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  1. TGS4

    ASME BPV VIII-1/VIII-2 - External Loads on Standard Flanges - An Update

    Last year, Interpretation BPV VIII-1-16-85 was issued that stated This caused much consternation in the pressure vessel and piping community because there was no "official" method to to perform such calculations. All that was available was the "Equivalent Pressure Method" whereby the internal...
  2. TGS4

    2017 Edition of the ASME Boiler and Pressure Vessel Code is Available

    Please see thread292-427229 and keep all discussions there. All replies in this thread will be red-flagged.
  3. TGS4

    2017 Edition of the Boiler and Pressure Vessel Code is Available

    I'm not sure if IHS or other providers has it available yet, but you can order directly from ASME. Lots of changes this time around. I am working on a blog post to summarize the changes in VIII-1 and VIII-2.
  4. TGS4

    Structural Analysis Software - Transfer From MIDAS to RISA

    I have a client that has used MIDAS for the structural modeling and analysis calculations. However, my engineer uses RISA. We want to do a thorough review of the calculations, and simply reviewing the .pdf output is not particularly efficient. What would be the most efficient and effective...
  5. TGS4

    MAPDL - lcoper,min/max/abmn/abmx - how does ANSYS do the comparison

    I am using Mechanical APDL to create load cases. I have several load cases (8) that I would like to perform a set of comparisons on. The lcoper command says that the operators min/max/abmn/abmx Does anyone here know exactly how this is done? I understand that the lcoper operations are...
  6. TGS4

    Climate Metrics - Temperature Averaging

    In our most recent "climate change" discussion, I made a point about temperature averaging that seemed to be misunderstood. Because of its importance (in my opinion), I wanted to make its own thread. It is clear to me that there is significant confusion about the cp of air and a global average...
  7. TGS4

    Import Point Cloud to a Shell Model

    I have a point cloud from some laser scanning that I want to use to generate a shell-element model in Abaqus/Standard. Does anyone know of any good third-party software or any good python scripts in Abaqus that will accomplish this import? My data consists of ~2million tuples of x,y,z point data.
  8. TGS4

    Global Warming Predictions, Computer Modeling, and Error Reporting

    It's been a while since we had a good AGW discussion here. I read an article yesterday that discussed the climate models and their error (in other words ±1%, 5%, 10%, etc). http://www.skeptic.com/the_magazine/featured_articles/v14n01_climate_of_belief.html I work with computer models (FEA)...
  9. TGS4

    ASTM or ASME Spec for 1.25Cr-0.5Mo in Strip form

    I have an application (insulation support system for a pressure vessel) where I need to use 1.25Cr-0.5Mo material. I need this material in 1/8" thick x 2" wide and 3/8" thick x 4" wide strips. I know that for this material, I have the specification for SA-387, Gr. 11, Class 2 for plate, but I...
  10. TGS4

    Python Scripting to Automate Corrosion Details - Help Finding Examples

    I have a CAE model, of a pressure vessel, that I have generated entirely within CAE (3D-solid model). I also have a set of thickness data on a regular grid showing a local-thin-area. I would like to automate the process of inputting the thickness information to generate this corroded model -...
  11. TGS4

    Educated Opinions on Climate Change - Is Warming Bad?

    After the first 5 discussions about AGW and now the thread about "ClimateGate", I wanted to start another thread about Climate Change. What I want to discuss are: 1) What are the impacts of higher temperatures? Let's run the what-if scenario - what if the IPCC guys are right and temperatures...
  12. TGS4

    Searching for an OLD German Material - BH54M

    We are searching for some material information about an old (1969) German made vessel, of which the shell is constructed from BH54M. The manufacturer was Ruhrstahl Apparatebau GmBH, out of Hattingen-Ruhr, Germany. I would appreciate it if anyone who recognizes this material, or even the...
  13. TGS4

    Creep-Regime Flange Design

    I wanted to poll the members of the forum on their opinions on this questions. We are currently designing a piece of pressure equipment for a design temperature of 1842°F. We are using a hot-wall design, and are using Haynes Alloy 230. There are no Div. 1 allowables at that temperature, nor...
  14. TGS4

    CAE - How to Select Unmeshed Cells?

    I have created a rather complex 3-D solid model in CAE, that has cells that are completely hidden from view (internal to the structure) due to partitioning. I have meshed all of the cells that I can see. However, when I submit the job, I get a warning that there are unmeshed regions in my...
  15. TGS4

    Index of maximimum value in random array

    I have an array called S, it is not monotonic, but essentially random. I have found the maximum value using the max(S) function. Now, I would like to know the index at which S is a maximum. I have searched through these eng-tips archives (best I could with the search tools available), and...
  16. TGS4

    SA-212 Grade B Mechanical Properties from 1965 Section VIII

    I have seen posted here values of the allowable stress vs. temperature for SA-212 Grade B - here, here, and here However, I would really appreciate it if those who have access to the 1965 Edition of Section VIII would also post the values of the Yield and Ultimate Stresses as a function of...
  17. TGS4

    Toroidal Coordinate System for ABAQUS/CAE

    I am hoping to create a toroidal coordinate system to help visualize/output some data for a FE model of a boiler-tube elbow. I have used ANSYS in the past, and know how to create a use a toroidal coordinate system in ANSYS. However, I have yet to figure out how to do the same in ABAQUS. I...

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