Square tubes under inside pressure
according to TRD 320 and EN 12952-3/9.3
Input data
Outer width of tube
B
mm
Outer height of tube
H
mm
Tube wall thickness
S
mm
Inside corner radius
R
i
mm
Inside pressure
p
bar
Allowable stress
S
m
N/mm²
Calculate
Minimum value of allowable stress
Stress efficiency
acc. to TRD 320
at the corner
σ
all 0
N/mm²
at the middle of side face
σ
all v
N/mm²
acc. to EN 12952-3/9.3
at the corner
σ
all 0
N/mm²
at the middle of side face
σ
all v
N/mm²
acc. German norms
at the corner
σ
all 0
N/mm²
Analytical calculated hoop stresses
Stress efficiency
membrane
at the corner
σ
mem 0
N/mm²
at the middle of side face
σ
mem v
N/mm²
membrane+bending
at the corner
σ
mb 0
N/mm²
at the middle of side face
σ
mb v
N/mm²
Sketch
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