stress valueMAXIMUM ALLOWABLE STRESS VALUES IN KsiMatl temp.in
deg.F-20 to
10015020025030040050060065070075080085090095010001050110011501200Matl
specn.SA515/516
Gr.6017.117.117.1-17.117.117.116.415.815.313.010.88.75.94.02.5----SA515/516
Gr.7020.020.020.0-20.020.020.019.418.818.114.812.09.36.74.02.5----SA
387
Gr.1121.4-21.4-21.421.421.421.421.421.421.421.420.213.79.36.34.22.81.91.2SA
387
Gr.2217.1-17.1-16.616.616.616.616.616.616.616.616.613.610.885.73.82.41.4SA
106
Gr.B17.117.117.1-17.117.117.117.117.115.613.010.88.75.94.02.5----SA
106 Gr.C20-20-2020202019.818.314.8129.36.74.0205----SA 335
P1117.1-17.1-17.116.816.215.715.415.114.814.414.013.69.36.34.22.81.91.2SA
335
P2217.1-17.1-16.616.616.616.616.616.616.616.616.613.610.885.73.82.41.4SA210
Gr.A117.117.117.1-17.117.117.117.117.115.613.010.88.75.94.02.5----SA
210 Gr.C20-20-2020202019.818.314.8129.36.74.0205----SA
19213.4-13.4-13.413.413.413.312.812.410.797.153.01.5----SA 213
T1117.1-17.1-17.116.816.215.715.415.114.814.414.013.69.36.34.22.81.91.2SA
213
T2217.1-17.1-16.616.616.616.616.616.616.616.616.613.610.885.73.82.41.4SA
234
WPB17.117.117.1-17.117.117.117.117.115.613.010.88.75.94.02.5----SA
234
WP1117.1-17.1-17.116.816.215.715.415.114.814.414.013.69.36.34.22.81.91.2SA
234
WP2217.1-17.1-16.616.616.616.616.616.616.616.616.613.610.885.73.82.41.4SA105202020-202019.618.417.817.214.8129.36.742.5----SA
182 F1120-20-20202020202019.719.218.713.79.36.34.22.81.91.2SA 182
F12SA 182
F2217.1-17.1-16.616.616.616.616.616.616.616.616.613.610.885.73.82.41.4INTERPOLATATIONTEMP
deg.FSTRESS VALUE IN KSIMAX(TEMP.)MIN(TEMP.)32.000Required stress
value0.000KG/CM^2c32.00f
Drum-270STRENGTH CALCULATION (IBR 1950)SHELL(CLASS-I)/DRUM
WORKING PRESSURE -Reg.270WP=2fE(T-0.762)/(D+T-0.762)
Eqn.72whereINPUTD=max.internal diametermmf=allowable stress
valuekg/cm^2T= thicknessmme=efficiency of ligamentswp=max.working
pressurekg/cm^2Matl specnmatl.working temp.in deg.Cdeg.CWORKING
PRESSURE =0.00Kg/cm^2Required minimum thickness t
=(wp*D/2fe-wp)+0.762required minimum thickness =0.00mmLigament
efficiencyHole diaa)Longitudinal ligament efficiency = ( P-D)/Pd1
=Longitudinal pitch P =d 2 =Hole dia D =0(d1+d2)/2=0Longitudinal
ligament efficiency =0b)Circumferential Ligament efficiency = (
P-D) / PDrum ODDrum thk.Hole diaangle between holes.(in deg)d1
=Circumferential pitch P =0.00d 2 =Hole dia D
=0(d1+d2)/2=0Circumferential ligament efficiency =0Equivalent to
longitudinal ligament efficiency = 2 * Circumferential ligament
efficiency0b)Diagonal Ligament efficiency (ref.IBR Fig.No.15)
TUBE-338STRENGTH CALCULATION (IBR 1950)WORKING PRESSURE OF TUBES
-Reg.338WP=2f(t-c)/(D-t-c) Eqn.87whereINPUTD=external diameter of
tubemmf=allowable stress valuekg/cm^2t=minimum thicknessmmc=0.75mm
for wor.pr.up to 70 kg/cm^2mmc=0 for wor.pr.exceeding 70
kg/cm^2wp=max.working pressurekg/cm^2Matl
specnNeg.tol.%1matl.working tempdeg.CWORKING PRESSURE
=0.00Kg/cm^2
pipe-350STRENGTH CALCULATION (IBR 1950)WORKING PRESSURE OF STEEL
PIPES -Reg.350a.Where the outside diameter is the basis for
calculation.WP=2fe(t-c)/(D-t+c) Eqn.91whereINPUTD=outside diameter
of pipemme=efficiency factore=1 for seamless pipef=allowable stress
valuekg/cm^2t=minimum thicknessmmc=.75mm0.75mmwp=max.working
pressurekg/cm^2Matl specnNeg.tol. %%1matl.working temp.deg.CWORKING
PRESSURE =0.00Kg/cm^2Required minimum thickness t
=(wp*D/2fe-wp)+0.75required minimum thickness =0.00mm
