CAEPIPE

1. Why CAEPIPE 3D+ is superior?
SST Systems, Inc.
1798 Technology Drive, Suite 236
San Jose, CA 95110 USA
Phone: +1 (408) 452-8111
Fax: +1 (408) 452-8388
Visit: sstusa.com
Pipe Stress Analysis Software - CAEPIPE
Pipe Stress professionals’ choice of software
DETAILS | DOWNLOADS | LINKS
Give it a try !!

2. User Interface
“Simplicity is the ultimate sophistication.”
Topics of discussion:
• Modeling
• Elements
• Supports
• Snubbers
• User Friendly
• Jacketed piping
• Buried piping

3. • CAEPIPE interface is simple to use.
• It’s very intuitive to model a pipe route, like writing a script in
Layout Window looking at piping ISO.
• Each row represents an element from a node to a node.
• Do not need highly trained and experienced professionals.
Anyone can quickly learn.
Modeling in
CAEPIPE
‘Type’: Element type is a
component between two nodes.
‘Data’: type defines constraints at
nodes like supports, loads.
1 2
2
1
Layout Window
Graphics Window
Node 20
Node 30

4. • Copy & Paste instead of repeatedly defining
element with the same properties.
• Sixteen Elements are available with short keys in the ‘Type’ column... • Four Elements are only available; others need to
be modeled individually and repeatedly.
‘s’ for slip joint
‘h’ for hinge joint
‘bel’ for bellows
1
1 Select Element Type or use short key…..
‘e’ for elastic element
Type ‘be’ for bend
*Pipe type is default and blank in Type column
j for Jacketed pipe
jb for Jacketed Bend
r (Tab) for Reducer
ri Rigid element
v for Valve
t for Tie rod
ba for Ball joint
c for Cut pipe (Cold spring)
see manual for more…
Elements
CAEPIPE 3D+ CAESAR-II (C-II)

5. Support types are NOT predefined and must be
defined using mathematical constraints repeatedly
at all locations.
Supports
• Support types are predefined and can be modeled with short keys… in the ‘Data’ column.
2
‘a’ for anchor
‘g’ for guide
‘l’ for limit stop
‘sn’ for snubber
h for hanger
sk for skewed restraints
n for nozzle
see manual for more…
‘x’ , ‘y’ or ‘z’ for
CAEPIPE 3D+ C-II
Select Data type or use short key…..
2
• Copy & Paste instead of repeatedly defining
support with the same properties.

6. Supports
Generic Support
‘ge’ for Generic Support
• A generic data type called “Generic support” is available to define a complex support fitting for which
support stiffnesses are obtained from an external source, using a reduced 6x6 stiffness matrix.
Not available in C-II
CAEPIPE 3D+ C-II
2
Select Data type or use short key…..
2

7. • Snubbers automatically included only for Static Seismic and all Dynamic
cases and hence, excluded for all other load cases including Sustained,
Thermal, Wind and others.
• No iteration process required unlike C-II.
Snubbers
Modeling snubber in C-II is tedious as it requires the user to
1. Run the operating case without snubbers.
2. Note the displacements in all six degrees of freedom at each snubber location
(possibly dozens).
3. Add each snubber with distinct Cnode in the classic Piping Input dialog box.
4. Enter the displacements from Step 2 at all snubber Cnodes.
5. Modify the load cases by including D1 wherever T1 is displayed.
6. Repeat the steps 1-5 on all snubbers for any slight or significantchanges in
model (typically 10+ snubbers in mid-size models).
CAEPIPE 3D+ C-II

8. Duplicate Rows Change Rows... Find and Replace...
IN
CAEPIPE
User friendly
• Simply Copy & Paste support, branch or section of pipe
in CAEPIPE.
• Modifying / Changing pipe route, material, loads or any
parameter is easy and quick in CAEPIPE.
• These are difficult and tiring in C-II.
Easy implementation of any changes in pipe route
Copy & Paste
Find and
Replace
Multiple Split Slope
Rotate Change Combine
Renumber
Nodes
Refine Nodal
Mesh
Refine
Branches
Generate Regenerate
*N/A in C-II *N/A in C-II
Modify pipe route with
copy & paste
Changes properties of
pipe route

