Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by ShwaZmoto

  1. ShwaZmoto

    Pressure vessel repair

    metengr, "Simply to refer back to the original edition and addendum is not necessarily the safest condition" I did not say that it was. I said: "most shops will do this and take a conservative approach." For carbon steel vessels and boilers, due to the decrease in the design factor from 4...
  2. ShwaZmoto

    Pressure vessel repair

    metengr, You are correct. Engineers can do anything they want under U2(g), so as long as they are not in violation of local law and can convince their allied inspector to sign off on the repair or alteration. However, most reputable shops will not do this. At a minimum, the original ASME...
  3. ShwaZmoto

    Pressure vessel repair

    From "Pressure Vessels: the ASME Code Simplified," "When an alteration is made to a vessel, it shall comply with the section of the ASME Code to which the original vessel was constructed to conform." The last R shop I worked at kept every single revision of the code dating back to the early...
  4. ShwaZmoto

    Pressure vessel repair

    Keep in mind the repair must be made in reference to the year and code by which it was designed, i.e. if it was designed under 1962 Section VIII Div 1 code, then it must also be repaired under that same code. Your R stamped ASME repair shop will know to do this. Also, if the vessel is a PWHT...
  5. ShwaZmoto

    Dual Dimensions on a Section VIII Div 1 Vessel

    Thanks for the advice. I've never designed vessels for Canada, only the US, and I don't have a copy of Section VIII Div 1 in front of me (I'm not the fabricator). I just remembered that section of the code that states, "it is expected that a single system of units shall be used for all aspects...
  6. ShwaZmoto

    Dual Dimensions on a Section VIII Div 1 Vessel

    I'm sub-vending some metric vessels for a project in Canada and can't quite remember the rules regarding dimensions and units. If I remember correctly, the use of dual dimensions on shop drawings and/or in calculations is prohibited by ASME Section VIII Division 1, correct? Also, since these...
  7. ShwaZmoto

    Matlab NARX with multiple inputs

    thread575-155285 I realize this is a bit late, but hopefully this may save someone else a headache in the future. It's currently 2010 and Matlab's documentation on this subject still isn't any better than it was in 2006. Instead of doing something like this: a={[0.1] [0.2] [0.3] [0.4] [0.5]...
  8. ShwaZmoto

    Seismic Design Force

    First, I must say that this is not a criticism of Compress, but just an observation. Compress does a fantastic job, and is an excellent piece of software. I did, however, notice something peculiar about Compress and the way it calculates the seismic design force, Fp, using equation 13.3-1 from...
  9. ShwaZmoto

    Missing Seismic/Wind Inputs in Build 6258

    Thanks for the prompt answer, Tom! I'm posting Tom Barsh's reply here for others who may come across this same issue. ============================= COMPRESS provides inputs for the S1 spectral response acceleration, response modification coefficient R, and long-period transition period TL, as...
  10. ShwaZmoto

    Missing Seismic/Wind Inputs in Build 6258

    In regards to Seismic inputs for horizontal vessels using building code IBC 2006 ground supported (or ASCE 7-05 ground supported) in Compress Build 6258 implementing ASME Sect VIII Div 1, can anyone tell me where to set the inputs for "spectral response acceleration over 1 second period" and...

Part and Inventory Search