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Material the Tank Shell, Roof & Bottom as per Drg. No. MHIL\2103\A1\M\220-I, Rev-3 : IS 2062, Gr. A Out Side Diameter of the tank at annular plate = I
II
13560
APPENDIX B - EVALUTION OF SHELL SETTLEMENT AS PER CLAUSE NO. B.2.2.4 & B.3.2 Y = Yield Strength = Height of 250 Mpa = 36259 PSI 12200.0 the Tank = E = Young's Modulas = 200000 MPa = 28880000 PSI 40.0
mm
44.488
Foot
III
IV
4.4488 Number of Data Point (Settlements measured point) as per Clause No. 12.5.1.2,API 653, 2003 = N = D /10 =
V
VI
VII
VIII
Nos.
5
Nos.
IX
X
Circumfirence = 139.8200 Radial Distance = L = Arc Length XI
Foot
27.9640
Foot
XII
XIII
Constant Sr. Degre No. e
Elevpred = a+ b x cos(θ +c)
Radian a
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1
0 15 30 45 60 75 90 105 120 135 150 165 180 195 210 225 240 255 270 285 300 315 330 345 360
0.00000 7.31500 0.26190 7.31500 0.52381 7.31500 0.78571 7.31500 1.04762 7.31500 1.30952 7.31500 1.57143 7.31500 1.83333 7.31500 2.09524 7.31500 2.35714 7.31500 2.61905 7.31500 2.88095 7.31500 3.14286 7.31500 3.40476 7.31500 3.66667 7.31500 3.92857 7.31500 4.19048 7.31500 4.45238 7.31500 4.71429 7.31500 4.97619 7.31500 5.23810 7.31500 5.50000 7.31500 5.76190 7.31500 6.02381 7.31500 6.28571 7.31500 Verification
b
c
0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 0.01700 7.331969
3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 3.20100 7.298
7.29803 7.29887 7.30081 7.30372 7.30740 7.31159 7.31602 7.32038 7.32437 7.32772 7.33021 7.33166 7.33197 7.33112 7.32918 7.32627 7.32259 7.31839 7.31396 7.30960 7.30561 7.30226 7.29978 7.29834 7.29803 0.034
Measured Elevation in Metre
7.297 7.296 7.299 7.302 7.306 7.317 7.321 7.325 7.327 7.329 7.334 7.335 7.336 7.335 7.331 7.325 7.316 7.322 7.304 7.302 7.299 7.295 7.296 7.295 7.297 7.295
Avg Measured Elevation in metre
(VIII - VII)2
Syy
(VII - VI)2
SSE
7.31364 0.00028 0.00000 7.31364 0.00031 0.00001 7.31364 0.00021 0.00000 7.31364 0.00014 0.00000 7.31364 0.00006 0.00000 7.31364 0.00001 0.00003 7.31364 0.00005 0.00002 7.31364 0.00013 0.00002 7.31364 0.00018 0.00001 7.31364 0.00024 0.00000 7.31364 0.00041 0.00539 0.00001 0.00050 7.31364 0.00046 0.00001 7.31364 0.00050 0.00002 7.31364 0.00046 0.00002 7.31364 0.00030 0.00000 7.31364 0.00013 0.00000 7.31364 0.00001 0.00004 7.31364 0.00007 0.00001 7.31364 0.00009 0.00010 7.31364 0.00014 0.00006 7.31364 0.00021 0.00004 7.31364 0.00035 0.00005 7.31364 0.00031 0.00001 7.31364 0.00035 0.00001 7.31364 0.00028 0.00000 Loest point [ of the Actual settlement Curve] Highest point
The Max. Permisible Out of Plane Deflection = I S I ≤(L2 x Y x 11)/(2(E x H))
mm Foot
R2 = (Syy SSE) Syy
0.907
7.336
< 32 Foot as per code
XIV Magnitude of the Out-ofplane Sattlements= Ui, in Metre
Data Point Taken / Radial Distance
24
Nos.
1.854
Foot
XV The Out-of-plane Deflection= Si
For Draw the Optimum Cosine Curve
XVI I S I in Foot
ABS Value In 0.135 In Metre mm (I Si I) -0.00103 0.00154 1.54 -0.00287 -0.00149 1.49 -0.00181 -0.00060 0.60 -0.00172 -0.00299 2.99 -0.00140 -0.00298 2.98 0.00541 0.00396 3.96 0.00498 0.00436 4.36 0.00462 0.00128 1.28 0.00263 -0.00176 1.76 0.00128 -0.00271 2.71 0.00379 0.00046 0.46 0.00334 0.00077 0.77 0.00403 0.00122 1.22 0.00388 0.00284 2.84 0.00182 0.00310 3.10 -0.00127 -0.00501 5.01 -0.00659 -0.00252 2.52 0.00361 0.00805 8.05 -0.00996 -0.00336 3.36 -0.00760 -0.00578 5.78 -0.00661 0.00026 0.26 -0.00726 -0.00179 1.79 -0.00378 0.00004 0.04 -0.00334 0.00081 0.81 -0.00103 0.00229 2.29 Difference between Lowest & Highest point in mm =
Note: (I) Elevations are Measured by SSE. (II) As per Visual inspection ignore EDGE SETTLEMENT Clause No. B.2.3, B.2.4 & B.3.4. (III) Evalution As per Clause No. B.3.3 discussed in another sheet. (IV) Graphical Representation of tank settlement as per Figure B-3 attached.
I S I in mm
41.12 ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble ≤ 41.2 mm, So accepteble 41.000
Graphical Representation of Tank Shell Settlement: Figure B-3, API 653, 2003 1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
7.350 9
N (24) data points, Equally (L) spaced apart.
7.340 U13 U12
U14
7.320 Plane of rigid tilt represented by Optimum Cosine Curve Plane of rigid tilt represented by Optimum Cosine Curve
7.310
Actual edge / Shell settlement
7.300
Actual edge / Shell settlement
Datum line for adjusted settlement, 7.295 mtrs.
7.290
Tank Circumference Envelope (Pi x D) / Degree Actual Measurement Elevation
N (24) data points
Datum line for adjusted settlement
Predicted Cosine Curve
360
345
330
315
300
285
270
255
240
225
210
195
180
165
150
135
120
105
90
75
60
45
30
15
7.280
0
Elevation Actual / Predicted
7.330