LIFT ANALYSIS

L2(liftig lug to vessel C.G.) 15000 mm

L3(Vessel C.G. to tailing lug) 15000 mm

L1=L2+L3 30000 mm

L4(Vessel center line to tailing lug hole) 2000 mm

WO (Erection weight) 320000 kg

Impact factor 1.5

W(with Impact Factor) 480000 kg

AXIS REACTION

TAILING LUG LIFTING LUG / TRUNION

DEG SIN (ø) COS(ø) TAIL (T) TOTAL LIFT (P) TOTAL

0 0.000 1.000 240000 240000 0 240000 240000 120000 0 120000

5 0.087 0.996 238608 237700 20796 238608 241392 120237 10519 120696

10 0.174 0.985 237212 233608 41191 237212 242788 119550 21080 121394

15 0.259 0.966 235788 227754 61026 235788 244212 117945 31603 122106

20 0.342 0.940 234314 220184 80140 234314 245686 115434 42015 122843

25 0.423 0.906 232764 210956 98370 232764 247236 112036 52243 123618

30 0.500 0.866 231105 200143 115552 231105 248895 107775 62224 124448

35 0.574 0.819 229296 187829 131519 229296 250704 102682 71899 125352

40 0.643 0.766 227286 174111 146096 227286 252714 96795 81221 126357

45 0.707 0.707 225000 159099 159099 225000 255000 90156 90156 127500

50 0.766 0.643 222335 142914 170319 222335 257665 82812 98691 128832

55 0.819 0.574 219136 125691 179506 219136 260864 74813 106844 130432

60 0.866 0.500 215156 107578 186331 215156 264844 66211 114681 132422

65 0.906 0.423 209980 88741 190306 209980 270020 57058 122361 135010

70 0.940 0.342 202846 69377 190613 202846 277154 47396 130220 138577

75 0.966 0.259 192184 49741 185635 192184 287816 37246 139004 143908

80 0.985 0.174 174155 30242 171509 174155 305845 26555 150599 152923

85 0.996 0.087 136209 11871 135690 136209 343791 14982 171242 171896

90 1.000 0.000 0 0 0 0 480000 0 240000 240000

MAX. 240000 240000 190613 480000 120237 240000kg kg kg kg kg kg

RADIAL (fr)

AXIAL (fL)

TANGENTIAL

(PT)

AXIAL (PL)

CALCULATION OF CENTROID AND MOM OF INERTIA OF A SKIRT ANCHOR CHAIR

Lg 180tb 50Dsk 5528tsk 14

lr=(lg-tb)+0.55*(Dsk*tsk)^ 283Lr 500

depth Area a*y h^2 a*h^2

1 19 85 1.62E+03 42.5 6.86E+04

107.88

65.38 4275 6.90E+06 9.72E+052 500 10 5.00E+03 90 4.50E+05 17.88 320 1.60E+06 4.17E+043 38 115 4.37E+03 152.5 6.66E+05 44.62 1991 8.70E+06 4.82E+06

210 1.10E+04 1.19E+06 1.72E+07 5.83E+06

CENTROID = C1 107.88C2 102.12

Moment of Inertia =Ig sum 5.83E+06

Ixs= sum of Ig+ sum of a*h^2 2.30E+07

Sec. modulus 1= Ixs/C1 213500Sec. modulus 2= Ixs/C2 225543

all Dimensions are in mm

Area Mark

Breadth

Y dist.from

base

C1=(Sa*y)/Sa

h dist.from centroid

Ig= b*d^3/12

BOLD indicate input

CALCULATION OF CENTROID AND MOM OF INERTIA OF A SKIRT ANCHOR CHAIR

Lg 162tb 32Dsk 5528tsk 14

lr=(lg-tb)+0.55*(Dsk*tsk)^0 283Lr 500

Breadth depth Area a*y

1 19 115 2185 57.5 1.256E+05

159.68

102.182 19 115 2185 57.5 1.256E+05 102.183 500 10 5000 120 6.000E+05 37.684 19 85 1615 167.5 2.705E+05 7.825 28 250 7000 250 1.750E+06 35.32