9. List Window in CAEPIPE
• You can list elements, supports, components, loads, etc.
• Collectively change the properties using the List window.
List of Anchors
List of Skewed Restraints
Snubbers
Spectrum levels
see manual for more…

10. Modeling
Topic Other Software
Multitasking Work on multiple models at the same time. Can work on only one model at a time.
Comments
Add comments for every element in the model and
print them.
Not possible for every element.
Graphics Single-click in the graphics window to edit data. Graphics editing may not be possible.
Graphics
Graphical display settings are remembered between
sessions, even between version upgrades. Can
display additional data (supports, node #s, etc.) in
rendered view.
Graphical display settings are lost upon exiting graphics.
May not display any supports, node #s, etc. in rendered
view.
Units
Units always readily visible and can be changed at
anytime (input or in results).
Units not readily visible. For changing units, the Model
file should be converted in a separate module. Units
cannot be changed after analysis.
Results
Displays and prints sorted stress ratios for each stress
type (Sustained, Thermal, and others).
User must hand calculate the ratios and sort manually.
Results Fully interactive results review possible.
Mostly text files shown in Notepad editor-like interface,
without interactivity.
Reports
Reports are short and formatted (and user-
formattable). e.g., for the CAEPIPE Sample model:
results report length is 9 pages.
Reports are long and unformatted (and user cannot
format them). Hard and time-consuming to review.
Equipment
Any number of pumps, compressors and turbines can
be analyzed, and results reviewed in one screen.
User must load separate files to view results for each
pump or compressor or turbine.
Loads
Automatically adds Sustained to Occasional stresses
as directed by the piping code (SL + SO).
User must add Sustained to Occasional stresses
manually to get (SL+SO).
Interface
Four open user windows for maximum productivity
and quick understanding.
May be one window can be open - either input or
results.
Other advantages

11. • Performing stress analysis of Jacketed piping in C-II is
cumbersome.
• Its two-step process: 1) model core pipe layout, then 2)
duplicate and modify the core pipe layout for the jacketed pipe.
• A Whole lot of things noted below are required to be taken care
of. A slight error will lead to erroneous results.
• Any changes in pipe route later must be taken care of for both
pipes.
Jacketed piping
Step 1) Model the Core Pipe:
• Do not give insulation thickness while modeling core pipe.
• No wind/wave to be applied on core pipe.
• No supports shall come directly on core pipe.
• All spiders, which are acting as internal supports, can be modeled
as vertical restraints plus lateral restraints (guides) with gap as
mentioned in jacketed piping specification.
• Location of spider shall be presumed before modeling & provide a
free node at that location.
• At places where jacket will be supported, give node numbers of
those locations in core pipe like 5, 15, 115 etc. All other nodes will
be multiple of 10.
• Use element types Jacketed pipe and Jacketed bend to
model both inner core pipe and outer jacket pipe of Jacketed
piping simultaneously.
• Assign size and load of Jacketed pipe and Jacketed bend.
Jacketed pipe
Define material,
section and load
Jacketed bend
Define material,
section and load for
Jacketed bend and
other properties for
both.
CAEPIPE 3D+ C-II

12. Jacketed piping
Step 2) Jacketed Pipe: Duplicate the core pipe and change
• To model the jacket pipe, duplicate the core piping using a proper
node increment (like 1000).
• Change the diameter of the jacket pipe according to the
specifications.
• Change the wall thickness of the jacket pipe.
• Apply insulation thickness and insulation density.
• Apply wind/wave/seismic if any.
• Temperature should be the temperature of the heating medium.
• Pressure should be the pressure of the heating medium.
• All supports should be on jacketed portion only.
• If steam is flowing in jacket pipe then put density as zero,
otherwise follow the formula provided in the next point.
• If both the jacket and the core are fluid filled, the fluid density of the
jacket must be reduced to avoid excess (incorrect) weight.
CAESAR-II does not do this automatically.
• You need to model the pipe route only
ONCE.
• Any changes in pipe route later are hassle-
free.
• Results are given for both core pipe and
jacketed pipe.
• Unique feature in CAEPIPE.
Layout Window: Select Jpipe and
Jbend in element type Stress Results: Nodes ending with J
stands for Jacket pipe
A Whole Lot of things given below are required to be taken
care of. A slight error will lead to erroneous results.
Spider
Jacket pipe
Core pipe
CAEPIPE 3D+ C-II

