| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Area: | Modeling |
| Date Logged & Current Version | Oct. 2021 12.06.00.48 |
Problem:
How to model lifting pipe segment(s) using AutoPIPE?
Solution:
Suggest creating a new model file for analyzing stresses in piping due to lifting. Essentially remove all piping not apart of that being lifted at one time and remove all supports in the model. Next add incline support at locations as needed to represent lifting point(s). Orient the incline support in the general direction of the lifting Strap / Rope / Chain / Cable. Analyze model and review stresses.
Typical lifting picks:
1. A single pick point
2. Multiple pick (support) points coming together at a single location to then be lifted
3. Multiple pick (support) points going to various points on a spreader bar that is then coming together at a single location to then be lifted from
Note, image above has 2 options, model the supports to ground or model spreader bar with supports from pipe to the bar and then from the bar to the pick point.
4. One or more of the above used by multiple devices lifting.
spreader bar and pick location
One could account for stresses related to Pressure and Temperature. Pressure load case are typically zero or really low values when lifting / transporting piping arrangements that are under full operating conditions. Likewise, enter ambient temperature when piping arrangement was constructed and various temperatures that maybe encountered during lift phase(s).
Note: if piping is not picked while maintaining a same orientation on the ground, rotate the model as needed to mimic the pick orientation.