header-342aSTRENGTH CALCULATION (IBR 1950)CYLINDRICAL HEADERS
-Reg.342(a)Working pressure of cylindrical headers shall be
determined byby equation 72WP=2fE(T-0.762)/(D+T-0.762)
Eqn.72whereINPUTodproposed thkD=max.internal diameter0mmf=allowable
stress valuekg/cm^2T= thickness0mmE=efficiency of
ligamentswp=max.working pressurekg/cm^2Matl
specnNeg.tol.%1matl.working temp.deg.CWORKING PRESSURE
=0.00Kg/cm^2Required minimum thickness t
=(wp*D/2fe-wp)+0.762required minimum thickness =0.00mmLigament
efficiencyHole diaa)Longitudinal ligament efficiency = ( P-D)/Pd1
=Longitudinal pitch P =d 2 =Hole dia D =0(d1+d2)/2=0Longitudinal
ligament efficiency =0b)Circumferential Ligament efficiency = (
P-D) / PHeader ODHeader thk.Hole diaangle between holes.(in deg)d1
=Circumferential pitch P =0.00d 2 =Hole dia D
=0(d1+d2)/2=0Circumferential ligament efficiency =0Equivalent to
longitudinal ligament efficiency = 2 * Circumferential ligament
efficiency0b)Diagonal Ligament efficiency (ref.IBR Fig.No.15)
Hdr endplate-342bSTRENGTH CALCULATION (IBR 1950)CYLINDRICAL
HEADERS END ATTACHMENTS -Reg.342(b)WP=f(t-C)^2/d^2K Eqn.(89
A)whereINPUTd=internal diameter of the header466.72mmf=allowable
stress value1407kg/cm^2t= thick. of endplate at the weakest
part70mmC= 1 mm.1mmwp=max.working pressure97.25kg/cm^2K=0.9K=0.19
for ends integral with or flangedand butt welded to the
headerK=0.28 for ends directly strength welded to the headerMatl
specnSA 516 GR 70matl.working temp.100deg.CWORKING PRESSURE
=34.17Kg/cm^2minmum end plate thickness t
=sqrt((wp*d^2*k)/f)+CMinimum thickness =117.41mm
PIPESIZEPIPEPipe
ODSch.Thk21.3402.7721.3803.7321.31604.7521.3XXS7.1726.7102.1126.7402.8726.7803.9126.71605.5426.7XXS7.8233.4102.7733.4403.3833.4804.5533.41606.3533.4XXS9.0942.2102.7742.2403.5642.2804.8542.21606.3542.2XXS9.7048.3102.7748.3403.6848.3WALL3.6948.3805.0848.31607.1448.3XXS10.1660.3102.7760.3403.9160.3805.5460.31608.7460.3XXS11.0773.0103.0573.0405.1673.0807.0173.01609.5273.0XXS14.0288.9103.0588.9405.4988.9807.6288.916011.1388.9XXS15.24101.6103.05101.6405.74101.6808.08101.6XXS16.15114.3103.05114.3406.02114.3808.56114.312011.30114.316013.49114.3XXS17.12141.3103.40141.3406.55141.3809.53141.312012.70141.316015.88141.3XXS19.05168.3407.11168.38010.97168.312014.27168.316018.26168.3XXS21.95219.1206.35219.1307.04219.1408.18219.16010.31219.18012.70219.110015.09219.112018.26219.114020.62219.116023.01219.1XXS22.22273.1206.35273.1307.80273.1409.27273.16012.70273.18015.09273.110018.26273.112021.44273.114025.40273.116028.58323.9206.35323.9308.38323.9WALL9.53323.94010.31323.96014.27323.98017.48323.910021.41323.912023.83323.914028.58323.916033.32355.6106.35355.6207.92355.6309.53355.64011.13355.66015.09355.6STG12.70355.68019.05355.610023.83355.612027.79355.614031.75355.616035.71406.4106.35406.4207.92406.4309.53406.44012.70406.46016.66406.48021.44406.410026.19406.412030.96406.414036.53406.416040.49457.2106.35457.2207.92457.23011.13457.2WALL9.53457.24014.27457.26019.05457.2STG12.70457.28023.83457.210029.36457.212034.93457.214039.67457.216045.24508.0106.35508.0209.53508.03012.70508.04015.09508.06020.62508.08026.19508.010032.54508.012038.10508.014044.45508.016050.01558.8106.35558.8209.53558.83012.70558.84015.88558.86022.23558.88028.58558.810034.93558.812041.28558.814047.63558.816053.98609.6106.35609.6209.53609.63014.27609.64017.48609.66024.61
