Usage Tips Volume 3 (page 1 of 3)

Topics Covered

Hydrotest Pressure
Graphics - Displacements & Forces
Printing Input for Verification
Load Case Options
Output Graphics - Element Viewer

Hydrotest Pressure Feature

CAESAR II users can specify a value for the system hydrotest pressure. The entry for this pressure can be found at the bottom of the piping input spreadsheet, just below P1 and P2. Additionally, an entry field for this pressure also exists on the extended operating conditions dialog. Both of these hydrotest pressure fields are shown in the figure below.

When a hydrotest pressure is specified, CAESAR II will recommend a load case consisting of WW + HP. The components in this load case are:

  • WW: Pipe weight filled with water. This includes insulation and/or refractory if specified.
  • HP: The specified hydrotest pressure.

For this load case, it is assumed that any spring hangers are locked against movement. A typical set of load cases, including a hydrotest case is shown in the figure below. Note that "Case 1" is the hydrotest case.

Graphics - Displacements & Forces

The 3D Graphics engine can display applied displacements and forces in tabular format. The display windows can be scrolled vertically to review all node points where this data has been defined, as well as horizontally to review all 9 possible load vectors. The color key at the far left of the window assists in locating the node points on the model (when the model geometry is complex). An example showing the applied displacements in a model is shown in the figure below.

Note that the displacement window also indicates free Degrees of Freedom. In this case, a free DOF is a DOF where no displacement value has been specified. Note also that if a certain DOF has a specified displacement in one of the nine possible load vectors, then it si fixed in all other load vectors.

Printing Input for Verification

In many instances it is desireable to print the piping model input in columnar style to aid in model verification. This can be easilty accomplished using the CAESAR II LIST Processor. The initial windows displayed in this LIST processor is shown in the figure below.

To prepare for printing, any unnecessary columns can be collapsed, by using the mouse and sliding the grid lines together. Next, turn off the display of duplicated data. The resulting display is shown in the figure below.

Finally, print this information in Landscape orientation. A Print Preview of this setup is shown in the figure below.

CAESAR II Tips (Vol 3) Page 2
CAESAR II Tips (Vol 3) Page 3

[Go Back]