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Recent content by FoxRox

  1. FoxRox

    Water Softener Regeneration Qestion

    bimr, thank you for that link. That is exactly what I was looking for. Much less salt usage but only slightly harder water. Now I just need to find a softener that has all those "advanced" settings that I can tweak until I figure out what softens "good enough" but does not negatively affect the...
  2. FoxRox

    Water Softener Regeneration Qestion

    Thanks for the reply. The house is only eight years old, but I just bought it last year. I don't believe the softener was installed initially, but I don't know exactly when it was. Either way, it cannot be too old. It is a Sterling NES Series if that tells you anything. The softener does...
  3. FoxRox

    Water Softener Regeneration Qestion

    I am trying to figure out if it is possible to "tune" a water softener to produce less brine when it regenerates by sacrificing some of the effectiveness. When a water softener regenerates, what is target "completion" for backwashing out all the calcium and magnesium ions? 100%? 99%? 90%? Do...
  4. FoxRox

    ASME BPVC VIII-1 UG-22(g) Submarine testing vessel

    LittleInch, that is a good point. A full implosion may not even be possible. Once buckling begins, gauge pressure in the test vessel should go to zero. The pressure wave caused at the end of an implosion may never even occur. You have me questioning if this is even a problem at all... But what...
  5. FoxRox

    ASME BPVC VIII-1 UG-22(g) Submarine testing vessel

    Yes, I had thought of this, and I agree with you that a larger Vtv/Vs would mitigate the effects of the implosion. Unfortunately, it would also be much more costly. For reference, I am looking at a sub close to eight feet in diameter, and the test pressure needs to be over 700 psi, so you can...
  6. FoxRox

    ASME BPVC VIII-1 UG-22(g) Submarine testing vessel

    A submarine is to be enclosed inside a larger pressure vessel. The space inside the vessel and outside the submarine is filled with water, and a hydrotest is performed to test the sub. If the submarine implodes, what loads affect outer vessel? I am thinking of something occurring like in the...
  7. FoxRox

    ASME VIII note 35 + Corrosion Allowance 0 + API 510 Inspection Code = Instant re-rate?

    Extra shell thickness above the minimum required is often (almost always) used as credit for opening reinforcement, so it would not be valid to consider that as after-the-fact corrosion allowance. Not to mention the effect CA has on weld sizes. CA must be included in the original calculations...
  8. FoxRox

    Thread repair in studding outlet ASME BPVC VIII-1

    Thank you all kindly for the replies. ASME PCC-2 has an article specifically for this problem.
  9. FoxRox

    Thread repair in studding outlet ASME BPVC VIII-1

    Female threads in studding outlet got cross-threaded. Original threads are not salvageable. It is a very large flange. Replacing is possible but only as a last resort. Repair would be preferred. Does code have rules for how this can be repaired? NBIC Part 3 has a section (S2.13.14.1) for...
  10. FoxRox

    PIP VESBI002

    I appreciate the replies from everyone. Lots of good info. I'll be looking into the resources mentioned and not wasting my time with the PIP standard.
  11. FoxRox

    PIP VESBI002

    PIP VESBI002: Design and Fabrication of Bulk Solids Product Containers Is anyone familiar with this standard? The description says "Containers... shall generally be designed in accordance with the philosophy and requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division...
  12. FoxRox

    Is Corn Based Ethanol Good or Bad for Global Warming

    Ethanol is a shameful misuse of resources, the most important of which is water. I believe ethanol would have gone by the wayside years ago if not for our ridiculous presidential primary races. Winning the early primary race in Iowa is seen as a nearly mandatory stepping stone to the...
  13. FoxRox

    API 620 roof joint tension / bending stress

    MJCronin, thank you for your concern, but as I said in my OP, the rest of the silo is designed per ASME VIII-1. The bottom is a cone with a 30 degree apex angle. Until the cone roof came into the picture, the whole thing was designed to ASME, with the top head being torispherical. I only turned...
  14. FoxRox

    API 620 roof joint tension / bending stress

    I appreciate the replies. You guys have perfectly articulated both sides of the conflict in my mind.
  15. FoxRox

    API 620 roof joint tension / bending stress

    I am working my way through a cone roof design for a 12' diameter silo rated to 14.9 psi. I am using API 620 as a design basis, although the silo will not be stamped / monogrammed to any standard. The rest of it is designed per ASME Section VIII, but I've been asked to explore a shallow cone...
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