Rosemount 1495 - Page 35

Reference Manual
00809-0100-4792, Rev CA
August 2010
4-9
Rosemount 1495, 1496
Figure 4-5. Class 1500
Table 4-4. Class 1500 Orifice Flanges, Welding Neck
(1)
Nominal
Pipe
Size
Out-
side
Diam-
eter of
Raised
Face R
Out-
side
Diam-
eter of
Flange O
Thickness
of Flange,
Min. C
Length
Through
Hub Y
Ring Type Joint
Diam-
eter of
Hub X
Hub Diam-
eter
Beginning
of
Chamfer A
Groove
Number
Pitch
Diam-et
er P
Groove
Depth E
Groove
Width F
Radius
at
Bottom
r
max
Special
Oval
Ring
Height
W
1 2.00 5.88 1.50 3.25 R16 2.000 0.250 0.344 0.03 1.00 2.06 1.32
1
1
/2 2.88 7.00 1.50 3.50 R20 2.688 0.250 0.344 0.03 1.00 2.75 1.90
2 3.62 8.50 1.50 4.00 R24 3.750 0.312 0.469 0.03 1.06 4.12 2.38
2
1
/2 4.12 9.62 1.62 4.12 R27 4.250 0.312 0.469 0.03 1.06 4.88 2.88
3 5.00 10.50 1.88 4.62 R35 5.375 0.312 0.469 0.03 1.06 5.25 3.50
4 6.19 12.25 2.12 4.88 R39 6.375 0.312 0.469 0.03 1.06 6.38 4.50
6 8.50 15.50 3.25 6.75 R46 8.312 0.375 0.531 0.06 1.12 9.00 6.63
8 10.62 19.00 3.62 8.38 R50 10.625 0.438 0.656 0.06 1.31 11.50 8.63
10 12.75 23.00 4.25 10.00 R54 12.750 0.438 0.656 0.06 1.31 14.50 10.75
12 15.00 26.50 4.88 11.12 R58 15.000 0.562 0.806 0.06 1.56 17.75 12.75
14 16.25 29.50 5.25 11.75 R63 16.500 0.625 1.062 0.09 1.75 19.50 14.00
16 18.50 32.50 5.75 12.25 R67 18.500 0.688 1.188 0.09 2.00 21.75 16.00
18 21.00 36.00 6.38 12.88 R71 21.000 0.688 1.188 0.09 2.00 23.50 18.00
20 23.00 38.75 7.00 14.00 R75 23.000 0.688 1.312 0.09 2.12 25.25 20.00
24 27.25 46.00 8.00 16.00 R79 27.250 0.812 1.438 0.09 2.31 30.00 24.00
X
A
B
1
R
O
Raised Face
Y
C
0.25 0.94
1/2 NPT (1)
1
P
Ring Type Joint
Y
C
E
0.75
Special One or Two
Piece Ring and
Orifice Plate Assembly
W
Groove
Detail
E
F
23 deg.
r