Pressure Vessel Wall Thickness

Calculate the minimum wall thickness of a thin-walled cylindrical or spherical pressure vessel under internal pressure, free online.

Design pressure (MPa)

Inside radius (mm)

Allowable stress S (MPa)

Joint efficiency E (0.7 – 1.0)

Corrosion allowance (mm)

About this calculator

Using ASME VIII Div.1 style formulas: cylinder shell t = P·R ÷ (S·E − 0.6P); sphere t = P·R ÷ (2S·E − 0.2P), where P is the internal design pressure, R the inside radius, S the allowable stress and E the joint efficiency. Add a corrosion allowance. For preliminary sizing only — vessels must be designed to the applicable code by a qualified engineer.