Skirt Bracing Calc for Vertical Pressure Vessels

BASE RING

for three point

(Refer Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.) Tailing Lug

T

Skirt Bracing

Rm Dist from N.Axis from CL

MATERIAL : Ys - YIELD STRESS MATERIAL : SA 285 GR C Ys - YIELD STRESS 2109 kg/cm² Sba - ALLOW.BENDING STRESS = 0.66 x Ys 1391.94 kg/cm² F2 - MAXIMUM LOAD (in horiz. position) : 16198 kg Z - SECTION MODULUS OF BASE RING+SKIRT 213500 mm3 Di - INSIDE DIAMETER OF BASERING 2830 mm Rm - 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-mm BENDING 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 BEAM STIFFNER BEAMS PROVIDED AS INDICATED ABOVE WITH THE TAILING LUG MATERIAL : SA 36 TAILING BEAM SIZE SELECTED H 200*200*12*12 YIELD (Ys): 2530 ALLOW.BENDING STRESS (Sba = 0.66 Ys) : 1669.8 SECTION MODULUS OF BEAM : 479221.76 SECTION MODULUS OF BEAM (Z) : 479221.76

kg/cm² kg/cm² mm3 mm3

MAXIMUM LOAD F2 : (0.453*T) FOR 3 BEAM CONST L: MAX.BENDING STRESS (F2*L/Z) :

kg mm kg/cm2

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

7337.69 200 306.23 SAFE

BASE RING

for two point

(Refer Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.) Tailing Lug

T

Skirt Bracing

Rm Dist from N.Axis from CL

MATERIAL : Ys - YIELD STRESS MATERIAL : SA 285 GR C Ys - YIELD STRESS 2109 kg/cm² Sba - ALLOW.BENDING STRESS = 0.66 x Ys 1391.94 kg/cm² F2 - MAXIMUM LOAD (in horiz. position) : 31290 kg Z - SECTION MODULUS OF BASE RING+SKIRT 650328 mm3 Di - INSIDE DIAMETER OF BASERING 5630 mm Rm - 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-mm BENDING 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 BEAM STIFFNER BEAMS PROVIDED AS INDICATED ABOVE WITH THE TAILING LUG MATERIAL : SA 36 TAILING BEAM SIZE SELECTED H 250*250*9*14 YIELD (Ys): 2530 ALLOW.BENDING STRESS (Sba = 0.66 Ys) : 1669.8 SECTION MODULUS OF BEAM : 846305 SECTION MODULUS OF BEAM (Z) : 846305

kg/cm² kg/cm² mm3 mm3

MAXIMUM LOAD F2 : (0.5*T) FOR 1 BEAM CONST L: MAX.BENDING STRESS (F2*L/Z) :

kg mm kg/cm2

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

15645.00 250 462.16 SAFE

BASE RING ADEQUACY

(For One Point)

(Refered Procedure 7-5 of Pressure Vessel Design Manual by Dennis R Moss.) Tailing Lug

T

MATERIAL : Ys - YIELD STRESS Sba - ALLOW.BENDING STRESS = 0.66 x Ys F2 - MAXIMUM LOAD (in horiz. position) : Z - SECTION MODULUS OF BASE RING+SKIRT Di - INSIDE DIAMETER OF BASERING Rm - MEAN RADIUS OF SECTION BM - 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

(For One Point)

ual by Dennis R Moss.)

IS 2062 GR B 2249 1484.34 86274 766398 3640 1111.45

kg/cm² kg/cm² kg mm3 mm mm

F2 x Rm x 0.2387

r One point lifting at Zero deg)

IONAL STIFFENING BEAM

22888761 2986.54 UNSAFE

kg-mm kg/cm²