575 17985 2.872E+06

CENTROID = C1 159.68C2 215.32

Moment of Inertia =Ig sum 42288468.8

Ixs= sum of Ig+ sum of a*h^2 103842357.0

Sec. modulus 1= Ixs/C1 650328Sec. modulus 2= Ixs/C2 482263

all Dimensions are in mm

Area Mark

Y dist.from base

C1=(Sa*y)/Sa

h dist.from centroid

BOLD indicate input

CALCULATION OF CENTROID AND MOM OF INERTIA OF A SKIRT ANCHOR CHAIR

h^2 a*h^2

10440.10 2.281E+07 2.408E+0610440.10 2.281E+07 2.408E+061419.54 7.098E+06 4.167E+0461.20 9.884E+04 9.724E+05

1247.73 8.734E+06 3.646E+076.155E+07 4.229E+07

Ig= b*d^3/12

BASE RING for three point(Refer Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.)

MATERIAL :Ys - YIELD STRESS

MATERIAL : SA 285 GR CYs - YIELD STRESS 2109 kg/cm²

Sba - ALLOW.BENDING STRESS = 0.66 x Ys 1391.94 kg/cm²F2 - MAXIMUM LOAD (in horiz. position) : 16198 kgZ - SECTION MODULUS OF BASE RING+SKIRT 213500 mm3

Di - INSIDE DIAMETER OF BASERING 2830 mmRm - MEAN RADIUS OF SECTION 1625 mm

BM - MAX.BENDING MOMENT PRODUCED AROUND RING F2 x Rm x 0.0229(0.0229 = Internal moment Coefficient for Base Ring for 3 point lifting at Zero deg)

602768 kg-mmBENDING STRESS IN BASE RING = BM / Z 282.33 kg/cm²

SAFE HENCE BASE RING IS SAFE WITH ADDITIONAL STIFFENING BEAM.

CHECK FOR SUFFICIENCY OF BRACING BEAMSTIFFNER BEAMS PROVIDED AS INDICATED ABOVE WITH THE TAILING LUGMATERIAL : SA 36TAILING BEAM SIZE SEL H 200*200*12*12 YIELD (Ys): 2530 kg/cm²ALLOW.BENDING STRESS (Sba = 0.66 1669.8 kg/cm²SECTION MODULUS OF BEAM : 479221.76 mm3SECTION MODULUS OF BEAM (Z) : 479221.76 mm3

MAXIMUM LOAD F2 : (0.453*T) FOR 3 BEAM CO 7337.69 kgL : 200 mmMAX.BENDING STRESS (F2*L/Z) : 306.23 kg/cm2

safeHENCE BRACING BEAM OF HE 200 B OR OF EQUIVALENT IS PROVIDED.

Skirt Bracing

Tailing Lug

Rm

Dist from N.Axis from CL

T

BASE RING for two point(Refer Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.)

MATERIAL :Ys - YIELD STRESS

MATERIAL : SA 285 GR CYs - YIELD STRESS 2109 kg/cm²

Sba - ALLOW.BENDING STRESS = 0.66 x Ys 1391.94 kg/cm²F2 - MAXIMUM LOAD (in horiz. position) : 31290 kgZ - SECTION MODULUS OF BASE RING+SKIRT 650328 mm3

Di - INSIDE DIAMETER OF BASERING 5630 mmRm - MEAN RADIUS OF SECTION 3025 mm

BM - MAX.BENDING MOMENT PRODUCED AROUND RING F2 x Rm x 0.0795(0.0795 = Internal moment Coefficient for Base Ring for 2 point lifting at Zero deg)

7524854 kg-mmBENDING STRESS IN BASE RING = BM / Z 1157.09 kg/cm²

SAFE HENCE BASE RING IS SAFE WITH ADDITIONAL STIFFENING BEAM.

CHECK FOR SUFFICIENCY OF BRACING BEAMSTIFFNER BEAMS PROVIDED AS INDICATED ABOVE WITH THE TAILING LUGMATERIAL : SA 36TAILING BEAM SIZE SELECTED H 250*250*9*14 YIELD (Ys): 2530 kg/cm²ALLOW.BENDING STRESS (Sba = 0.66 Ys) : 1669.8 kg/cm²SECTION MODULUS OF BEAM : 846305 mm3SECTION MODULUS OF BEAM (Z) : 846305 mm3

MAXIMUM LOAD F2 : (0.5*T) FOR 1 BEAM CONST 15645.00 kgL : 250 mmMAX.BENDING STRESS (F2*L/Z) : 462.16 kg/cm2

safeHENCE BRACING BEAM OF HE 200 B OR OF EQUIVALENT IS PROVIDED.

