1-3/32 1-19/32 1/4 7/16 3/8 0.111 0.104
R12 1-9/16 1-1/4 1-7/8 5/16 9/16 1/2 0.216 0.2
R13 1-11/16 1-3/8 2 5/16 9/16 1/2 0.234 0.216
R14 1-3/4 1-7/16 2-1/16 5/16 9/16 1/2 0.242 0.224
R15 1-7/8 1-9/16 2-3/16 5/16 9/16 1/2 0.26 0.24
R16 2 1-11/16 2-5/16 5/16 9/16 1/2 0.278 0.256
R17 2-1/4 1-15/16 2-9/16 5/16 9/16 1/2 0.311 0.288
R18 2-3/8 2-1/16 2-11/16 5/16 9/16 1/2 0.328 0.304
R19 2-9/19 2-1/4 2-7/8 5/16 9/16 1/2 0.354 0.328
R20 2-11/16 2-3/8 3 5/16 9/16 1/2 0.372 0.344
R21 2-27/32 2-13/32 3-9/32 7/16 1-1/16 5/8 0.66 0.643
R22 3-1/4 2-15/16 3-9/16 5/16 9/16 1/2 0.45 0.415
R23 3-1/4 2-13/16 3-11/16 7/16 1-1/16 5/8 0.755 0.734
R24 3-3/4 3-5/16 4-3/16 7/16 1-1/16 5/8 0.87 0.846
R25 4 3-11/16 4-5/16 7/16 9/16 1/2 0.553 0.51
R26 4 3-9/16 4-7/16 7/16 1-1/16 5/8 0.93 0.904
R27 4-1/4 3-13/16 4-11/16 7/16 1-1/16 5/8 1.05 0.96
R28 4-3/8 3-7/8 4-7/8 1/2 3/4 1-1/16 1.255 1.23
R29 4-1/2 4-3/16 4-13/16 5/16 9/16 1/2 0.622 0.575
R30 4-5/8 4-3/16 5-1/16 7/16 1-1/16 5/8 1.075 1.047
R31 4-7/8 4-7/16 5-5/16 7/16 1-1/16 5/8 1.13 1.1
R32 5 4-1/2 5-1/2 1/2 3/4 1-1/16 1.435 1.405
R33 5-3/16 4-7/8 5-1/2 5/16 9/16 1/2 0.718 0.664
R34 5-3/16 4-3/4 5-5/8 7/16 1-1/16 5/8 1.2 1.17
R35 5-3/8 4-15/16 5-13/16 7/16 1-1/16 5/8 1.25 1.21
R36 5-7/8 5-9/16 6-3/16 5/16 9/16 1/2 0.813 0.735
R37 5-7/8 5-7/16 6-5/16 7/16 1-1/16 5/8 1.36 1.33
R38 6-3/16 5-9/16 6-13/16 5/8 7/8 13/16 2.56 2.52
R39 6-3/8 5-15/16 6-13/16 7/16 1-1/16 5/8 1.48 1.44
R40 6-3/4 6-7/16 7-1/16 7/16 9/16 1/2 0.935 0.865
R41 7-1/8 6-11/16 7-9/16 7/16 11/16 5/8 1.66 1.61
R42 7-1/2 6-3/4 8-1/4 3/4 1 15/16 4.21 4.16
R43 7-5/8 7-5/16 7-15/16 5/16 9/16 1/2 1.055 0.975
R44 7-5/8 7-3/16 8-1/16 7/16 1-1/16 5/8 1.77 1.73
R45 8-5/16 7-7/8 8-3/4 7/16 1-1/16 5/8 1.93 1.88
R46 8-5/16 7-13/16 8-13/16 1/2 3/4 1-1/16 2.39 2.33
R47 9 8-1/4 9-3/4 3/4 1 15-16 5.06 4.99
R48 9-3/4 9-7/16 10-1/16 5/16 9/16 1/2 1.35 1.24
R49 10-5/8 10-3/16 11-1/16 7/16 1-1/16 5/8 2.47 2.4
R50 10-5/8 10 11-1/4 5/8 7/8 13/16 4.4 4.32
R51 11 10-1/8 11-7/8 7/8 1-1/8 1/1/16 8.05 8.17
R52 12 11-11/16 12-5/16 5/16 9-16 1/2 1.66 1.53
R53 12-3/4 12-5/16 13-3/16 7/16 1-1/16 5/8 3 2.88
R54 12-3/4 12-1/8 13-3/8 5/8 7/8 13/16 5.29 5.18
R55 13-1/2 12-3/8 14-5/8 1-1/8 1-7/16 1-3/8 16.23 17.08
