COMMISSIONING
Part No.: 4417340 Revision 1 Service Manual 243
954 SmartServo FlexLine
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]
Wall thickness
[mm]
1 2.743 38.1
2 2.390 36.2
3 2.393 28.9
4 2.390 24.7
5 2.390 20.5
6 2.393 16.3
7 2.390 12.2
8 2.390 11.8
9 2.466 9.5
The local gravity constant is taken as: 9.81288 m/s
2
The deformation per ring is (refer to Figure 7-42 for the calculation of
the ullage values per ring):
][...
.
.
..
..
mm190121640x10x02343
10x59
4662
x
10x1206x33x4
812889x1000x8283
h
7
3
2
9
9ring
==
=δ
−
−
−
][.
.
..
. mm450
10x811
46628564
x10x02343h
3
22
7
8ring
=
−
=δ
−
−
−
][.
.
..
. mm720
10x212
85642467
x10x02343h
3
22
7
7ring
=
−
=δ
−
−
−
][.
.
..
. mm750
10x316
24676399
x10x02343h
3
22
7
6ring
=
−
=δ
−
−
−
][.
.
..
. mm760
10x520
639902912
x10x02343h
3
22
7
5ring
=
−
=δ
−
−
−
][.
.
..
. mm770
10x724
0291241914
x10x02343h
3
22
7
4ring
=
−
=δ
−
−
−
][.
.
..
. mm780
10x928
4191481216
x10x02343h
3
22
7
3ring
=
−
=δ
−
−
−
][.
.
..
. mm720
10x236
8121620219
x10x02343h
3
22
7
2ring
=
−
=δ
−
−
−
][.
.
..
. mm900
10x138
2021994521
x10x02343h
3
22
7
1ring
=
−
=δ
−
−
−