Nadia Strikovski
Staff Systems Architect, CAESAR II Development

Part 2: Load Case Template Usage for the Expansion Stress Range

In last month’s newsletter, we defined load case templates. Let’s now take a look at systems with multiple operating conditions.

Consider a system that has only one operating temperature (or operating temperature fluctuations are insignificant/uncommon). For such a system, we would only need to consider one expansion range condition for either the start-up or shutdown, where temperature cycles between the ambient/installed to the operating. The single expansion load case could be set up by subtracting the SUS state case from OPE state case. This may be easily set up manually, or recommended by the CAESAR II Static Load Case Editor (regardless of the particular Load Case Template selection).

Most piping systems, however, have more than a single operating condition. Some systems may experience temperature fluctuations in the operating cycle based on daily (day/night) or seasonal (summer/winter) external temperature changes. Other systems may include deviations in operating temperature due to varying the quality/consistency of the matter flowing inside the pipe.

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Vol.3 | Issue 4 | April 2016
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It's sometimes interesting to see how what we do (pipe stress analysis using CAESAR II) is summarized by others. Here's an article from Chemical Processing: "Mind Piping System Mechanics."   The article provides a quick review of piping layout, support requirements, and pipe stress analysis.