R56 15 14-11/16 15-5/16 5/16 9/16 1/2 2.07 1.92
R57 15 14-9/16 15-7/16 7/16 1/1-16 5/8 3.48 3.38
R58 15 14-1/8 15-7/8 7/8 1-1/8 1-1/16 11 11.13
R59 15-5/8 15-5/16 15-15/16 5/16 9-16 1/2 2.16 2
R60 16 14-3/4 17-1/4 1-1/4 1-9/16 1-1/2 23.1 23.5
R61 16-1/2 16-1/16 16-15/16 7/16 1-1/16 5/8 3.83 3.73
R62 16-1/2 15-7/8 17-1/8 5/8 7/8 13/16 6.84 6.71
R63 16-1/2 15-1/2 17-1/2 1 1-5/16 1-1/4 16.20 16.67
R64 17-7/8 17-9/16 18-3/16 5/16 9/16 1/2 2.47 2.29
R65 18-1/2 18-1/16 18-15/16 7/16 1-1/16 5/8 4.3 4.18
R66 18-1/2 17-7/8 19-1/8 5/8 7/8 13/16 7.67 7.53
R67 18-1/2 17-3/8 19-5/8 1-1/8 1-7/16 1-3/8 22.3 23.4
R68 20-3/8 20-1/16 20-11/16 5/16 9/16 1/2 2.82 2.6
R69 21 20-9/16 21-7/16 7/16 1-1/16 5/8 4.87 4.74
R70 21 20-1/4 21-3/4 3/4 1 15/16 11.80 11.64
R71 21 19-7/8 22-1/8 1-1/8 1-7/16 1-3/8 25.2 26.5
R72 22 21-11/16 22-5/16 5/16 9/16 1/2 3.04 2.81
R73 23 22-1/2 23-1/2 1/2 3/4 11-1/16 6.6 6.47
R74 23 22-1/4 23-3/4 3/4 1 15-16 12.95 12.75
R75 23 21-3/4 24-1/4 1-1/4 1-9/16 1-1/2 33.3 35.3
R76 26-1/2 26-3/16 26-13/16 5/16 9/16 1/2 3.66 3.38
R77 27-1/4 26-5/8 27-7/8 5/8 7/8 13/16 11.3 11.1
R78 27-1/4 26-1/4 28-1/4 1 1-5/16 1-1/4 27.1 27.58
R79 27-1/4 25-7/8 28-5/8 1-3/8 1-3/4 1-5/8 48.7 49.75
R80 24-1/4 23-15/16 24-9/16 5/16 - 1/2 - 3.11
R81 25 24-7/16 25-9/16 9/16 - 3/4 - 8.55
R82 2-1/4 1-13/16 2-11/16 7/16 - 5/8 - 0.508
R84 2-1/2 2-1/16 2-15/16 7/16 - 5/8 - 0.564
R85 3-1/8 2-5/8 3-5/8 1/2 - 1-1/16 - 0.978
R86 3-9/16 2-15/16 4-3/16 5/8 - 13/16 - 1.447
R87 3-15/16 3-5/16 4-9/16 5/8 - 13/16 - 1.597
R88 4-7/8 4-1/8 5-5/8 3/4 - 15/16 - 2.735
R89 4-1/2 3-3/4 5-1/4 3/4 - 15/16 - 2.528
R90 6-1/8 5-1/4 7 7/8 - 1-1/16 - 4.55
R91 10-1/4 9 11-1/2 1-1/4 - 1-1/2 - 15.05
R92 9 8-9/16 9-7/16 7/16 1-1/16 5/8 2.07 2.02
R93 29-1/2 28-3/4 30-1/4 3/4 - 15/16 - 16.33
R94 31-1/2 30-3/4 32-1/4 3/4 - 15/16 - 17.44
R95 33-3/4 33 34-1/2 3/4 - 15/16 - 18.69
R96 36 35-1/8 36-7/8 7/8 - 1-1/16 - 26.65
R97 38 37-1/8 38-7/8 7/8 - 1-1/16 - 28.13
R98 40-1/4 29-3/8 41-1/8 3/8 - 1-1/16 - 29.79
R99 9-1/4 8-13/16 9-11/16 7/16 - 5/8 - 2.08
R100 R100 through R105. Information on request


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RX Gaskets for API 6B Flanges
API Ring Number
Sizes of Flange (Inches)
Gasket Weight lbs.