13. Buried piping analysis
• Buried piping modeling in C-II is a 3-step process.
1) Model the pipe route.
2) Note down the node numbers for underground pipes.
3) Start buried pipe modeler and specify buried portion.
• All underground thrust blocks are removed in the above process.
• For any changes to pipe route, repeat the process.
• Buried pipe module is integrated into CAEPIPE. Hence, it does not
require a separate interface unlike C-II.
• To model buried piping, just associate soil name to pipe section(s)
used for that buried portion.
• Thrust blocks and supports below ground remain intact.
• Procedure to modify buried pipe routing is the same as that for
above ground piping.
CAEPIPE 3D+ C-II

14. Buried piping analysis
• Can model Soil for various Buried piping scenarios
Piping Buried under same types of Soil
Buried depth of soil above centre line is varying along the route
Piping Buried under different types of Soil
Depth of piping is uniform above the sloped centreline
CAEPIPE 3D+

15. Uniqueness
Distinct Features in CAEPIPE 3D+
Topics of discussion:
• checkSTRESS
• HOTclash
• dataTRANSLATORS
• Dynamic Susceptibility
• Formatted Report
• CAEPIPE Reviewer

16. checkSTRESS
Supported 3D Plant Design Systems:
E3D, PDMS, CADMATIC, SmartPlant 3D, PDS, AutoCAD Plant 3D,
AutoPlant, CATIA, SolidWorks, CADWORX, etc. https://www.sstusa.com/check-stress.php
For details visit:
• Race for increased production and plant efficiency has
prompted plants to operate at much higher pressures and
temperatures, resulting in thicker pipes with higher
stiffnesses and thermal stresses.
• So, 3D designers need a product to “check piping flexibility
and stresses” at design stage.
• Simple and elegant, checkSTRESS with graphically intuitive
interface helps designers produce code-compliant piping
layouts in the first iteration, dramatically reducing project
execution time.
• 3D Designers lay out pipe routing considering Space availability, Construction, Operation
and Maintenance requirements; most often, they do not foresee flexibility requirements.
• Stress Engineers perform flexibility analysis and recommend rerouting wherever
required.
• This iterative process between designers and stress engineers continues until all stress
requirements are met.

17. HOTclash
• As the name suggests, HOTclash assures no
clashes between a pipe and nearby pipes,
structures, equipment, cable trays, ducts,
supports and others.
• By quickly transferring the 3D “deformed” shapes
to Plant models in E3D, PDMS and CADMATIC
under the following conditions:
• Operating
• Shut-down and
• Hydrotest
• Avoid any "post-commissioning" shutdown and
repairs due to clashes during HOT Operating
conditions.
Review of any pipe clash after transferring “deflected shape” of pipe under hot operating condition.
https://www.sstusa.com/hot-clash.php
For details visit:

18. dataTRANSLATORS
• Our dataTRANSLATORS can import piping
layouts from various 3D Plant Design
software to CAEPIPE 3D+.
• Leave the grunt of work to
dataTRANSLATORS, saving time by not
having to reinput the data.
• Automated data transfer reduces human
errors thereby avoiding unnecessary
glitches and additional costs.
• Export un-deformed layouts to E3D,
PDMS & CADMATIC for ease of re-routing
in 3D plant models.
https://www.sstusa.com/data-translators.php
For details visit:

19. Interfaces
CAEPIPE also interfaces with Stress,
Flow and Isometric software.
• Import and export piping models
with CAESAR II.
• Import and export piping models
with FLOWMASTER.
• Import Fluid transient data from
PIPENET and FLOWMASTER.
• Export stress models to nuclear
PIPESTRESS software.
• Export layout to ISOGEN.
Optional
Included

20. CAEPIPE 3D+, CAEPIPE, checkSTRESS, HOTclash and dataTRANSLATORS are trademarks of SST Systems, Inc.
CAEPIPE 3D+ is a bundled package consisting of CAEPIPE and
three plugin modules checkSTRESS, HOTclash and dataTRANSLATORS.
The Most Disruptive Pipe Stress Software!
www.sstusa.com | +1(408) 452 8111 | sales@sstusa.com
checkSTRESS
checkSTRESS
HOTclash
dataTRANSLATORS
What is CAEPIPE 3D+?