Skirt Bracing

Tailing Lug

Rm

Dist from N.Axis from CL

T

BASE RING ADEQUACY (For One Point)(Refered Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.)

MATERIAL :Ys - YIELD STRESSSba - ALLOW.BENDING STRESS = 0.66 x YsF2 - MAXIMUM LOAD (in horiz. position) :Z - SECTION MODULUS OF BASE RING+SKIRTDi - INSIDE DIAMETER OF BASERINGRm - MEAN RADIUS OF SECTIONBM - MAX.BENDING MOMENT PRODUCED AROUND RING

(0.2387 = Internal moment Coefficient for Base Ring for One point lifting at Zero deg)BM =

BENDING STRESS IN BASE RING = BM / Z

HENCE BASE RING IS UNSAFE WITHOUT ADDITIONAL STIFFENING BEAM

Tailing Lug T

(For One Point)(Refered Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.)

IS 2062 GR B2249 kg/cm²

1484.34 kg/cm²86274 kg

766398 mm33640 mm

1111.45 mm F2 x Rm x 0.2387

(0.2387 = Internal moment Coefficient for Base Ring for One point lifting at Zero deg)22888761 kg-mm

2986.54 kg/cm²UNSAFE

HENCE BASE RING IS UNSAFE WITHOUT ADDITIONAL STIFFENING BEAM

CALCULATION FOR LIFTING FORCES FOR RIGGING

WO (Erection weight) 320000 kgImpact factor 2

640000 kgCG(distance from bottom) 15000 mmDistance between tail lug hole to bottom 100 mmDistance between lift lug hole to bottom 30000 mmDistance from C.G. to tailing lug hole (L3) 14900 mmDistance from lifting lug hole to C.G. (L2) 15000 mmDistance from vessel centerline to tailing lug hole (L4) 2000 mmDistance between lifting lug hole to tailing lug hole (L1) 29900 mm

FORCE WHILE LIFTING

LL (P) TL (T)

0 0.000 1.000 318930 318930 0 321070 321070 0

5 0.087 0.996 320798 319577 27959 319202 317988 27820

10 0.174 0.985 322672 317770 56031 317328 312507 55103

15 0.259 0.966 324583 313523 84008 315417 304669 81636

20 0.342 0.940 326561 306867 111690 313439 294537 107203

25 0.423 0.906 328641 297850 138890 311359 282187 131586

30 0.500 0.866 330868 286540 165434 309132 267716 154566

35 0.574 0.819 333295 273019 191170 306705 251238 175919

40 0.643 0.766 335993 257385 215972 304007 232883 195412

45 0.707 0.707 339060 239751 239751 300940 212797 212797

50 0.766 0.643 342635 220241 262473 297365 191143 227795

55 0.819 0.574 346927 198989 284186 293073 168100 240072

60 0.866 0.500 352266 176133 305071 287734 143867 249185

65 0.906 0.423 359208 151808 325553 280792 118668 254484

70 0.940 0.342 368775 126128 346535 271225 92764 254868

75 0.966 0.259 383069 99146 370016 256931 66499 248176

80 0.985 0.174 407231 70715 401044 232769 40420 229233

85 0.996 0.087 458044 39921 456301 181956 15858 181263

90 1.000 0.000 640000 0 640000 0 0 0

MAX. 640000 319577 640000 321070 321070 254868

WL (with impact factor)

ϴ (DEG) SIN(ϴ) COS(ϴ) LV (PT) LH (PL) TV (fr) TH (fL)=Pcosϴ =Psinϴ =Tcosϴ =Tsinϴ

STRESSES WHILE LIFTINGWO (Erection weight) 320000 kg

Impact factor 2

640000 kg

CG(distance from bottom) 7500 mm

Distance between tail lug hole to bottom 100 mm

Distance between lift lug hole to bottom 14750 mm

Distance from C.G. to tailing lug hole (L3) 7400 mm

Distance from lifting lug hole to C.G. (L2) 7250 mm

Distance from vessel centerline to tailing lug hole (L4) 2800 mm

Distance between lifting lug hole to tailing lug hole (L1) 14650 mm

w 42.67 kg/mmL (dist. Of top of the vessel to mid of the span) 7500 mmH (Height of the vessel) 15000 mmAllowable bending stress in shell 1764 kg/cm²Allowable tensile stress in shell 1406 kg/cm²Do (vessel OD) 5010 mmDi (vessel ID) 5000 mmZ 9.83E+07 mm^3A 78618 mm^2

