moment of inertia api 650

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CALCULATION FOR MOMENT OF INERTIAL OF STIFFENER 130 8 130 8 68 SHELL corroded thkickness 6 200 section Area Y AY H H 2 AH 2 Ig 1 1200 3 3600 65 4225 5070000 3600 2 1040 71 73840 3 9 9360 1464666.7 3 1040 140 145600 72 5184 5391360 5546.6667 Total = 3280 223040 10470720 1473813.3 Neutral Axis = 68 Moment of Inertia, I = 11944533 mm 4 Section modulus, Z = 157164.9 mm 3 157.1649 cm 3 Section modulus is from wind direction. So y value is 144 - 68 = 76

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MOMENT OF INERTIA OF STIFFENER

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Page 1: Moment of Inertia API 650

CALCULATION FOR MOMENT OF INERTIAL OF STIFFENER

1308

130 8

68

SHELLcorroded thkickness 6

200

section Area Y AY H H2 AH2 Ig1 1200 3 3600 65 4225 5070000 36002 1040 71 73840 3 9 9360 1464666.73 1040 140 145600 72 5184 5391360 5546.6667

Total = 3280 223040 10470720 1473813.3

Neutral Axis = 68

Moment of Inertia, I = 11944533 mm4

Section modulus, Z = 157164.9 mm3 157.1649 cm3

Section modulus is from wind direction. So y value is 144 - 68 = 76