21. Dynamic Susceptibility - CAEPIPE
https://www.sstusa.com/pipe-stress-article-dynamic-susceptibility.php
For details visit:
What is Dynamic Susceptibility?
• The dynamic stresses are the dynamic bending
stresses associated with vibration in a natural
mode.
• The dynamic susceptibility for any mode is the
ratio of maximum alternating bending stress to
maximum vibration velocity.
• “Susceptibility ratio” provides an indicator of the
systems susceptibility to large dynamic stresses.
• Also, the associated animated mode shapes
include color-spot-markers identifying the
respective locations of maximum vibration
velocity and maximum dynamic bending stress.
References:
Hartlen, R. T, 1994, Dynamic Susceptibility Method for
Piping Vibration, Proc. 3rd Int. Congress on Air-and Structureborne
Sound and Vibration, Montreal, Canada.
Zeng, Lingfu, Lennart G. Jansson, and Alexander Börjesson. "Piping
Vibration and Vibration Damage Prevention Through Screening of Dynamic
Susceptibility." International Conference on Nuclear Engineering. Vol. 57808.
American Society of Mechanical Engineers, 2017.
• Dynamic Susceptibility Factor (DS) indicates the risk levels of vibration
in a piping system.
• It is a unique feature only in CAEPIPE and no other software.

22. Dynamic Susceptibility - CAEPIPE
• Clause A.2.7 of Code SS-EN 13480-3:2017/A3:2020 even refers to Dynamic
Susceptibility implemented in CAEPIPE for vibration assessment.
• As per Code, the possible usage of the Dynamic Susceptibility is in the
design phase, commissioning and operation, measuring and screening
vibrations.
https://www.sstusa.com/pipe-stress-article-dynamic-susceptibility.php
For details visit:

23. • Stress reports are formatted, indexed and well
organized in CAEPIPE.
• Results including support load summary can be
exported in CSV format for the Structural
Design team and Vendors.
Stress Report in CAEPIPE

24. CAEPIPE Review (Viewer)
https://www.sstusa.com/review-software-download.php
Pipe
Stress
Model &
Results
Supervisor
Client
Vendors
Stress
Analyst
For details visit:
• We understand that designing industrial systems requires teamwork.
• Supervisor, client and vendors need to review the layouts and stress
reports of piping systems during design & construction phase of a
project.
• Just like the PDF reader, CAEPIPE Review is a reader which also
allows reviewing results graphically instead of reading text reports
only.
• CAEPIPE Review is distributed FREE of license fees.
• You can also review models from CAESAR II, AutoPIPE & PipePAK
through CAEPIPE Review.

25. FAST & Efficient
CAEPIPE has Superior FEA Solver
Topics of discussion:
• Simulation Speed
• Dynamic Analysis
• Time History Analysis

26. Unparalleled Simulation Speed
• Stiffness matrix of a piping system is a banded matrix with zero off-band
elements (called skyline matrix).
• CAEPIPE solver is specifically written for skyline matrix from the core and
no linear algebra packages for the dense matrix are used.
• Thus, CAEPIPE performs analysis much faster than any other software
and the memory required is minimal.
• Convergence of solutions for models with nonlinearities is faster in
CAEPIPE.
• CAEPIPE computes natural modes rapidly with frequencies up to 9999 Hz,
thereby making dynamic analyses much more accurate for any size of
pipe stress models.
• Dynamic analysis by CAEPIPE has unparalleled speed and accuracy.
Static Analysis:
Dynamic Analysis:
Modal Solution:
Skyline matrix

27. • Formatted results are summarized
for all load cases, including
Dynamic load cases.
• Integrated Dynamic Analysis has
unparalleled speed and accuracy in
CAEPIPE.
Dynamic Analysis is Integrated in CAEPIPE
• Static and dynamic analyses are performed together in CAEPIPE.
• Dynamic loads such as Time history loads, Harmonic loads, Spectrum loads, others can be
applied conveniently in the layout window while viewing the graphic model and data.
Layout Window
Supports load summary for both static and
dynamic load cases.
Dynamic loads are applied conveniently in layout window.
Select static and dynamic Load cases for
the analysis.

