1. Silicon Valley, Calif. Presents

2. CheckStress Why CheckStress?
Designers route piping systems mostly considering
Space constraints
Constructability
Operability
Reparability
Stress Engineers check stress and suggest layout changes
Designers reroute and Stress Engineers check again and this iteration goes on “back & forth”

3. Why CheckStress? (continued)
Nowadays, pressure and temperature are going up to increase plant production and efficiency
Increased pressure increases pipe wall thickness
Increased wall thickness increases pipe stiffness
Increased pipe stiffness increases thermal stresses and nozzle loads
So, designers need a product to “check stress” at design stage

4. What CheckStress Does
Reads piping geometry, properties, pressure & temperature
Performs stress analysis & plots
Thermal stress contours (blue, green, yellow, orange and red)
Weight stress contours (blue, green, yellow, orange and red)
Thermal deflected shape
Weight deflected shape
Operating load deflected shape

5. What Designers Should Do
Avoid orange and red in stress contour plots
To do this in thermal stresses
Make piping flexible by:
Adding pipe bends and loops
Placing intermediate anchors
Placing axial restraints
To do this in weight stresses
Support piping system vertically by:
Spring Hangers, Constant Support Hangers
Rod Hangers & Resting Supports

6. CheckStress Features What is CheckStress?
Reads piping geometry, pipe section and material properties
Uses temperature and pressure assigned at Branch level for carrying out piping stress analysis
Can include different branches stored under different PIPE hierarchy to carry out stress check
Reads pipe support details from 3D Plant Design and creates Supports, Hangers, Guides, etc. in CheckStress
Enables piping code compliance by displaying stress ratio contour plots for Sustained (weight + pressure) and Expansion load cases
Assists in locating hangers and supports by showing deflected shapes for Sustained, Operating and Expansion load cases
Generates CAEPIPE input file. CAESAR-II input file generation optional.

7. Demo on CheckStress

8. Demo on CheckStress

9. Demo on CheckStress

10. From the previous video
Demo on CheckStress
From the previous video
Piping overstressed for
- Expansion Load Case and
- Sustained (weight + pressure) Load Case

11. Revising 3D model To reduce Expansion stresses,
Demo on CheckStress
Revising 3D model
To reduce Expansion stresses,
added loops to make piping more flexible

12. Demo on CheckStress

13. From video for revised layout
Demo on CheckStress
From video for revised layout
Expansion Case is NOT overstressed
But, Sustained Case still is.

14. Revising 3D model again To reduce Sustained stresses,
Demo on CheckStress
Revising 3D model again
To reduce Sustained stresses,
added a few vertical supports

15. Demo on CheckStress

16. From revised layout video (supports)
Demo on CheckStress
From revised layout video (supports)
Piping is NOT overstressed for
- Expansion Case, nor for
- Sustained Case

17. Demo on CheckStress
Conclusion
HUGE Time Savings during design stage by Designers arriving at a code-compliant layout without the Stress engineer’s involvement
Multiple iterations between Design and Stress departments avoided

18. Detailed Stress Analysis in CAEPIPE
After the first level stress check using CheckStress
Detailed Stress Analysis in CAEPIPE
Analysis options modified
Thermal anchor movements added
Seismic load added
Analyze and review reports for
- Sustained Stresses
- Expansion Stresses
- Occasional Stresses
- Support Loads
- Frequencies
Converting using KP2CII
Convert into CAESAR II model using KP2CII
Compare CAEPIPE and CAESAR II results

19. Demo on CheckStress

20. Thank you for your time.
For more information, contact or
us: