Paulin Research Group will offer several webinars that discuss various subjects of interest
to piping and pressure vessel designers and engineers. Presentation times are typically
scheduled for thirty minutes or less and attendees are encouraged to submit questions during
and after the webinars.
Please note that attendee email addresses are used for PDH verification. All requests for
PDH certificates will be vetted against the attendee email address list. Each participant
wanting a PDH certificate must attend under their own email address and not as a group.
Piping and Vessel Problems to Avoid – Examples (part 2)
Presenter: Tony Paulin, P. E.
Tuesday, May 13, 2008 9:00 AM (Houston time) Convert to your local time
Thermal cycles and their effect on fatigue failure and design are discussed. Inspection
based reduction of SIFs is covered numerically so that users understand which parts of
B31.3 Chapter VI - Inspection, Examination, ... can be used to reduce stress
intensification factors.
Comment
|
FE107, FESIF and the Piping Checklist (Repeat)
Presenter: Casey Barlow and Fred Hendrix
Thursday, May 15, 2008 9:00 AM (Houston time) Convert to your local time
Using PRG software tools to remove uncertainty in stress analysis.
Register to attend
|
Piping and Pressure Vessels – When to Worry – Examples”
Presenter: Tony Paulin, P. E.
Tuesday, May 20, 2008 9:00 AM (Houston time) Convert to your local time
Cumulative effects that are all detrimental to system survival are quantitatively
discussed. Examples are shown demonstrating how real safety factors can be less
than unity. Ways to avoid potential problems with in these cases are recommended.
Critical components can be moved or reoriented to reduce the probability of failure.
Register to attend
|
CAD and Pipestress
Presenter: Tony Paulin, P. E.
Tuesday, May 27, 2008 9:00 AM (Houston time) Convert to your local time
There are common errors made when CAD models are converted into analysis models.
The errors are not unique, but the CAD conversion process seems to exacerbate
these issues. A list, discussion and examples are presented.
Register to attend
|
Pipe & Pressure Vessel Ethics – Conditions of Disagreement
Presenter: Tony Paulin, P. E.
Tuesday, June 03, 2008 9:00 AM (Houston time) Convert to your local time
With variations in the Codes and discussions of code accuracy and safety, a point may be
reached where an engineer must voice opposition to designs when he believes they will
jeopardize the safety of the public, plant personnel, or the owners investment. Methods
for voicing these concerns and ethical requirements are discussed.
Register to attend
|
Common Piping Errors and Ways to Avoid Them
Presenter: Tony Paulin, P. E.
Tuesday, February 26, 2008 9:00 AM (Houston time) Convert to your local time
There are several common procedural and analytical errors associated with
pipe stress analysis. Mr. Paulin, the original author of CAESAR II, shares his
experiences regarding piping errors and how to avoid them. Procedural errors involve
user checking and program assumptions. Analytical errors involve situations where users
omit certain model characteristics and obtain results that are either conservative or
non-conservative. Mr. Paulin discusses those characteristics and when they are most
important. Large diameter pipe and seismic analysis are mentioned to be major areas of
concern.
Comment
|
PVP Failure vs. Calculation and a Common Problem
Presenter: Tony Paulin, P. E.
Tuesday, February 26, 2008 10:00 PM (Houston time) Convert to your local time
The Paulin Research Group (PRG) lab in Houston Texas conducts numerous fatigue and
burst tests in all cases comparing the results to actual ASME Code predictions.
Mr. Paulin demonstrates the range of typical safety factors and addresses items that
can affect the magnitude of those safety factors. Pictures of common failures are
shown. Stiffness effects of large diameter pipe are shown causing problems with
rotating equipment and eliminating problems with nozzle loads.
Comment
|
New Aspects 2007 ASME Section VIII Div 2
Presenter: Tony Paulin, P. E.
Thursday, February 28, 2008 9:00 AM (Houston time) Convert to your local time
Several aspects of the 2007 version of ASME Section VIII Division 2 are discussed.
Part 4 - design by rule and part 5 design by analysis are contrasted, and ASME
Section VIII Division 1 rules are contrasted with some ASME Section VIII Division 2
Part 4 rules. Opportunities for Code users to size a vessel thickness based on
analysis is discussed. An estimated cost savings for one thick walled reactor
analyzed by PRG is given.
Comment
|
Fatigue Design with ASME and other Worldwide Codes
Presenter: Chris Hinnant
Tuesday, March 04, 2008 9:00 AM (Houston time) Convert to your local time
Numerous fatigue design methods exist in today's pressure equipment design codes.
Codified methods include provisions for non-welded and welded regions of pressure
equipment. This discussion will highlight important considerations when designing
for cyclic service and differentiate the various fatigue design methods available
to the practicing engineer. In addition, revisions to the ASME fatigue design
methods in the 2007 Section VIII, Division 2 will be discussed.
Comment
|
Analytical Gasket Properties and Leakage
Presenter: Tony Paulin, P. E.
Thursday, March 06, 2008 9:00 AM (Houston time) Convert to your local time
Different types of gaskets and their characteristics are discussed. Tests
performed at Paulin Research Group are shown. A discussion of leakage is
provided along with how to relate leakage to flange analytical models. The
ROTT test is described and the method used to convert its results into gasket
mechanical properties is shown.