720-960 2000lbs. 2900- lbs. 3000- lbs. 5000- lbs.
RX20 1-1/2 - 1-1/2 1-1/2 0.527
RX23 2 - - - 1.15
RX24 - - 2 2 1.33
RX26 2-1/2 - - - 1.42
RX27 - - 2-1/2 2-1/2 1.5
RX31 3 - 3 - 1.73
RX35 - - - 3 1.91
RX37 4 - 4 - 2.09
RX39 - - - 4 2.27
RX41 5 - 5 - 2.54
RX44 - - - 5 2.72
RX45 6 - 6 - 2.96
RX46 - - - 6 3.66
RX47 - - - 8* 8.56
RX49 8 - 8 - 3.79
RX50 - - - 8 5.36
RX53 10 - 10 - 4.56
RX54 - - - 10 6.45
RX57 12 - 12 - 5.36
RX63 - - - 14 26.4
RX65 16 - - - 6.63
RX66 - - 16 - 9.39
RX69 18 - - - 7.52
RX70 - - 18 - 20.14
RX73 20 - - - 11.63
RX74 - - 20 - 22.1
RX82 - 1 - - 0.79
RX84 - 1-1/2 - - 0.88
RX85 - 2 - - 0.88
RX86 - 2-1/2 - - 1.79
RX87 - 3 - - 1.98
RX88 - 4 - - 3.22
RX89 - 3-1/2 - - 2.98
RX90 - 5 - - 6.82
RX91 - 10 - - 17.1
RX99 - - 8* - 3.31
RX201 - - - 1-1/4 0.25
RX205 - - - 1-3/4 0.3
RX210 - - - 2-1/2 0.75
RX215 - - - 4 1.5
*Crossover flange connection.


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BX Gaskets for API 6BX Flanges
API Ring Number
Nominal Flange Bore (Inches)
Gasket Weight lbs.
2,000 psi 3,000 psi 5,000 psi 10,000 psi 15,000 psi 20,000 psi
BX-150 - - - 1-11/16 1-11/16 - 0.295
BX-151 - - - 1-13/16 1-13/16 1-13/16 0.337
BX-152 - - - 2-1/16 2-1/16 2-1/16 0.425
BX-153 - - - 2-9/16 2-9/16 2-9/16 0.632
BX-154 - - - 3-1/16 3-1/16 3-1/16 0.875
BX-155 - - - 4-1/16 4-1/16 4-1/16 1.22
BX-156 - - - 7-1/16 7-1/16 7-1/16 4.14
BX-157 - - - 9 9 - 6.55
BX-158 - - - 11 11 - 9.6
BX-159 - - - 13-5/8 - - 14.41
BX-160 - - 13-5/8 - - - 6.75
BX-161 - - 16-3/4 - - - 10.437
BX-162 - - 16-3/4 - - - 4.375
BX-163 - - 18-3/4 - - - 14.375
BX-164 - - - - - - 21
BX-165 - - 21-1/4 - - - 18.375
BX-166 - - - - - - 27.5
BX-167 26-3/4 - - - - - 18
BX168 - 26-3/4 - - - - 24.5
BX-169 - 5-1/8 - - - - -
BX-170 - 6-5/8 - - - - -
BX-171 - 8-9/16 - - - - -
BX-172 - 11-5/32 - - - - -
BX-303 - 30 - - - - -
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Hopewell Business Park
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Edmonton, AB   
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P 780.463.4049
F 780.461.7009
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Building B - Bay 25
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Calgary, AB     
T2C 4X7

P 403.279.7007
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