Page 150 - GarlockFluidSealing2010

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D-32
Effective Gasket Seating Width
1a
1b*
1c
1d*
2
3
4*
5*
6
Basic Gasket Seating Width, B
0
Flange and Gasket
Column 1
Column 2
Diagram
(Solid fat metal and
(Spiral wound, metal
ring joint gaskets)
jacketed, corrugated metal,
grooved metal gaskets)
W = N
W = N
W = N
2
W = N
2
N
2
.
N
2
.
N
4
.
7N
16
.
3N
8
...
3N
8
...
3N
8
...
N
4
.
W
8
.
W+N
4
W+3N
8
W+T
2
W+N
4
[
max.
]
W+T
2
W+N
4
[
max.
]
N = Width of gasket
W = Width of contact area
(raised face or serrations)
T = Thickness of gasket
B
0
= Basic seating width of gasket
B
1
= Effective seating width of gasket
B
1
= B
0
if B
0
= 1/4";
B
1
= (vB
0
)/ 2 if B
0
> 1/4"
* Where serrations do not exceed 1/64" depth and 1/32" spacing,
choose 1b or 1d.
,
,
For B
0
> 1/4" For B
0
= 1/4"
H
G
= Gasket load reaction force
G = Diameter of gasket load reaction force
h
G
= Distance from G to bolt circle diameter