LL (P) TL (T) Sb Sac Sat Sc St Bend st

0 0.000 1.000 323276 323276 0 316724 316724 0 11.884 0.000 0.000 11.884 11.884 11.639

5 0.087 0.996 328485 327235 28629 311515 310329 27150 12.226 0.345 0.364 12.571 12.590 11.985

10 0.174 0.985 333602 328534 57929 306398 301743 53205 12.462 0.677 0.737 13.138 13.199 12.233

15 0.259 0.966 338706 327165 87664 301294 291027 77981 12.590 0.992 1.115 13.582 13.705 12.381

20 0.342 0.940 343876 323138 117613 296124 278265 101280 12.610 1.288 1.496 13.899 14.106 12.428

25 0.423 0.906 349194 316477 147576 290806 263560 122900 12.522 1.563 1.877 14.085 14.399 12.372

30 0.500 0.866 354753 307225 177376 285247 247032 142624 12.324 1.814 2.256 14.138 14.580 12.214

35 0.574 0.819 360660 295435 206866 279340 228822 160223 12.018 2.038 2.631 14.056 14.649 11.953

40 0.643 0.766 367050 281177 235935 272950 209091 175449 11.603 2.232 3.001 13.835 14.604 11.591

45 0.707 0.707 374097 264527 264527 265903 188022 188022 11.082 2.392 3.365 13.474 14.447 11.127

50 0.766 0.643 382035 245567 292656 257965 165817 197613 10.454 2.514 3.722 12.968 14.177 10.562

55 0.819 0.574 391191 224378 320445 248809 142711 203813 9.720 2.592 4.076 12.312 13.796 9.895

60 0.866 0.500 402048 201024 348184 237952 118976 206072 8.878 2.621 4.429 11.499 13.307 9.126

65 0.906 0.423 415353 175536 376438 224647 94940 203599 7.923 2.590 4.788 10.513 12.711 8.247

70 0.940 0.342 432328 147865 406256 207672 71028 195148 6.845 2.482 5.167 9.327 12.012 7.246

75 0.966 0.259 455138 117798 439629 184862 47846 178563 5.620 2.271 5.592 7.891 11.212 6.093

80 0.985 0.174 488016 84743 480602 151984 26392 149675 4.196 1.904 6.113 6.100 10.309 4.716

85 0.996 0.087 540545 47112 538488 99455 8668 99077 2.447 1.260 6.849 3.707 9.297 2.917

90 1.000 0.000 640000 0 640000 0 0 0 0.000 0.000 8.141 0.000 8.141 0.000

MAX. 640000 328534 640000 316724 316724 206072 12.610 2.621 8.141 14.138 14.649 12.428

Maximum Bending stress = 1242.8 kg/cm² Safe

Maximum stress = 1464.9 kg/cm² Unsafe

WL (with impact factor)

ϴ (DEG) SIN(ϴ) COS(ϴ) LV (PT) LH (PL) TV (fr) TH (fL)

=Pcosϴ =Psinϴ =Tcosϴ =Tsinϴ

LIFTING LUG CALCULATIONSCalculation based on Procedure 7-6 of Vessel Design Manual by Moss

Erection Weight (Kg) 7550Impact factor for Lifting 1.4Total Lifting Wt. (Kg) 10570No. of Lifting Lug 2Load on one Lifting lug PL (Kg) 5285LUG DIMENSIONS

