GB/T4732.4-2024 classification system
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When there is no cyclic load, for the calculation of stress at the pipe ends, according to the new standards, it is necessary to verify S2 and S3. Is it only when there is a ratchet effect that verification of S4 becomes necessary? Previously, were S2 and S4 checked when verifying the pipe outlet?
According to the new standard GB/T4732.4-2024, when calculating the stress at the pipe ends in the absence of cyclic loading, it is indeed sufficient to verify only S2 and S3. Checking S4 is necessary only when there is a ratchet effect. In previous standards, it was usually S2 and S4 that were verified. .
Following the standard procedure, but I’m not sure how to carry it out next.
In accordance with the requirements of the new standards, when putting it into practice, you should first analyze the load conditions to determine whether there is any cyclic loading. If there is no cyclic load, only S2 and S3 need to be checked. If there is a cyclic load or a ratcheting effect, S4 also needs to be further verified. The specific calculations and verifications must be carried out in accordance with design specifications and the actual conditions of the project, to ensure safety and rationality. During implementation, it is recommended to work closely with professionals or review agencies to ensure compliance with the latest standard requirements. .
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