Dimensions of Non-Metallic Flat Gaskets ASME B16.21 used with RF flanges ASME B16.5


Dimensions of Non-Metallic Flat Gaskets


NPS 1/2-24

NPS
d1
d2
Class
150
Class
300
Class
400
Class
600
Class
900
1/2
21
48
54
54
54
64
3/4
27
57
67
67
67
70
1
33
67
73
73
73
79
1.1/4
42
76
83
83
83
89
1.1/2
48
86
95
95
95
98
2
60
105
111
111
111
143
2.1/2
73
124
130
130
130.2
165
3
89
137
149
149
149
168
3.1/2
102
162
165
162
162
 
4
114
175
181
178
194
206
5
141
197
216
213
241
248
6
168
222
251
248
267
289
8
219
279
308
305
321
359
10
273
340
362
359
400
435
12
324
410
422
419
457
498
14
356
451
486
483
492
521
16
406
514
540
537
565
575
18
457
549
597
594
613
638
20
508
606
654
648
683
699
24
610
718
775
768
791
838

General notes..

Dimensions are in millimeters unless otherwise indicated.

d1 = Inside diameter.

d2 = Outside diameter.

Dimensional tolerances outside diameter NPS 12 and smaller.. +0 / -1.5 mm.

Dimensional tolerances outside diameter NPS 14 and larger.. +0 / -3.0 mm.

Dimensional tolerances inside diameter NPS 12 and smaller.. ± 1.5 mm.

Dimensional tolerances inside diameter NPS 14 and larger.. ± 3.0 mm.

Thickness (t) specified by customer.