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Tank강도 계산 공식 및 용량 계산 공식
Calculation of air compressor reservoir strength and volume
1. Calculation of strength of reservoir
We apply the rule of JIS B 8243 (Structure of boiler pressure
reservoir)
1) Thickness of shell plate (mm)
The equation is as follows ;
P D
t= ------------------ + C
200 σxη - 1.2 p
t : thickness of shell plate (mm)
σ : tensile strength of reservoir material (kg/mm2)
η : efficiency of length joint (%)
D : inside diameter of reservoir (mm)
C : corrosion allowance (mm)
p : internal pressure of reservoir (kg/mm2)
x : allowable stress rate on tensile strength
In case of steel, apply 1/4
2) Thickness of end plate
The equation is as follows ;
P R
t = ------- + C
150σxη
t : thickness of end plate (mm)
σ : tensile strength of reservoir material (kg/mm2)
η : efficiency of length joint (%)
C : corrosion allowance (mm)
p : internal pressure of reservoir (kg/mm2)
x : allowable stress rate on tensile strength
In case of steel, apply 1/4
Calculation of reservoir volume
① Volume of shell plate
π
V= ----- D2 ℓ
4
D : internal diameter of reservoir (mm)
ℓ : length of shell plate (mm)
② Volume of end plate
Ve = μ X D3 X 2
D : internal diameter of reservoir (mm)
μ : experience coefficient = 0.13385
③ Total volume of reservoir
① + ② = ℓ
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