elbow thickness calculator
DESCRIPTION
LbowTRANSCRIPT
ASME B31.3Bend Thickness calculation as per ASME B31.3t =(PD)/(2*[SEW/I]+PY)for IntradosI=((4*(R1/D)-1)/(4*(R1/D)-2))for ExtradosI=((4*(R1/D)+1)/(4*(R1/D)+2))20bar=2N/mm2
Where,20000psi=137.893N/mm2Design PressureP=2N/mm220ksi=137.893N/mm2Outside diameterD=864mm137893kpa=137.893N/mm2Allowable stress in tensionS=137.893N/mm2137.893mpa=137.893N/mm2Quality FactorE=1Weld joint strength reduction factorW=1Co-efficientY=0.4Mean RadiusR=1295mmInner Diameter of BendIR=1726mmOuter Diameter of BendOR=3454mmfor IntradosI=1.9988425926for ExtradosI=0.7142620781Corrosion allowanceCA=1.6mmManufacturing tolerence%=12.5%
Cal.Bend Thickness for Intradost=12.4520038129mmCal.Bend Thickness for Extradost=4.4661182505mmCal.Pipe wall thicknesst=6.2476047233mm
Req.Bend Thickness for Intradost=15.8085042895mmReq.Bend Thickness for Extradost=6.8243830318mmReq.Pipe wall thicknesst=8.8285553137mmResultant min.bend thicknesst=15.8085042895mm
ASME SEC VIII DIV 1Pipe wall thickness as per ASME Sec VIII Div.1
Circumfernetial stress(longitudinal joints) : When thickness does not exceed one half of the inside diameter or P does not exceed 0.385SE the following formula appliest= PR/(SE-0.6P)formula-1Longitudinal stress(circumferential joints) : When thickness does not exceed one half of the inside diameter or P does not exceed 1.25SE the following formula appliest= PR/(2SE+0.4P)formula-2Boundary condtions:20bar=2N/mm2Internal Design PressureP=2N/mm2Inside RadiusR=864mm20000psi=137.893N/mm2Allowable Stress S=137.893N/mm20.385SE=53.088805N/mm220ksi=137.893N/mm2Joint EfficiencyE=11.25SE=172.36625N/mm2137893kpa=137.893N/mm2137.893mpa=137.893N/mm2Since the "P" value lies below 0.385SE formula-1 applies for this calculation.Calculated minimum thicknesst= 12.6414666442mmCorrosion allowanceCA=1.6mmManufacturing tolerance=12.5%Req.min.thicknesstmin=16.0216499748mm