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Metal-Jacketed Gasket Dimensions

Class 150-900 � NPS 1/2-24

General notes:

  • Dimensions are in millimeters unless otherwise indicated.
  • Images shows Grooved Gaskets with Covering Layer and Centering Ring.
  • d1 = Inside diameter.
  • d2 = Outside diameter.
  • d3 = Outside diameter of centering ring.
  • Thickness (t) specified by customer.

Dimensions of Non-Metallic Flat Gaskets ASME B16.21 to be used with Raised Face flanges ASME B16.5

Class 150 - 400

Ball Long Pattern
NPS
d1
d3
150
300
400
1/2
23.8
44.5
50.8
50.8
3/4
31.8
54
63.5
63.5
1
36.5
63.5
69.8
69.8
1¼
46
73
79.4
79.4
1½
52.4
82.6
92.1
92.1
2
73.2
101.6
108
108
2½
85.9
120.6
127
127
3
107.8
133.4
146.1
146.1
4
131.8
171.5
177.8
174.7
5
152.4
193.7
212.7
209.5
6
190.5
219.1
247.7
244.5
8
238.3
276.2
304.8
301.7
10
285.8
336.6
358.8
355.6
12
342.9
406.4
419.1
415.9
14
374.7
447.7
482.6
479.4
16
425.5
511.2
536.6
533.4
18
489
546.1
593.7
590.6
20
533.4
603.3
650.9
644.5
24
641.4
714.4
771.6
765.3
NPS
d1
150
300
400
d2

Class 600 - 2500

Ball Long Pattern
NPS
d1
d2
600
900
1500
2500
1/2
23.8
50.8
60.4
60.4
66.8
3/4
31.8
63.5
66.7
66.7
73.1
1
36.5
69.9
76.2
76.2
82.5
1¼
46
79.4
85.8
85.8
101.6
1½
52.4
92.1
95.3
95.3
114.3
2
73.2
108
139.7
139.7
143
2½
85.9
127
161.9
161.9
165.1
3
107.8
146.1
165.1
171.5
193.8
4
131.8
190.5
203.2
206.5
231.9
5
152.4
238.2
244.6
250.9
276.3
6
190.5
263.6
285.8
279.4
314.5
8
238.3
317.5
355.6
349.3
384.3
10
285.8
369.9
431.8
431.8
473.2
12
342.9
454.1
495.3
517.6
546.1
14
374.7
489
517.6
574.7
...
16
425.5
562
571.5
638.2
...
18
489
609.6
635
701.8
...
20
533.4
679.5
695.5
752.5
...
24
641.4
787.4
835.1
898.6
...
NPS
d1
600
900
1500
2500
d2

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