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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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