28. Dynamic Analysis by C-II
• Dynamic analysis is NOT integrated with Static analysis; instead, a
separate module must be used.
• Defining load is challenging in the separate module when the
piping model (Graphics window) is not visible on the screen.
• The user must first note down node numbers of all bends and
corresponding Time history loads with directions (typically 10+).
• Entering Time history data requires adding many rows by pressing
the + key (typically 10+, a time-consuming process).
• Separate results are output for static and dynamic analysis;
manually combining those results to arrive at Support load
summary is a tedious process.
• In summary, the Dynamic analysis user interface is cumbersome
and unattractive.
Module for Dynamic loads in C-II

29. Time History Analysis
• Equation of motion subjected to dynamic loading can be
solved by Modal time-history analysis.
(1)
• The equations of motion can be de-coupled into n single-
degree-of-freedom equations in terms of the modal
displacement vector {u}.
(2)
(3)
with i = 1,2,…n is a system of n independent degree of
freedom.
• These are solved using the Wilson θ method, which is an
unconditionally stable step-by-step integration scheme.
• The displacement vector can be calculated precisely with a
reduced order model
where m is number of modes considered.
Modal Time History Analysis Theory
Accuracy and efficiency of modal time history analysis depend
on the number of modes that will contribute to the total
response of the system.
• Modal analysis in C-II is slow. Solution
fails when higher modes are included
for large models with Time History
loads data.
• For fluid transient events, frequencies
up to 600 Hz may be of interest,
which is practically not feasible to
consider in C-II even for a medium
size piping model.
• So, C-II is mostly used for Static
Analyses and for response spectrum
seismic analysis where modes below
33 Hz are of significance.
• Modal analysis in CAEPIPE has
unparalleled speed and accuracy.
• CAEPIPE computes natural modes
very rapidly with frequencies up to
9999 Hz, thereby making dynamic
analyses much more accurate for any
size of pipe stress models.
• Furthermore, automatic meshing is
available to improve the accuracy of
modal analysis at higher frequencies.
• So, CAEPIPE can perform accurate
Dynamic analysis for any size of piping
models with various types of Dynamic
loads.
CAEPIPE 3D+ C-II

30. • Save man-hours and avoid errors by generating stress models from 3D plant
• Reduce layout iterations between design and stress departments
• Check for clashes under HOT operating condition
• Save drafting man-hours by providing immediate visualization of 3D plant model for stress engineers
• Deploy one tool to perform first-level stress checks and detailed analyses
• Reduce software license cost as CAEPIPE 3D+ can be used with many 3D Plant Design systems
• Save man-hours by importing layout changes into 3D plant model for re-routing and updating supports as per finalized stress
models
Benefits of CAEPIPE 3D+

31. General Comparison
CAEPIPE 3D+ vs C-II
“What is right is not always popular and what is
popular is not always right.” Albert Einstein

32. Capabilities
Analysis CAEPIPE C-II Remark
Statics
Deadweight of Pipe and all its components  
Operating fluid  
Hydrotest  
Snow  
Lining and Cladding  
Multiple thermal & pressures cases 11* 9 * including Design Case
Thermal movement of Nozzles & Anchors  
Static external loads  
Static equivalent Seismic Analysis  
Seismic displacements (at supports)  
Building Settlement (at supports)  
Multiple Winds (4)  
Wave load X 
Fatigue load case X 
Impact Test for applicable codes *  * ASME B31.5
Creep for applicable codes *  *EN 13480-3, SNCT
Bourdon Effects  
Flange Check  
Automatic load cases and combinations  X
User defined load cases X 

