B
2
: Flange thickness without gasket surface
F=B
1
-B
2
: Gasket surface thickness
G: Gasket surface diameter
# Bolts: Number of bolts
K: Bolt hole circle diameter
Dimensions are in inches (millimeters).
Note
Dimensions may be used to aid in the identification of installed flanges. It is not intended
for manufacturing use.
Table A-24: Dimensions of Proprietary Flanges
D
B
1
B
2
F
G
# Bolts
K
Fisher
™
249B/
259B
9.00 (228.6) 1.50 (38.2)
1.25 (31.8)
0.25 (6.4)
5.23 (132.8) 8
7.25 (184.2)
Fisher 249C
5.69 (144.5) 0.94 (23.8)
1.13 (28.6)
-0.19 (-4.8)
3.37 (85.7)
8
4.75
(120.65)
Masoneilan
™
7.51(191.0) 1.54 (39.0)
1.30 (33.0)
0.24 (6.0)
4.02 (102.0) 8
5.87 (149.0)
(1)
These flanges are also available in a vented version. Vented flanges must be ordered with a 1
½
-in. NPT threaded
process connection (code RA).
(2)
Flange with raised face.
(3)
Flange with recessed face.
For information about flange temperature and pressure ratings, see
A.6
Flushing connection rings
Figure A-39: Flushing Connection Rings
'
R
'
L
'
+
$
A. Height: 0.97 in. (24.6 mm)
Table A-25: Pressure and Temperature Rating for Flushing Ring up to Class 2500
Flushing connection
rings
D
i
D
o
D
H
2 in. ANSI
2.12 (53.8)
3.62 (91.9)
¼
in. NPT
3 in. ANSI
3.60 (91.4)
5.00 (127.0)
¼
in. NPT
4 in. ANSI/DN100
3.60 (91.4)
6.20 (157.5)
¼
in. NPT
Reference Manual
Specifications and reference data
00809-0100-4530
April 2019
Reference Manual
325