Rosemount 1495 - Page 36

Reference Manual
00809-0100-4792, Rev CA
August 2010
Rosemount 1495, 1496
4-10
Figure 4-6. Class 2500
(1)
Nominal
Pipe Size
Bore B
Diameter
of
Pressure
Conn-
ection TT
Drilling Template Length of Stud Bolts
(2)(3) (4)
Diameter of
Bolt Circle
Number of
Holes
Diameter of
Holes
Diameter of
Bolts
Raised Face Ring Joint
1
1
/4 4.00 4 1.00
7
/8 6.00 6.25
1
1
/2
1
/4 4.88 4 1.12 1 6.25 6.50
2
1
/4 6.50 8 1.00
7
/8 6.00 6.50
2
1
/2
1
/4 7.50 8 1.12 1 6.50 7.00
3
3
/8 8.00 8 1.25 1
1
/8 7.25 7.25
4
1
/2 9.50 8 1.38 1
1
/4 8.00 8.50
6
1
/2 12.50 12 1.50 1
3
/8 10.50 11.00
8
1
/2 15.50 12 1.75 1
5
/8 11.75 12.25
10
1
/2 19.00 12 2.00 1
7
/8 13.50 14.00
12
1
/2 22.50 16 2.12 2 15.00 15.75
14
1
/2 25.00 16 2.38 2
1
/4 16.25 17.52
16
1
/2 27.75 16 2.62 2
1
/2 17.75 19.00
18
1
/2 30.50 16 2.88 2
3
/4 19.75 21.00
20
1
/2 32.75 16 3.12 3 21.50 22.50
24
1
/2 39.00 16 3.62 3
1
/2 24.50 26.00
(1) All other dimensions are in accordance with ASME B16.5.
(2) Bolt lengths for raised face flanges include allowance for orifice and gasket thickness of 0.25 in. for NPS 1-12 and 0.38 in. for NPS 14-24. Bolt lengths for ring
type joint flanges include allowance of 0.62 in. for NPS 1-10, 0.75 in. for NPS 12-18, and 0.88 in. for NPS 20.
(3) In conformance with ASME B16.5, stud bolt lengths do not include point heights.
(4) Bore is to be specified by the purchaser.
See Note
(4)
.
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