Calculation of Caesar stress in pipelines
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I’ve been studying *pipe stress recently, and I have a question: although the results of the secondary stress calculation are within acceptable limits, the values exceed Sh. Won’t this cause the material to fail?
If the secondary stress is acceptable, then the normal stress should be less than the allowable stress. Also, there shouldn’t be a “Sh” in the report; what should be written there is the allowable stress.
Yes, but the calculated value of the secondary stress must be greater than the allowable value of the primary stress, that is, Sh. Won’t this lead to pipe failure?
One-time stress: Stress resulting from pressure, gravity, and other external force loads； Secondary stress: Stress generated as a result of displacement loads such as thermal expansion, contraction, and endpoint displacement. These two types of stress are defined in engineering calculations to simplify the computations; therefore, these values must be used within the limits specified by the standards. I suggest you find online a video titled “CAESARII from Scratch – Basic Theory of Pipe Stress Analysis”; this video explains primary and secondary stresses very clearly.