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Recent content by JohnBC

  1. JohnBC

    Double wall tank - Interstitial layer doubts

    Hi MJCronin and RVAmeche, Thanks RVAmeche for the explanation, this really gave me an idea on how to do this. MJCronin, the primary tank was indeed fabricated based on UL-58, using A36 and horizontal axis. Now I see factible creating the vacuum in the interstitial space with a double steel...
  2. JohnBC

    Double wall tank - Interstitial layer doubts

    Hello RVAmeche and MJCronin, RVAmeche Yes! You are right, that is exactly why I need to draw vacuum from the interstitial space. I read about it in "Handbook of storage tank system", where it says this: "A jacketed design employs a UL 58 primary tank encapsulated by a nonmetallic layer of...
  3. JohnBC

    Double wall tank - Interstitial layer doubts

    Hello everyone! I'm working on a construction of a storage tank of 10,000L, this is a double wall tank and here is where I have some trouble. I can't find any information regarding the interstitial layer that shall be vacuumed. My questions are: * What is the commercial name for this...
  4. JohnBC

    Help for design a rack and pinion please.

    IRstuff: No, this is not for school. drawoh: I did, but all books (at least the books that I have checked so far says assume pitch diameter and teeth number). I'm sorry if my question is too basic or too silly for this forum.
  5. JohnBC

    Help for design a rack and pinion please.

    Hi to all, I need some help, I have to design a rack and pinion, the only two parameters that I have are: linear velocity of rack and load to be drag by rack. What criteria should I have in mind to determine the most efficient: module, pitch diameter and teeth number (in rack and pinion)...
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