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Recent content by leakyseal

  1. leakyseal

    tank shield design to contain pinhole leaks?

    Truth be told, what I'm looking for is a fabrication detail or code of practice (or external anecdotal evidence) for a splash wall built on standoffs from the tank wall. I can devise one but would prefer not to reinvent the wheel if possible.
  2. leakyseal

    tank shield design to contain pinhole leaks?

    I had been wondering if USEPA had something similar and was going to check this morning. This installation is actually in Newfoundland but we've been using the Ontario rules as a starting point...
  3. leakyseal

    tank shield design to contain pinhole leaks?

    IFRs: Ontario Ministry of Environment. Revised Chem Storage COP 2007 (or thereabouts, I don't have it in front of me).
  4. leakyseal

    tank shield design to contain pinhole leaks?

    To explain further motivation for the question, the relevant gov't agency standard says "The perpendicular distance between from the tank face to the top of the inside face of the containment shall be min. 1/2 the height above the top of the containment wall." We cannot provide this. Hence...
  5. leakyseal

    tank shield design to contain pinhole leaks?

    IFRs: yes, preliminary estimates indicate that this is the case. the tank is quite tall and relatively narrow for remote fabrication / road transport reasons.
  6. leakyseal

    tank shield design to contain pinhole leaks?

    Folks, I've poked around here quite a bit with no luck so hopefully the answer is not staring me in the face. We have a chemical storage tank inside a containment bund of sufficient volume to hold 150% of the tank's volume, as one may expect. The question has arisen, what if there is a...
  7. leakyseal

    Knowledge Center

    I used to keep notebooks and binders of articles as described, with inconsistent results. My latest method is to use Evernote (www.evernote.com) to keep my activity notes and c&p vendor info and articles on the fly (either directly from the web or from a locally open copy of something, or even...
  8. leakyseal

    simple (?) question regarding tank headspace vapour

    Hi Montemayor, Thank you for your reply. I don't blame you for having a hard time staying awake! You are correct that I did not give you the whole story. Tank is heated to 80 degC to facilitate dissolution of solids in the process vessel, via hot water dimple jacket. The tank vent is...
  9. leakyseal

    simple (?) question regarding tank headspace vapour

    Hi Folks, I am having a real Chem Eng 101 Brainfreeze. My embarrassment at having to ask this question, however, is outweighed by my desire to get things straight in my mind. I have an essentially pure solvent in a storage tank (relatively high boiling, benign solvent, smallish, in plant...
  10. leakyseal

    simultaneous dust and organic vapor control in mixing tank

    Hi, We are compounding glycols with surfactants and other powdered additives in a large agitated tank. Powder addition is generally brute force bag breaking over an open hatch. Glycol is heated to enhance dissolution of solids. There are thus two problems associated with the tank...
  11. leakyseal

    Canada TSSA, opinions wanted please

    The owner is ultimately on the hook for obtaining code-compliant equipment. They are right to ask, especially if they know an inspector is tramping around their plant on occasion. That said, clients will sometimes ask for stuff to be cert that doesn't need it. THAT said, unfortunately I can't...
  12. leakyseal

    sulfuric acid piping

    No-one has touched explicitly on the material issue. My experience, and more importantly my handy dandy Outokumpu Corrosion Guidebook (which can be had for free and I highly recommend obtaining) says 304 is an absolute non-starter for sulfuric in the full concentration range. There are a...
  13. leakyseal

    suction pressure losses in submersible pump?

    JRLAKE, I guess this is my question, is how does one define/calculate the pump entry losses? This is not a tabulated or calculable quantity with which I am familiar. BigInch, your point is a good one, but I believe I've managed to account for it already. The application is clean(-ish) ambient...
  14. leakyseal

    suction pressure losses in submersible pump?

    Dumb q. for the assembled cognoscenti: I'm working through the hydraulic modelling for my first wet well. Despite a reasonable amount of experience with pumping systems I haven't really worked with sub pumps before. Simple question on its face: Are there any suction friction losses to...
  15. leakyseal

    Solar Evaporation Ponds

    Metcalfe and Eddy, "Wastewater Engineering" has some design guidelines for evaporation ponds. Be warned that it's primarily a civvy book and takes a fairly lighthearted approach to mass transfer concepts. The method won't get you all the way there but we've used it for estimating in...
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