C = (mm) 572

D = (mm) 98R = (mm) 165T = (mm) 40E = (mm) 145

f =(mm) 427b+a+H = (mm) 455H = (mm) 305A = (mm) 405B = (mm) 735W = (mm) 635

Bearing pad Diameter (S) = (mm) 205Bearing Pad THK (t) = (mm) 40

a = (mm) 50b = (mm) 75

Lifting Lug Material SA 516 GR 70Yield Strenght at Room Temp Sy = 2672 kg/cm²Code Allowable Stress Sa = 1406Allowable Tensile ( St ) Sa 1406 kg/cm²Allowable Bearing 0.8 Sy 2137.6 kg/cm²Allowable Shear 0.4 Sy 1068.8 kg/cm²Allowable Bending Stress 0.66 Sy 1763.52 kg/cm²

INDUCED STRESSES IN LIFTING LUGTensile str area of Lug [ 2R - D] x T 9280 mm²Tensile Stress Induced 56.95 kg/cm² SAFEBearing Area = D x (T + 2t) 24600.00 mm²Bearing Stress Induced 21.48 kg/cm² SAFEShear Area 2T x (√[R² - (D/2)²]) 12604.51 mm²Shear Stress Induced 41.93 kg/cm² SAFE

Max Load normal at Lifting Lug (PT) = 45623 Kg(Refer Calculated Max Load during lifting)Maximum Moment Arm (L2=C+b) 647 mmBending Moment (M=P*L2) 29518081 kg-mmSec Modulus 2688167 mm3Bending Stress Induced 1098.07 kg/cm² SAFE

WELD CHECKAllowable Weld Shear 0.55*Sa= 773.30 kg/cm²

CHECKING LUG WELDSLocation of CG (Long) from bot of lug (c ) = 74.72 mm

c=(H^2/(W+2*H))Polar Moment of Inertia (Jw) = 94793495.36 mm3Jw=((W+2*H)^3/12)-(H^2(W+H)^2/(W+2H))

Finding Shear Loads on Weldi) Transverse Shear due to P (f1) = 23.34 Kg/mmf1 = P / (2*H + 2*H + W+2*a)ii) Transverse Shear due to M (f2) = 102.77 Kg/mmf2 = [(C+b+a+H-c)*P*(H-c)] / Jw iii) Longitudinal Shear due to M (f3) = 136.12 Kg/mmf3 = (C+b+a+H-c)*P*H/Jwiv) Combined Load (fc) = 185.56 Kg/mmfc = sqrt ((f1+f2)^2+f3^2)

Fillet Size 34 mmThroat unit area (w) 24.04 mmMaximum Shear Stress = fc / w 771.82 kg/cm² SAFEHence Provided Leg to Pad/ Shell fillet size is safe

CHECKING PAD WELDSMaximum Moment Arm (L1=C+b+0.5A) = 849.5 mmBending Moment (M1=P*L1) = 38756739 kg-mmPolar Moment of Inertia (Jw=(A+B)^3/6) = 246924000.00 mm3Lifting Lug pad thickness = 28 mmFinding Shear Loads on Weldi) Transverse Shear due to P (f1) = 20.01 Kg/mmf1 = P / (2*A + 2*B)ii) Transverse Shear due to M (f2) = 31.78 Kg/mmf2 = 0.5*M1*A / Jw iii) Longitudinal Shear due to M (f3) = 63.57 Kg/mmf3 = M1*A/Jwiv) Combined Load (fc) = 82.00 Kg/mmfc = sqrt ((f1+f2)^2+f3^2)

Fillet Size 20 mmThroat unit area (w) 14.14 mmMaximum Shear Stress = fc / w 579.81 kg/cm² SAFEHence Provided Leg to Pad/ Shell fillet size is safe

LOCAL LOADS kg / kg-mm N / N-mVessel is horizontal position : MT = [ H+F+E-(h2/2) ]xP 39897314 391261

FC = P 45623 447412Vessel is vertical position : FL = PL 7550 74041

TAILING LUG ANALYSIS

LOADS CASE A CASE B MAX BENDING MAX TENSION

WITH IMPACT

AXIAL LOAD / TAILING LUG Kg 68192RADIAL LOAD / TAILING LUG Kg 84182(Refer calculated maximum reaction values in lifting analysis)

