Related Resources: pressure-vessel

Circular Flat Head with Internal or External Pressure Equation and Calculator

Structural Design and Analysis
Pressure Vessel Design and Engineering

Circular Flat Head with Internal or External Pressure Equation and Calculator

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Stress in Pressure Vessel Flanged or Dished Head Section Seam Calculator:

This equation applies when:

• When d does not exceed 24 in,
• t_h/d is not less than 0.05 or greater than 0.25,
• Head thickness, t_h is not less than the shell thickness, t_s .

Required minimum wall thickness
t = d ( 0.13 P / ( S E) )^0.5

Where:

P = Design pressure or max. allowable working pressure, psi
d = Inside diameter of vessel , inches
S = Rated stress value of the material
t = Minimum thickness of shell (wall) exclusive of corrosion, inches
t_h = Actual thickness used in actual design, inches
t_r = Minimum required thickness of seamless shell for pressure, inches
t_s = Actual thickness of shell, exclusive of corrosion allowance, inches
E = Weld Joint efficiency