33. Capabilities
Analysis CAEPIPE C-II Remark
Dynamics
Modal analysis  
Harmonic loads (e.g., pump excitation)  
Time history loads (e.g., slug flow, fluid hammer, relief valve)  
Force spectrum for impulsive load  
Uniform Response spectrum (RSA)  
Independent Support Motion/Multi-level RSA  

34. Capabilities
Elements CAEPIPE C-II Remark
Element types
Pipe  
Above/Below Ground  
Metal  
PVC  
FRP  
Beam  X* * C-II : separately licensed
Bend/Miter bend  
Valve  * * Modeled as RIGID
Reducer  
Bellows  
Slip Joint  X* *need modeling
Hinge Joint  X* *need modeling
Ball Joint  X* *need modeling
Cut pipe  
Elastic element  X
Jacketed Pipe  X
Jacketed bend  X
Tie Rod  X
Rigid Element  

35. Supported Codes
Code CAEPIPE C-II Remark
Power
ASME B31.1 (Power piping)  
ASME B31.9 (Building Services)  
ASME B31.5 (Refrigeration piping)  
European EN 13480-3  
TBK 5-6 (Norwegian)  
Stoomwezen (Dutch)  
Swedish  
Process
ASME B31.3 (Process and refinery piping)  
BS 806 (British)  
CODETI (French)  
European EN 13480-3  
JPI, HPGSL X 
Nuclear
ASME Section III Subsection NC - Class 2 (Nuclear piping)  
ASME Section III, Subsection ND - Class 3 (Nuclear piping)  
RCC-M C and D  

36. Supported Codes
Code CAEPIPE C-II Remark
Offshore/Pipelines
ASME B31.4 (Liquid Petroleum Transportation)  
ASME B31.8 (Gas Transmission and Distribution)  
Z-183  X
Z-184  X
Z662 (Canadian)  
DNVGL-ST-F101 X 
PD 8010 X 
FRP
ISO 14692 X 
UKOOA X 
BS-7159 X 
Equipment/ Components
NEMA SM-23 (Turbines)  
API 610 (Vertical & Horizontal)  
API 617 (Compressors)  
ANSI /HI 9.6.2 (Rotodynamic Pumps)  

37. Supported Codes
Code CAEPIPE C-II Remark
Equipment/ Components
WRC 107/537/297  
API 560, 661 X 
HEI X 
B31G X 
AISC X 
Nozzle evaluation (ASME Sec VIII Div 2)  
Nozzle Allowable load Calculation (EN13445-3)  X
Lug Evaluation (ASME Sec III Div 1, Subsection NC)  X
Lug Evaluation (ASME Sec III Div 1 Subsection ND)  X
Lug Evaluation (EN 13480)  X
Flange Check
Flange & Bolt Stresses (ASME Sec VIII Div 1)  
Flange check per EN 1591-1 X 
ASME Sec. III Div.1, Subsection NC3658.3  
Equivalent Pressure Method  
Pressure Design
Pressure Design (EN 13480-3)  ?* *Unknown

38. Supported Codes
Code CAEPIPE C-II Remark
Environmental
Seismic Calculation (ASCE 7-16)  
Wind Force Calculation (ASCE 7-16 and EN 1991-1-4)  
IBC, UBC, GB50009, Mexico NBR 6123, IS875 X 
BS 63399, As/Nzs 1170, KHK L1 X 
Others
Stress Isometric Generation X * *still deficient
Formatted Report  X

39. Interfaces
Code CAEPIPE C-II Remark
CAD Software
CADWorx Plant  
SmartPlant 3D  
PDS  
Import PCF  * *requires manual editing
E3D  X
PDMS  X
CADMATIC  X
TRIBON  X
Hydraulics
BOS Fluids X 
AFT Impulse X 
Pipenet  
LIQT X 
Pipeplus X 
Flowmaster  

40. Request a free trial
https://www.sstusa.com
SST Systems, Inc.
1798 Technology Drive, Suite 236
San Jose, CA 95110 USA
Phone: +1 (408) 452-8111
Fax: +1 (408) 452-8388
Visit: sstusa.com
Pipe Stress Analysis Software - CAEPIPE
Pipe Stress professionals’ choice of software
Give it a try !!
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