TAILING LUG CALCULATION:MATERIAL: IS 2062 GR B Sa = 1049 kg/cm²

TENSILE

ALLOWABLE STRESS ( kg/cm² ) 2249 1049 899.6 1484.34 576.95

TAILING LUG DIMENSIONS: (…mm)(MIN.) H - DEPTH 284

M - MOMENT ARM 92D - PIN HOLE DIA 75

T - THK. 32R - RADIUS OF TAILING LUG 142

D' - DIAMETER OF BEARING PAD 150T' - THK OF BEARING PAD 16

CHECK ON SEC 'AA' IN TENSION: (LOAD CASE B)WIDTH mm 284THK mm 32AREA mm² 18176

STRESS: kg/cm² 463.15 safe

CHECK ON SEC 'BB' IN SHEAR: (LOAD CASE B)

  

YEILD STRESS (Sy)

SHEAR (0.4 * Sy)

BENDING (0.66 *

Sy)WELD SHEAR

(0.55*Sa)

H

M (When no continuous ring)

 

D

R

B

A

AC

B

C

`

M

C

SEC. WIDTH ( w' ) mm 136.96THK ( T + 2 * T' ) mm 64AREA ( 2 x w' x (T + 2 * T' ) mm² 17530.74

STRESS: kg/cm² 480.20 safe

CHECK ON PIN HOLE BEARING AREA (LOAD CASE B)WIDTH mm 75THK (T + 2 * T' ) mm 64PROJECTED AREA mm² 4800

STRESS: kg/cm² 1420.67 safeALLOWABLE STRESS (0.8 x Sy) kg/cm² 1799.2

CHECK ON SEC 'CC' IN BENDING: (LOAD CASE A)DEPTH mm 284WIDTH mm 64MOMENT ARM mm 92AREA mm² 18176

SECTION MODULUS 860330.666667BENDING MOMENT kg-mm 6273664BENDING STRESS kg/cm² 729.22TENSILE STRESS kg/cm² 463.15

TOTAL STRESS kg/cm² 1192.36 safe

TAILING LUG WELD CHECKING

TAILING LUG HEIGHT @ SKIRT WELD H1 284 mmBASERING O/D Db 3630 mmSKIRT O/D Ds 3250 mm

LENGTH OF WELD ON ONE SIDE 474 mmTOTAL LENGTH OF WELD L = 2 x L1 948 mm

WELD FILLET SIZE f 14 mmTHROAT AREA OF FILLET w f / SQRT(2) 9.90 mmTOTAL AVAILABLE AREA OF WELD A w x L 9384.72119991 mm²

LOAD ON TAILING LUG WD 84182 Kg

ALLOWABLE SHEAR STRESS IN WELD Ssa = 0.4 x Sy 899.6 Kg/cm² (Eq. to Tailing Lug Material.)

REQUIRED AREA OF WELD :

LOAD CASE 'D' Ar WD/Ssa 9357.7145398 mm² safe

Therefore weld provided between Tailing Lug & Skirt is safe.

mm3

Tailing Beam if req

0.932787

[(actual bending stress/ allowable bending stress) +

(actual tensile stress/ allowable tensile stress)]<1

TAILING LUG ANALYSISNo. of Tailing lugs 1IMPACT FACTOR 1.4

LOADS CASE A CASE B MAX BENDING MAX TENSION

WITHOUT WITH WITHOUT WITHIMPACT IMPACT IMPACT IMPACT

AXIAL LOAD / TAILING LUG Kg 66755 93457 0 0RADIAL LOAD / TAILING LUG Kg 86274 120783.6 86274 120783.6(Refer calculated maximum reaction values in lifting analysis)

TAILING LUG CALCULATION:MATERIAL: IS 2062 GR B Sa = 1049 kg/cm²

ALLOWABLE STRESS ( kg/cm² ) 2249 1349.4 899.6 1484.34 576.95

TAILING LUG DIMENSIONS: (…mm)(MIN.) H - DEPTH 327

M - MOMENT ARM 95D - PIN HOLE DIA 75

T - THK. 32R - RADIUS OF TAILING LUG 163.5

D' - DIAMETER OF BEARING PAD 150T' - THK OF BEARING PAD 16

CHECK ON SEC 'AA' IN TENSION: (LOAD CASE B)WIDTH mm 327THK mm 32AREA mm² 10464

STRESS: kg/cm² 1154.28 safe

  

YEILD STRESS (Sy)

TENSILE (0.6 * Sy)

SHEAR (0.4 * Sy)

BENDING (0.66 *

Sy)WELD SHEAR

(0.55*Sa)

