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Design of stiffeners for industrial piping under external pressure using FEM

Stiffening rings are often used as reinforcement in various pressure equipment and their design is covered in different codes. Their implementation can provide more economical solution which satisfies design criteria without further increase of shell thickness. This is especially used in design of pressure vessel and piping under external pressure where failure is mostly caused by loss of stability. In this paper design check of pipe stiffeners is made using EN 13480-3 standard and commercial FEM software. Besides analysis of stiffening rings covered in the standard, use of spiral stiffeners is investigated. The reinforcement effect of the two different stiffener’s types are compared.

Piping, external pressure, stiffener, FEM, EN 13480-3

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