Dimensions Ring-Joint Facings -ASME B16.5- Pressure Class 300


flanges

 
Class 300

Class
300
NPS
Groove
No.
Pitch
Dia
P
Depth
E
Note (1)
Width
F
Radius
at bottom
R
1/2R1134.145.547.140.8
...R1239.676.358.740.8
3/4R1342.886.358.740.8
...R1444.456.358.740.8
...R1547.636.358.740.8
1R1650.86.358.740.8
...R1757.156.358.740.8
R1860.336.358.740.8
...R1965.076.358.740.8
R2068.276.358.740.8
...R2172.237.9211.910.8
...R2282.556.358.740.8
2R2382.557.9211.910.8
...R2495.257.9211.910.8
...R25101.66.358.740.8
R26101.67.9211.910.8
...R27107.957.9211.910.8
...R28111.139.5313.491.5
...R29114.36.358.740.8
Note (2)R30117.487.9211.910.8
3
Note (2)
R31123.837.9211.910.8
...R321279.5313.491.5
...R33131.786.358.740.8
R34131.787.9211.910.8
...R35136.537.9211.910.8
...R36149.236.358.740.8
4R37149.237.9211.910.8
...R38157.1811.1316.661.5
...R39161.937.9211.910.8
...R40171.456.358.740.8
5R41180.987.9211.910.8
...R42190.512.719.841.5
...R43193.686.358.740.8
...R44193.687.9211.910.8
Class
300
NPS
Groove
No.
Pitch
Dia
P
Depth
E
Note (1)
Width
F
Radius
at bottom
R
6R45211.127.9211.910.8
...R46211.149.5313.491.5
...R47228.612.719.841.5
...R48247.656.358.740.8
8R49269.887.9211.910.8
...R50269.8811.1316.661.5
...R51279.414.2723.011.5
...R52304.86.358.740.8
10R53323.857.9211.910.8
...R54323.8511.1316.661.5
...R55342.917.4830.182.4
...R563816.358.740.8
12R573817.9211.910.8
...R5838114.2723.011.5
...R59396.886.358.740.8
...R60406.417.4833.322.4
14R61419.17.9211.910.8
...R62419.111.1316.661.5
...R63419.115.8826.972.4
...R64454.036.358.740.8
16R65469.97.9211.910.8
...R66469.911.1316.661.5
...R67469.917.4830.182.4
...R68517.536.358.740.8
18R69533.47.9211.910.8
...R70533.412.719.841.5
...R71533.417.4830.182.4
...R72558.86.358.740.8
20R73584.29.5313.491.5
...R74584.212.719.841.5
...R75584.217.4833.322.4
...R76673.16.358.740.8
24R77692.1511.1316.661.5
...R78692.1515.8826.972.4
...R79692.1520.6236.532.4
Class
300
NPS
Groove
No.
Pitch
Dia
P
Depth
E
Note (1)
Width
F
Radius
at bottom
R

Notes:

  • The height of the raised portion is equal to the depth of the groove dimension, E, but is not subjected to the tolerances for E. Former full-face contour may be used.
  • For ring joints with lapped flanges in Classes 300 and 600, ring and groove number R30 is used instead of R31.
Diameter of Raised Portion, K