H

M (When no continuous ring)

 

D

R

B

A

AC

B

C

`

M

C

CHECK ON SEC 'BB' IN SHEAR: (LOAD CASE B)SEC. WIDTH ( w' ) mm 159.14THK ( T + 2 * T' ) mm 64AREA ( 2 x w' x (T + 2 * T' ) mm² 20370.11

STRESS: kg/cm² 592.95 safe

CHECK ON PIN HOLE BEARING AREA (LOAD CASE B)WIDTH mm 75THK (T + 2 * T' ) mm 64PROJECTED AREA mm² 4800

STRESS: kg/cm² 2516.33 unsafeALLOWABLE STRESS (0.75 x Sy) kg/cm² 1686.75

CHECK ON SEC 'CC' IN BENDING: (LOAD CASE A)DEPTH mm 327WIDTH mm 32MOMENT ARM mm 95AREA mm² 10464

SECTION MODULUS 570288BENDING MOMENT kg-mm 8878415BENDING STRESS kg/cm² 1556.83TENSILE STRESS kg/cm² 1154.28

TOTAL STRESS kg/cm² 2711.11 unsafe

TAILING LUG WELD CHECKING

TAILING LUG HEIGHT @ SKIRT WELD H1 327 mmBASERING O/D Db 4174 mmSKIRT O/D Ds 3924 mm

LENGTH OF WELD ON ONE SIDE 452 mmTOTAL LENGTH OF WELD L = 2 x L1 904 mm

WELD FILLET SIZE f 16 mmTHROAT AREA OF FILLET w f / SQRT(2) 11.31 mmTOTAL AVAILABLE AREA OF WELD A w x L 10227.5924831 mm²

LOAD ON TAILING LUG : LOAD CASE 'B' WD 120783.6 Kg

ALLOWABLE SHEAR STRESS IN WELD Ssa = 0.4 x Sy 899.6 Kg/cm² (Eq. to Tailing Lug Material.)

REQUIRED AREA OF WELD :

LOAD CASE 'D' Ar WD/Ssa 13426.3672743 mm² unsafeTherefore weld provided between Tailing Lug & Skirt is safe.

mm3

Tailing Beam if req

1.904237

[(actual bending stress/ allowable bending stress) +

(actual tensile stress/ allowable tensile stress)]<1

LIFTING LUG CALCULATIONSCalculation based on Procedure 7-6 of Vessel Design Manual by Moss

Erection Weight (Kg) 7550Impact factor for Lifting 1.4Total Lifting Wt. (Kg) 10570No. of Lifting Lug 2Load on one Lifting lug PL (Kg) 5285LUG DIMENSIONS

d = (mm) 60R = (mm) 100T = (mm) 20H= (mm) 200

F=(mm) 159.5E = (mm) 200h2 = (mm) 130A = (mm) 0B = (mm) 0

Lifting Lug Material SA 516 GR 70Yield Strenght at Room Temp Sy = 2672 kg/cm²Allowable Tensile ( St ) Sa 1406 kg/cm²Allowable Bearing 0.8 Sy 2137.6 kg/cm²Allowable Shear 0.4 Sy 1068.8 kg/cm²Allowable Bending Stress 0.66 Sy 1763.52 kg/cm²

Sa 1406INDUCED STRESSES IN LIFTING LUGTensile str area of Lug = [ 2R - d] x T 2800 mm²Tensile Stress Induced 188.75 kg/cm² SAFEBearing Area (= d x T) 1200.00 mm²Bearing Stress Induced 440.42 kg/cm² SAFEShear Area = 2T x (√[R² - (d/2)²]) 3815.76 mm²Shear Stress Induced 138.50 kg/cm² SAFE

Max Load normal at Lifting Lug (P) = 79625 Kg(Refer Calculated Max Load during lifting)Maximum Moment Arm (L2=H) 200 mmBending Moment (M=P*L2) 15925000 kg-mmSec Modulus 133333 mm3Bending Stress Induced 11943.75 kg/cm² UNSAFE

WELD CHECKAllowable Weld Shear 0.55*Sa= 773.30 kg/cm²

CHECKING LUG WELDSLocation of CG (Long) from bot of lug (c ) = 36.74 mmc=(h2^2/(2*h2+2*R))Polar Moment of Inertia (Jw) = 4110442.03 mm3Jw=(((2*R+2*h2)^3/12)-(h2^2(2*R+h2)^2/(2*R+2*h2))

