Kistler-Morse KM L-Cell Bolt-On - Manual (Page 47)

Chapter 5. L-Cell Installation on Skirt-Supported Vessels
5-10
See Figure 5-14. Minor obstructions may occur near the top or bottom of
a tier. The effective tier height is the distance between the edge of the tier
and the minor obstruction. If the effective tier height is 2.6’ (0.8m) or
greater, modify the vertical location of the L-Cell set so the set is at the
center of the effective tier height. If the effective tier height is less than
2.6’ (0.8m), relocate the L-Cell set as shown in Figure 5-15.
Figure 5-14. Modifying L-Cell Vertical
Locations because of Minor Obstructions
Near Tier Edge
Note: Minimum effective tier height is 2.6’ (0.8m).
If effective height is less than 2.6’ (0.8m), relocate
L-Cell set to another location.
Modified Location to
Center L-Cells within
Effective Tier Height
(at this point only)
3.5’
(1.1m)
12
12
12
12
12
12
12
12
Effective
Tier
Height
7.0’ (2.1m)
2” to 4”
(51mm to 102mm) Diameter
Pneumatic Tubes through Tier
4.0’
(1.2m)
Tier
Height
8.0’
(2.4m)
‘Ideal’ Locations
Mount L-Cells
1.3’ (0.4m) from
Major Obstruction
Figure 5-12. Mounting L-Cells in Alternate
Locations because of Major Obstructions
14’-9” (4.5m)
Diameter
Typical Layout
14’-9” (4.5m) Diameter
Modified Layout because
of Major Obstruction
Do not install L-Cells within 1.3’ (0.4m) of major
obstruction. Install as shown on Modified layout below.
Major Obstruction
at Ideal Location
for an L-Cell Set
Mount L-Cells
1.3’ (0.4m)
from Major
Obstruction
Figure 5-15. Mounting L-Cells on Second Tier
First
Tier
Second
Tier
Must have
enough room to
work inside
2.6’ (0.8m) Minimum
Height between
Seam Welds or
Bolt Lines
Center L-Cells
Vertically between
Seam Welds or
Bolt Lines
Many Obstructions
in First Tier
Cone
Obstructions can be classified as major or minor:
•
Figure 5-12 shows an example of a major obstruction. Do not place an
L-Cell set within 1.3’ (0.4m) of a major obstruction.
• Figure 5-13 shows an example of a minor obstruction. Do not place an
L-Cell set within 0.7’ (0.2m) of a minor obstruction — less than 4”
(102mm) in size.
Figure 5-13. Mounting L-Cells in Alternate
Locations because of Minor Obstructions
Maintain 0.7’ (0.2m) Minimum
Distance between L-Cells and
Minor Obstruction (seam weld)
Modified Location to
Avoid Placement
of L-Cells near
Minor Obstruction
‘Ideal’ Locations, based
on Symmetrical Spacing
Seam
Weld
r u c t
Obstructions
(Aluminum)