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COMMISSIONING
Part No.: 4417340 Revision 1
If the rings have a different plate thickness, each ring must be
calculated individually, where a and b are the distance of the top and
bottom welding seam of each individual ring with respect to the liquid
surface.
Below follows an example of a calculation for a steel storage tank,
diameter 83.82 m, product density of 1000 kg/m3, with the ring heights
and wall thickness as per following:
Example of tank ring measures
Ring no.
Ring height
[m]
1
2.743
2
2.390
3
2.393
4
2.390
5
2.390
6
2.393
7
2.390
8
2.390
9
2.466
The local gravity constant is taken as: 9.81288 m/s
The deformation per ring is (refer to
the ullage values per ring):
83
.
82
x
1000
δ
=
h
−
ring
9
4
x
3
.
3
x
=
3
.
0234
x
10
δ
=
h
3
.
0234
x
10
ring
−
8
δ
=
h
3
.
0234
x
10
−
ring
7
δ
=
h
3
0234
x
10
.
−
ring
6
δ
=
h
3
.
0234
x
10
ring
−
5
δ
=
h
3
.
0234
x
10
ring
−
4
δ
=
h
3
.
0234
x
10
−
ring
3
δ
=
h
3
0234
x
10
.
−
ring
2
δ
=
h
3
.
0234
x
10
ring
−
1
Service Manual
954 SmartServo FlexLine
Wall thickness
[mm]
38.1
36.2
28.9
24.7
20.5
16.3
12.2
11.8
9.5
Figure 7-42
x
9
.
81288
2
.
466
x
9
206
.
1
x
10
9
.
5
x
10
−
7
=
x
640
.
121
0
.
19
[
mm
2
2
−
4
856
2
466
.
.
−
7
=
x
−
3
11
8
x
10
.
2
2
−
7
.
246
4
.
856
−
7
=
x
−
3
12
.
2
x
10
2
2
−
9
.
639
7
.
246
−
7
=
x
−
3
16
.
3
x
10
2
2
−
12
.
029
9
.
639
−
7
x
−
3
20
.
5
x
10
2
2
−
14
419
12
029
.
.
−
7
x
−
3
24
7
x
10
.
2
2
−
16
.
812
14
.
419
−
7
x
−
3
28
.
9
x
10
2
2
−
19
.
202
16
.
812
−
7
x
−
3
36
.
2
x
10
2
2
21
945
−
19
202
.
.
−
7
x
−
3
38
.
1
x
10
2
for the calculation of
2
−
3
]
0
.
45
[
mm
]
0
.
72
[
mm
]
0
75
mm
.
[
]
=
0
.
76
[
mm
]
=
0
.
77
[
mm
]
=
0
.
78
[
mm
]
=
0
72
mm
.
[
]
=
0
.
90
[
mm
]
243
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