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  1. AWDMIKE

    Versions of ASCE 7 for Section VIII, Division 1 Vessels

    I have also run into this situation and I would guess it happens on occasion in the USA since ASCE 7 is the only environmental load standard referenced. Updated local building codes may lag the IBC model code issuance by 1-2 years. If a project starts towards the end of a building code...
  2. AWDMIKE

    Is there an Alternative to the Casti Metals Black Book?

    Recently, a co-worker shared with me a Casti Metals Black Book. I wasn't aware of such a book and I would love to have this as a resource. I'm curious, is there something similar which is a bit more updated and maintained (maybe by someone like ASTM) that lists all the ASTM specs into various...
  3. AWDMIKE

    TEMA 8th Edition, Table D-5M Metric Bolt Root Area Verification

    I spent some of my holiday vacation verifying the bolt root area in TEMA 8th Edition, Table D-5M. I realize the 8th edition is quite old, but it was the only one I had access to during the holidays. It was quite an effort and I hope it helps someone. I used the procedure as outlined in the...
  4. AWDMIKE

    2018 Pressure Vessel Design softwares

    As an engineering contractor, I can tell you from much experience that Compress is easier (for me) to follow when reviewing calculations. For the most part, Compress and PV Elite are quite transparent in their calculations. There are few things which I see on a regular basis needing attention...
  5. AWDMIKE

    Equipment design and manufacture standards

    Most of the clients I've worked for have their own massive library of specifications which need to be followed for many types of equipment. Within the oil and gas industry, there is a set of specs titled "Process Industry Practices" that may be helpful if you are in that industry. I've been on...
  6. AWDMIKE

    Div 2 Class 2 analysis.

    A couple of years ago there was a training course in southern California on Div. 2 (I think). Would be nice to see one down here again but they all seem to be in Houston or Calgary.
  7. AWDMIKE

    ASCE 7-10 for pressure vessel: a guide?

    We're up to ASCE 7-16 now, however, check your building codes since some of them still make reference to ASCE 7-10. The following documents may be of assistance: ASCE 41140-2011 Guidelines for Seismic Evaluation and Design of Petrochemical Facilities ASCE 41180-2011 Wind Loads for Petrochemical...
  8. AWDMIKE

    MathCAD Prime Express 4.0

    I am under the impression that soon enough MC15 is going to no longer be supported, and therefore I might as well start converting my files over to Prime as soon as possible. I suppose there is a converter but I have not used it as of yet. I am not a power user of any Mathcad with about 100...
  9. AWDMIKE

    Div. 3 - monobloc

    I'm only somewhat familiar with Division 3 but here's what I can find. My understanding of the term monobloc is that it is a solid vessel wall which has been fabricating by a forging. I believe though that the term is reserved for any "solid wall" which is not layered. Apparently it's not that...
  10. AWDMIKE

    Vertical response spectra

    There are provisions for establishing a vertical elastic response spectrum in EN 1998-1. Also I know that the Mexican code (MDOC-CFE) has similar provisions. If I recall the two are not identical. When I was working on a project that used the MDOC-CFE I recall finding several references to a...
  11. AWDMIKE

    Column bottom course thickness

    As you suspected it can be due to static head of liquid. Wind (as noted above), seismic loads, and vertical loads can have more of an impact on lower shell courses.
  12. AWDMIKE

    Bolt preload vs failure in shear

    While I glossed over some of the middle of this thread, I caught the end of it and wanted to throw something out there. Some time ago I had a discussion with a structural engineer on anchor bolts / anchor rods who mentioned that under a shear load the effect of Poisson's ratio was to elongate...
  13. AWDMIKE

    Rectangular Tank Design Flat Plate Ratio Inconsistencies

    I took a closer look at your post and wanted to reply again. My version of Megyesy (12th Edition), page 213, references two documents, one is a publication and the other is a Timoshenko textbook. I'll attach the publication herein. It's very old, from 1936, and to my knowledge cannot be...
  14. AWDMIKE

    Using Von Mises to size welds

    I am very interested to see where this post goes. Recently I have had to size several welds and found myself asking some of the same questions. Even referencing AISC 360-16 if you have a fillet weld the specification only has criteria for shear in the weld, and states that "tension of...
  15. AWDMIKE

    Rectangular Tank Design Flat Plate Ratio Inconsistencies

    While I've never designed a rectangular tank, I would look into something developed for industry while at the same time referring to those books. If you can't find anything in any tank standards, have a look at API Bulletin 2V Design of Flat Plate Structures.
  16. AWDMIKE

    ASME U2 stamp and singed UDS

    Hopefully someone with more 2017 Division 2 experience will respond herein, but to my knowledge there are now two classifications within Division 2, both of which requires a UDS to be developed but only one of which needs to be stamped by a certified engineer. I believe the answers to your...
  17. AWDMIKE

    ASME B16.5 1977 and A181 gr 1

    There was also a table for hydrostatic test pressure, but you appear to already have the correct value.http://files.engineering.com/getfile.aspx?folder=8ca4e4ca-64b9-4282-8e77-8b19b06b1922&file=ANSI_B16.5-1977_Table_3.jpg
  18. AWDMIKE

    ASME B16.5 1977 and A181 gr 1

    Forgot to attach second file. http://files.engineering.com/getfile.aspx?folder=09a58b11-1cc6-4588-9a66-39087d9dd99b&file=ANSI_B16.5-1977_Table_1A.jpg
  19. AWDMIKE

    ASME B16.5 1977 and A181 gr 1

    I'll attach both Table 1A and Table 2-300 for ANSI B16.5-1977. In those days (well before my time) the tables were separated by Class. Since you wanted 620 psi I'm assuming you need Class 300. The answer is "Yes" and FYI they referred to it as A181-I (not a "dash one", but a "dash eye"...
  20. AWDMIKE

    How is a Field Hydrostatic Test Performed?

    Aside from identifying a fill, drain, and vent point for any vessel (horizontal or vertical), how is a field hydrostatic test (or field hydrotest for search engines) performed in terms of how the water is filled? Some of the questions I have are a bit scattered, but not having been part of a...

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