Rosemount 1495, Installation & Operation Manual

Page: 33 / 70

Reference Manual
00809-0100-4792, Rev CA
August 2010
4-7
Rosemount 1495, 1496
Figure 4-4. Class 900
(1)(2)
Nominal
Pipe Size Bore B
Diameter
of
Pressure
Conn-
ection TT
Drilling Template
Diameter of
Bolts
Length of Stud Bolts
(3)(4) (5)
Bolt Circle
Number of
Holes
Diameter of Holes
Raised Face Ring Joint
Raised
Face Ring Joint
1
1
/
4
3.50 4 0.69 0.75
5
/
8
5.00 5.50
1
1
/
2
1
/
4
4.50 4 0.81 0.88
3
/
4
5.25 5.50
2
1
/
4
5.00 8 0.69 0.75
5
/
8
5.00 5.50
2
1
/
2
1
/
4
5.88 8 0.81 0.88
3
/
4
5.25 5.75
3
3
/
8
6.62 8 0.81 0.88
3
/
4
5.25 5.75
4
1
/
2
8.50 8 1.00 1.00
7
/
8
6.00 6.50
6
1
/
2
11.50 12 1.12 1.12 1 7.00 7.50
8
1
/
2
13.75 12 1.25 1.25 1
1
/
8
7.75 8.25
10
1
/
2
17.00 16 1.38 1.38 1
1
/
4
8.75 9.25
12
1
/
2
19.25 20 1.38 1.38 1
1
/
4
9.00 9.50
14
1
/
2
20.75 20 1.50 1.50 1
3
/
8
9.50 10.00
16
1
/
2
23.75 20 1.62 1.62 1
1
/
2
10.25 10.75
18
1
/
2
25.75 20 1.75 1.75 1
5
/
8
11.00 11.50
20
1
/
2
28.50 24 1.75 1.75 1
5
/
8
11.75 12.50
24
1
/
2
33.00 24 2.00 2.00 1
7
/
8
13.25 13.75
(1) Weld neck flanges NPS 3 and smaller are identical to Class 300 flanges except for bolting and may be used for such service.
(2) All other dimensions are in accordance with ASME B16.5.
(3) 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.
(4) In conformance with ASME B16.5, stud bolt lengths do not include point heights.
(5) Bore is to be specified by the purchaser.
See Note
(5
)
.
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