In this work, a case study of design of formed bellows, made of SS316LN, operating below creep range for nuclear application is presented. Hence, the design of the bellows for nuclear systems needs detailed Finite Element Analysis (FEA) and fatigue life estimation as per the design curves given in the codes. ![]() In nuclear applications, design of the bellows shall comply with standard nuclear design codes such as ASME section-III, RCC-MR etc, which follow design by analysis. Conventionally, design and manufacturing of the formed bellows are extensively addressed in standards of Expansion Joint Manufacturers Association (EJMA). Formed bellows are the most commonly used type of bellows especially when stoke is less than one thirds of bellows free length. Bellows are highly engineered components which find large number of applications in nuclear industry.
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