Finding Shear Loads on Weldi) Transverse Shear due to P (f1) = 110.59 Kg/mmf1 = (P / (2*R + 4* h2))ii) Transverse Shear due to M (f2) = 361.32 Kg/mmf2 = M*(h2-c) / Jw

H

F

E

iii) Longitudinal Shear due to M (f3) = 503.66 Kg/mmf3 = M*h2/Jwiv) Combined Load (fc) = 690.19 Kg/mmfc = sqrt ((f1+f2)^2+f3^2)

Fillet Size 35 mmThroat unit area (w) 24.75 mmMaximum Shear Stress = fc / w 2788.80 kg/cm² UNSAFEHence Provided Leg to Pad/ Shell fillet size is safe

CHECKING PAD WELDSMaximum Moment Arm (L1=H+F+E) = 559.5 mmBending Moment (M1=P*L1) = 44550188 kg-mmPolar Moment of Inertia (Jw=(A+B)^3/6) = 0.00 mm3Lifting Lug pad thickness = 22 mmFinding Shear Loads on Weldi) Transverse Shear due to P (f1) = #DIV/0! Kg/mmf1 = (P / (2*A + 2* B))ii) Transverse Shear due to M (f2) = #DIV/0! Kg/mmf2 = 0.5*M1*B / Jw iii) Longitudinal Shear due to M (f3) = #DIV/0! Kg/mmf3 = M1*B/Jwiv) Combined Load (fc) = #DIV/0! Kg/mmfc = sqrt ((f1+f2)^2+f3^2)

Fillet Size 22 mmThroat unit area (w) 15.56 mmMaximum Shear Stress = fc / w #DIV/0! kg/cm² #DIV/0!Hence Provided Leg to Pad/ Shell fillet size is safe

LOCAL LOADS kg / kg-mm N / N-mVessel is horizontal position : MT = [ H+F+E-(h2/2) ]xP 39374563 386135

FC = P 79625 780859Vessel is vertical position : FL = PL 7550 74041

LIFTING TRUNNION ANALYSIS

IMPACT FACTOR 2

LOADS Case C Case DAxis Horizontal Axis Vertical

Without Without Without Without Impact Impact Impact Impact

Axial Load Kg 0 0 21000 42000Tangential Load Kg 20000 40000 0 0(Refer calculated maximum reaction values in lifting analysis)

Sa 1104 Kg/cm²

MATERIAL: SA 516 Gr.70

ALLOWABLE STRESS (Kg/cm²) 2672 1603.2 1068.8 1763.52 607.2DIMENSIONSID OF TRUNNION mm 288.89THK OF TRUNNION mm 17.48OD OF TRUNNION mm 323.85CROSS SECTION AREA mm^2 16824.32SECTION MODULUS mm^3 1223031.32STRESSES IN TRUNNIONBENDING STRESS IN TRUNNION (LOAD CASE D)MOMENT ARM mm 500BENDING MOMENT Kg-mm 21000000BENDING STRESS Kg/cm² 1717.05 safe

SHEAR STRESS IN TRUNNION (LOAD CASE D)Kg/cm² 249.64 safe

CHECK TRUNNION TO SHELL ATTACHMENT WELD FOR SHEAR (LOAD CASE D)SHEAR STRESS IN WELD Kg/cm^2 249.64 safe

RF PAD THK. mm 18RF PAD DIAMETER mm 550VALUES USED FOR LOCAL LOAD CALCULATION:CASE C: (AXIS HORIZONTAL)CIRECUMFERENTIAL SHEAR 392268 NLONGITUDINAL SHEAR 0 NCIRECUMFERENTIAL MOMENT 500 mm Moment arm 196134 N-mLONGITUDINAL MOMENT 0 N-m

CASE D: (AXIS VERTICAL)LONGITUDINAL SHEAR 411882 NLONGITUDINAL MOMENT 205941 N-m

Yield Stress (Sy)

Tensile (0.6 * Sy)

Shear (0.4 * Sy)

Bending (0.66 * Sy)

Weld Shear

(0.55*Sa)