Comment
|
Part 2 Fatigue Design – Fatigue Evaluation with ASME Section VIII Div 2, 2007
Presenter: Chris Hinnant
Thursday, March 13, 2008 9:00 AM (Houston time) Convert to your local time
A review of the two fatigue design methods available in the 2007 ASME VIII
Division 2 code will be given. Differences between the methods and comparisons
with fatigue test data are discussed.
Comment
|
Beams (CAESAR, AutoPIPE, Triflex, etc), vs. Shells (WRC?) vs. Bricks (FEA) - Who's Right?
Presenter: Tony Paulin, P. E.
Tuesday, March 18, 2008 9:00 AM (Houston time) Convert to your local time
The accuracy of calculated stresses in beam, shell and brick (volumetric) analysis as it relates to
pressure vessels and piping is discussed. Examples are provided.
Comment
|
Part 3 Fatigue Design - Comparison of Fatigue Design Lives Using ASME, BS, and EN Design Codes
Presenter: Chris Hinnant
Thursday, March 20, 2008 9:00 AM (Houston time) Convert to your local time
A comparison of the allowable fatigue lives for some common weld geometries is given. ASME VIII-2, BS-5500,
and EN-13445 code methods will be directly compared based on their allowed fatigue
lives and compared against PRG experimental test data.
Comment
|
Rules of Thumb for Expert Analysis of Piping Systems
Presenter: Tony Paulin, P. E.
Tuesday, March 25, 2008 9:00 AM (Houston time) Convert to your local time
Risk based evaluations of piping systems are discussed. Some methods that
are typically used and the effect on the need for an expert analysis is
demonstrated by example. The impact on pipe stress analysis and the need
for model checking or model is illustrated.
Comment
|
What is 100% of the Allowable Stress for Pipes and Pressure Vessels?
Presenter: Tony Paulin, P. E.
Tuesday, April 01, 2008 9:00 AM (Houston time) Convert to your local time
There is a misconception by some that failure is imminent when the calculated
stress is at 100% of the Code allowable. Actual proximity to failure is discussed
for the B31 and ASME Section VIII Codes.
Comment
|
External Loads on Nozzles (Comparisons of WRC107, B31, EN13445, VIII Div2 and.Mean-Life-to-Failure)
Presenter: Tony Paulin, P. E.
Tuesday, April 08, 2008 9:00 AM (Houston time) Convert to your local time
A brief look at primary (weight and pressure), and secondary (thermal?) loads on nozzles
(and branch connections?) The discussion includes comparisons against failure, a
discussion of what failure means for each of the different loads, and how the different
Codes and documents deal with each particular failure mechanism.
Comment
|
External Loads on Nozzles (Comparisons of WRC107, B31, EN13445, VIII Div2 and Mean-Life-to-Failure) (Part 2)
Presenter: Tony Paulin, P. E.
Tuesday, April 15, 2008 9:00 AM (Houston time) Convert to your local time
Part 2 of this presentation covers non-typical nozzle constructions, including
those with large D/T, hillsides, pads, laterals and contributory pressure loads.
FEA methods for dealing with geometries that are well outside of WRC or B31
intended parameters are discussed.
Comment
|
FE107, FESIF and the Piping Checklist
Presenter: Casey Barlow and Fred Hendrix
Thursday, April 17, 2008 9:00 AM (Houston time) Convert to your local time
Using PRG software tools to remove uncertainty in stress analysis.
Comment
|
Buckling of Piping Components (Part 1a). Buckling of Pressure Vessel Components (Part 1b)
Presenter: Tony Paulin, P. E.
Tuesday, April 22, 2008 9:00 AM (Houston time) Convert to your local time
B31 Code rules do not include consideration for buckling due to external
loads on pipe or elbows. ASME Section VIII Division 2, 2007 - Part 4.4
Includes rules for various external loads on cylinders and vessel components.
Section VIII Code cases which form the basis of the rules will also be shown.
Extensions of the code case not written into the Section VIII Code (that have
application to piping will also be covered.)
Comment
|
FRP Pipe Failures and Lessons to Be Learned
Presenter: Hans Bos, Ph. D.
Tuesday, April 29, 2008 9:00 AM (Houston time) Convert to your local time
Dr. Hans Bos travels around the world for various operating companies and FRP pipe
vendors trouble-shooting installations and providing guidance for design. Dr. Bos'
company: Dynaflow Engineering has developed it's own plastic pipe support and design
specifications for both small and large bore FRP pipe.
Comment
|
Piping Problems to Avoid - Examples (Part 1)
Presenter: Tony Paulin, P. E.
Tuesday, May 06, 2008 9:00 AM (Houston time) Convert to your local time
Numerical examples demonstrating a number of the issues addressed in previous webinars are
provided. Mr. Paulin discusses how to avoid these pitfalls, and gives a quantitative
understanding of the types of errors that can be produced. SIFs, flexibilities, and
friction are addressed specifically. The user is shown how to determine when SIFs and
flexibilities can be important.
Comment
|