Calculation of Thicknesses of Return Bends and Elbows
according to API standard 530
Attention!
This calculation is only a simplified estimation, and does not replace a detailed design calculation.
Input data
Outside diameter
D
o
mm
or
Inside diameter
D
i
mm
Center line radius
r
cl
mm
Intrados thickness
δ
i
mm
Extrados thickness
δ
o
mm
Design pressure
p
bar (g)
Maximum allowable stress
σ
el/r
MPa
Minimum yield strength
S
Y
at 20 °C
MPa
Minimum tensile strength
S
T
at 20 °C
MPa
Material type
ferritic steel
austenitic steel
Calculate
Results
Maximum allowable pressure
p
max
bar (g)
Required intrados thickness
δ
i min
mm
Required extrados thickness
δ
o min
mm
Required testing pressure
p
T
bar (g)
(acc. to API-560)
Allowable testing pressure
p
T all
bar (g)
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