Chapter 5

Thin-Walled Pressure Vessels

5.1 Introduction

A pressure vessel is used for storing liquid or gas under pressure. A pipeline through which pressurized fluid flows is also treated as pressure vessel, since it is full of fluid under pressure during its service life. Normally pressure vessels are of cylindrical or spherical shape.

A pressure vessel is thin walled when the ratio of its thickness to radius is such that variation of stress across its thickness can be disregarded. The surface in which the thickness lies is the plane normal to the surface of the cylinder. It will be shown by exact analysis that if the ratio of thickness to inner radius is greater than 1/10 then the normal stress on the thickness varies from a maximum on the ...

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