ASME B16.48-2010 figure-8 (spectacle) blanks, paddle blanks and paddle spacers — inside/outside diameter (B, O), centerline (A), thickness (t) and web width (W) by pressure class, flange facing and unit system.
Figure-8 schematic
TypeFigure-8
Class150
FacingRF
NPS2
B (mm)61
O (mm)102
A (mm)120
t (mm)6.4
W (mm)51
20 sizes — click a row to inspect
Class 150 · RF
NPS
Bmm
Omm
Amm
tmm
Wmm
1/2
16
45
60
3.0
38
3/4
21
54
70
3.0
38
1
27
64
80
3.0
38
1-1/4
42
73
90
6.4
38
1-1/2
48
83
100
6.4
38
2
61
102
120
6.4
51
2-1/2
73
107
140
6.4
51
3
89
133
150
6.4
64
3-1/2
102
159
175
9.7
64
4
114
172
190
9.7
64
5
141
194
215
9.7
76
6
168
219
240
12.7
76
8
219
276
300
12.7
76
10
273
337
360
15.7
102
12
324
406
430
19.1
102
14
356
448
475
19.1
108
16
406
511
540
22.4
108
18
457
546
580
25.4
114
20
508
603
635
28.4
121
24
610
714
750
31.8
140
BInside diameter (bore)
OOutside diameter
ACenterline dimension (handle length)
tBlank thickness
WWeb / tie-bar width
Table notes
N1Where a hole is required because of bolt spacing, use the same diameter as the flange bolt hole and position it so it does not interfere with bolting between the two flanges.
N2 RAISED FACERaised face is optional; see ASME B16.48 para. 4.3.1.
N3Web or tie-bar thickness Wt is determined by ASME B16.48 para. 4.1 and is not tabulated.
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