How to determine whether there are severe cyclic conditions in a pipeline
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When performing pipeline stress calculations, it is often asked whether the condition constitutes severe cyclic loading. I would like to know how to determine whether a condition falls under severe cyclic loading
Determining whether a pipeline is under severe cyclic conditions is mainly based on the frequency and range of changes in operating temperature and pressure. This can be achieved through the following steps: 1. Analyze the system’s operating parameters: Observe the changes in temperature and pressure during the system’s operation, and record the frequency and magnitude of these changes. 2. Compare historical and design data: Compare the actual operating conditions with the design specifications to determine whether they exceed the design expectations. 3. Consult the operator: Find out whether the equipment’s operating status changes frequently during use, such as starting/stopping or changes in load. 4. Technical assessment: Conduct stress analysis, including fatigue analysis, to determine whether fatigue damage may occur due to cyclic loading. If temperature and pressure changes are frequent and significant, and exceed the design limits, it may be considered a condition of severe cycling. .