Diameter of Raised Portion, K
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
...51
1/2
...51
1/2
.........
...............60.5
1/2
...
...63.5
3/4
...63.5
3/4
......65
1/2
...............66.5
3/4
...
63.5
1
..................
...70
1
...70
1
...71.5
1
73
3/4
73
..................
...79.5
...79.5
...81
82.5
1
82.5
..................
...90.5
...90.5
...92
...
..................102
102
2
..................
...108
2
...108
2
......114
...............124
2
...
121
..................
...127
...127
......133
2
...............137
...
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
..................149
133
3
..................
.....................
...146
3
...146
3
156
3
......
..................168
3
154
..................
...159
...159
.........
...............168
3
...
171
4
..................
...175
4
175
4
175
4
181
4
......
..................203
4
...............194
4
...
194
5
..................
...210
5
210
5
210
5
216
5
......
..................241
5
219
6
..................
...............229
5
...
...241
6
241
6
241
6
241
6
......
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
...............248
6
...
..................279
6
273
8
..................
...302
8
302
8
302
8
308
8
......
...............318
8
...
..................340
8
330
10
..................
...356
10
356
10
356
10
362
10
......
...............371
10
...
..................425
10
406
12
..................
...413
12
413
12
413
12
419
12
......
...............438
12
...
425
14
..................
..................495
12
...457
14
457
14
457
14
.........
............467
14
......
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
...............489
14
...
483
16
..................
...508
16
508
16
508
16
.........
............524
16
......
...............546
16
...
546
18
..................
...575
18
575
18
575
18
.........
............594
18
......
...............613
18
...
597
20
..................
...635
20
635
20
635
20
.........
............648
20
......
...............673
20
...
711
24
..................
...749
24
749
24
749
24
.........
............772
24
......
...............794
24
...
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
Diameter of Raised Portion, K
Approximate Distance Between Flanges, X


Approximate Distance Between Flanges, X
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
...3
1/2
...3
1/2
.........
...............4
1/2
...
...4
3/4
...4
3/4
......4
1/2
...............4
3/4
...
4
1
..................
...4
1
...4
1
...4
1
4
3/4
4
..................
...4
...4
...4
4
1
4
..................
...4
...4
...4
...
..................3
4
2
..................
...6
2
...5
2
......3
...............3
2
...
4
..................
...6
...5
......3
2
...............3
...
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
..................3
4
3
..................
.....................
...6
3
...5
3
4
3
......
..................3
3
4
..................
...6
...5
.........
...............3
3
...
4
4
..................
...6
4
6
4
5
4
4
4
......
..................4
4
...............3
4
...
4
5
..................
...6
5
6
5
5
5
4
5
......
..................4
5
4
6
..................
...............3
5
...
...6
6
6
6
5
6
4
6
......
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
...............3
6
...
..................4
6
4
8
..................
...6
8
6
8
5
8
4
8
......
...............4
8
...
..................5
8
4
10
..................
...6
10
6
10
5
10
4
10
......
...............4
10
...
..................6
10
4
12
..................
...6
12
6
12
5
12
4
12
......
...............5
12
...
3
14
..................
..................8
12
...6
14
6
14
5
14
.........
............4
14
......
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
...............6
14
...
3
16
..................
...6
16
6
16
5
16
.........
............4
16
......
...............8
16
...
3
18
..................
...6
18
6
18
5
18
.........
............5
18
......
...............8
18
...
3
20
..................
...6
20
6
20
5
20
.........
............5
20
......
...............10
20
...
3
24
..................
...6
24
6
24
6
24
.........
............6
24
......
...............11
24
...
Class
150
NPS
Class
300
NPS
Class
400
NPS
Class
600
NPS
Class
900
NPS
Class
1500
NPS
Class
2500
NPS
Approximate Distance Between Flanges, X
 

 

General Notes:

  • Dimensions are in millimeters unless otherwise indicated.
  • Use Class 600 sizes NPS 1/2 to NPS 3½ for Class 400.
  • Use Class 1500 in sizes NPS 1/2 to NPS 2½ for Class 900.
  • Ring joint gasket materials shall conform to ASME B16.20.
  • The edge (periphery) of each ring joint flange shall be marked with the letter R and the corresponding ring groove number.

Notes:

  • The height of the raised portion is equal to the depth of the groove dimension, E, but is not subjected to the tolerances for E. Former full-face contour may be used.
  • For ring joints with lapped flanges in Classes 300 and 600, ring and groove number R30 is used instead of R31.

TOLERANCES

E (depth) +0.4 -0.0, F (width) ±0.2, P (pitch diameter) ±0.13, R (radius at bottom)? 2 + 0.8 -0.0, > 2 ± 0.8, 23° (angle) ± 1/2°