Pipe Stress Analysis Report

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After stress analysis of a piping system is complete, a report package is created. It helps in documenting stress analysis done on that particular piping system. It should be submitted to client for preservation throughout lifetime of the plant.

It Includes following components.

  1. Basic input data and calculated conditions
  2. Layout isometric and supports configuration including gaps/limit stops
  3. Calculated member forces and stresses for different load cases
  4. Forces, moments and displacement reports
  5. Spring Hangers design parameters
  6. Additional requirements (reinforcement pad etc.)
  7. Flange leakage checks if applicable.
  8. WRC 107/WRC 297 checks.
  9. Allowable Stress Range.
  10. Expansion Bellow parameters
  11. Design calculations for adequacy of supporting elements
  12. Loads at interface B/L with ISBL/OSBL if any.
  13. Analysis of segments till nearest anchor at battery limit
  14. Basis of allowable forces and moments & wherever applicable vendor given allowable
  15. loads/moments.
  16. Allowable equipment load check
  17. Codal Check.

CAESAR II stress analysis reports.

Displacements Report

In this report, translations and rotations for each degree of freedom are reported at each node in the model.

Restraints Report

In this report, forces and moments on each restraint in the model are reported. There is a separate report generated for each load case selected.

Restraint Summary

This report is similar to the restraint report, this option provides force and moment data for all valid selected load cases together on one report.

Global Element Forces

Local Element Forces

These forces and moments have been transferring into the CAESAR II local coordinate system.

Stresses

SIFs and Code Stresses are reported for each node in the model. The code stresses are compared to the Allowable stress at each node as a percentage. Note that stresses are not computed at nodes on rigid elements.

Sorted Stress

Bending, Torsion, and Code Stress each are sorted from highest to lowest value with corresponding node numbers.

Code Compliance Report

Stress checks for multiple load cases may be included in a single report using the Code Compliance report, available from the Static Output processor. For this report, the user selects all load cases of interest, and then highlights Code Compliance under the Report Options. The resultant report shows the stress calculation for all load cases together, on an element-by-element basis.

Cumulative Usage Report

The Cumulative Usage report is available only when there are one or more fatigue-type load cases present. One Cumulative Usage report is generated, regardless of the number of load cases selected, showing the combined impact of simulating selected fatigue loadings.

Load Case Report

The Load Case Report documents the Basic Names (as built in the Load Case Builder),

User-Defined Names, Combination Methods, Load Cycles, and Load Case Options (Output Status, Output Type, Snubber Status, Hanger Stiffness Status, and Friction Multiplier) of the static load cases. This report is available from the General computed Results column of the static Output Processor.

Hanger Table with Text

This report provides basic information regarding spring hangers either selected by

CAESAR II or the user. Information provided includes the node number, the number of springs required, the hanger table figure number and size, the hot load, the theoretical installed load, which is what the hangers are set to in the field prior to pulling the pins, the actual installed load, which is the load on the hanger when the pipe is empty, the spring rate from the catalog, and the horizontal movement determined from the CAESAR II output.

If constant effort supports are selected then the hanger constant effort force is reported.

Input Echo

The input echo allows the user to select which portions of the input are to be reported in this output format. All basic element data (geometry), operating conditions, material properties, and boundary conditions are available in this report option.

Miscellaneous Data

This report displays the Allowable Stress Summary, Bend Data, Nozzle Flexibility Data, Pipe Report, Thermal Expansion Coefficients used during analysis, Bill of Materials, the Center of Gravity Report, and Wind and Wave input data.

Warnings Report

All warnings reported during the error checking process are summarized here.

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