Thin-Walled Pressure Vessel Calculator

Hoop and longitudinal stress for a thin-walled cylindrical pressure vessel.

Internal pressure P (MPa)Inner radius r (mm)Wall thickness t (mm)Calculate

Equations

Hoop stress σh = Pr/t. Longitudinal stress σl = Pr/(2t).

Assumptions

Thin-wall theory valid for r/t ≥ 10. Does not cover welded joint efficiency, fatigue or code-specific safety factors (e.g. ASME VIII).