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Attention: Please see the following AutoPIPE help section: Help > Contents> Contents Tab> Modeling Approaches> Modeling Approaches>This help has been provided in order to give users ideas for modeling typical piping arrangements. The steps shown in each example should not be taken as the only method available to create models. In addition, the intent of the examples is to present ways to create adequate models of specific piping components for analytical purposes.
Flexible Joints
a. Single Bellows Expansion Joint b. Tied Bellows Expansion Joint c. Tied Universal Expansion Joint d. Hinged Expansion Joint e. Gimbal Expansion Joint f. Slip Joint g. Ball and Socket Joint h. Pressure Balanced Expansion Joints
Answer: click here
Answer:
Correct a tie/link support does not maintain arc swing length. However, they do maintain the distance between tie rod ends where the main control function is to maintain the flanges parallel. No program including Caesar will arc tie rods and even if it does would be insignificant change in the expansion joint behavior.
Answer: see the following:
http://communities.bentley.com/products/pipe_stress_analysis/m/pipe_stress_analysis_gallery/260260.aspx
November 2014:
If the expansion joint do not seem to be flexing, review the Flexible Joint Stiffness values modeled by opening the Dialog or Flexible Joint Input grid tab:
In some cases, the flexible joint stiffness settings were found to be all Rigid. I a flexible joint has all stiffnesses set to Rigid, this would be the same as a piece of rigid pipe and will offer no flexibility. Suggest modifying the stiffness values as need to model your expansion joint.
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