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  1. proinwv2

    B16.34 Wall

    The 2/3 value that I refer to, is in para. 6.1.3 for sections beyond the [1.1(dtm)^.5]region. Paul www.ostand.com
  2. proinwv2

    B16.34 Wall

    Consider a valve body for inline flow simply described as three coaxial cylinders. An inlet, central body and an outlet. All round and the inlet/outlet of the same diameter. The Central body is a larger diameter. My question is when determining the wall of the central body, do we not use 2/3...
  3. proinwv2

    Tank design - use of FA with tank blanketing

    After reviewing the appropriateness of a FA, or any safety equipment, I would suggest that the implications of failure be considered and also look at the cost of an installed FA vs. the values of the equipment, the stored product, the facility and not least human life and safety. I think we...
  4. proinwv2

    Engineering Handbooks

    If the budget is really tight, don't ignore buying used books. Abebooks.com and Alibris.com are excellent sources for locating tech books. After all is said, the new books become used and basic tech books are really fundamental and useful for years. Paul www.ostand.com
  5. proinwv2

    laminar flow in an annulus

    I want to thank all for your answers, and I do have TP-410 but have been suspicious of their equation. I don't have access to the reference mentioned by Latexman. My annulus is quite small, a fraction of an inch in diameter and using the method described in the faq I get an effective diameter...
  6. proinwv2

    laminar flow in an annulus

    I have need to determine laminar flow in an annulus, and I am not sure what to use for the diameter (hydraulic diameter). My references tell me that hydraulic radius or diameter is not applicable to laminar flow. So my question is what "diameter" should be used to calculate Re as well as flow...
  7. proinwv2

    Emergency vent sizing for ATM Tank - API 2000

    I would suggest that a fire can cause the tank contents to boil, and raise the pressure in the tank, if adequate venting is not available. Careful consideration should be given to this. API 2000 6th edition in para. 4.3.3.3.2 has an equation for determining the required venting capacity, based...
  8. proinwv2

    Applicable ASME Bolt Material for -36¦C/ >193.3MPa

    To my knowledge, SA 307B is limited to -20F (-29C) and the allowable stress is 7,000 psi (48MPa). (ASME VIII Div 1 and ASME II, D) Am I missing something here? Paul www.ostand.com
  9. proinwv2

    Bulge in vertical storage tank

    I am not familiar with these codes so please bear that in mind. What I am is curious about this situation. Considering the value of such a large tank, would the following offer a sensible way to evaluate the tank condition, if it is not contrary to a code? Using NDT evaluate the shell at the...
  10. proinwv2

    Galling of SST

    strider6 Thanks for the UK information. Paul www.ostand.com
  11. proinwv2

    Galling of SST

    monkeydog and RPstress These are helpful. I quick read shows me that this is similar to what was in the pub. that I referenced. I will also continue to try to collect (recollect) some of that information. Thanks to both of you. Paul www.ostand.com
  12. proinwv2

    Galling of SST

    Yes, I could not find it online. Being it is the weekend, I cannot call until tomorrow. It is a shame in that many companies have stopped publishing on paper, but they did not put these valuable resources on line either. But then, I am the one who lost his copies..... Paul www.ostand.com
  13. proinwv2

    Galling of SST

    AT one time I had a series of publications from Carpenter, one of which dealt with the Galling of Stainless Steels. It described the performance of different combinations in contact. I have no idea what happened to them. Does anyone know if this publication is available anywhere, or even...
  14. proinwv2

    AVGAS viscosity

    Here is my source. See p. 4. Paul www.ostand.comhttp://files.engineering.com/getfile.aspx?folder=2d8896e9-f444-4400-9ed1-e696b81ccf58&file=avgas_100_ll_s13001.pdf
  15. proinwv2

    AVGAS viscosity

    jmw Thanks for the spreadsheets. They look interesting. I shall see what I can do with them. But my viscosity is about 1cS at 40C so that one will not work. Paul www.ostand.com
  16. proinwv2

    Avgas specifc gravity at lower temperatures

    Well I need a more general information, as the original batch is gone. I did find this though, if anyone is interested. http://www.tc.gc.ca/CivilAviation/publications/tp14371/RAC/3-0.htm#3-5-2 Paul www.ostand.com
  17. proinwv2

    Avgas specifc gravity at lower temperatures

    I need to find the specific gravity of avgas at low temperatures. Any thoughts where such data might exist? Paul www.ostand.com
  18. proinwv2

    AVGAS viscosity

    As an FYI I can find the viscosity at 20 and 40C on data sheets. Since no other data was available, I used a curve in Chemical Engineers Handbook to predict the viscosity at my lower temperature. I also need the s.g. at a lower temp so I will post that question now. Paul www.ostand.com
  19. proinwv2

    AVGAS viscosity

    I am looking for information on the kinematic viscosity of AVGAS 100LL versus temperature. In particular I wish to find it at temps below ambient. Has anyone point me to where I might find this? Thanks! Paul www.ostand.com
  20. proinwv2

    MIL-R-5315

    Thanks, this helps. I wonder why I cannot find the MIL spec? I can find MIL-P-5315 which has been replaced by AMS-P-5315. Curious to say the least. Paul www.ostand.com

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