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Recent content by Atwerp

  1. Atwerp

    Mechanical or Civil or both

    I am not sure how that applies here. I don't think we fit into any of these catagories "manufacturing, mining, public utility, research and development, or other industrial corporation, or by employees of that corporation, provided that work is in connection with, or incidental to, the...
  2. Atwerp

    Mechanical or Civil or both

    I am writing to get clarification on the qualifications of professional mechanical engineers in California. Under the California Professional Engineers Act, Section 6731.6 and 6734.2 the duties of a mechanical engineer are defined in broad terms. I am looking for further clarification on a...
  3. Atwerp

    Corrosion

    "You need moisture and oxygen to create corrosion,you have both, to add more of one or the other will increase the rate of oxidation." This cannot be true. If you add more water you have less dissolved oxygen, therefore we are back to the original situation I described. Keep in mind, I in...
  4. Atwerp

    Corrosion

    Corrosionman is correct for a solution, however that is not what I am looking for. I do not own the tanks and the owner will not be adding cathodic or other protection. I am trying to find out if my activities will affect the existing rate of corrosion. Please Read the original question. i...
  5. Atwerp

    Corrosion

    It's not that simple. If that were the case, thae tank would corrode in air faster since there is more O2 available. Corrosion cells are set up because of the lack of oxygen in the water relative to the available O2 above the water line.
  6. Atwerp

    Corrosion

    I do not own the tanks or control what goes on with them. They are in the area of a groundwater clean up project I am working on. Anyone have an opinion on my question? Thanks
  7. Atwerp

    Corrosion

    I am looking for responses from engineers with expertise in corrosion. Here is the situation. I have a steel tank buried in the ground. The tank was originally installed with paint, but the paint is probably not intact currently. The tank is partially (1/2) exposed to groundwater and ½ above...
  8. Atwerp

    Invert elevation and Rim elevation

    Can anyone explain to me what the definition of Rim and invert elevations are on a sotrm drain drawing? Thanks, Atwerp
  9. Atwerp

    Diesel Leak rate through a buried pipe

    Kyong, what does rho represent?
  10. Atwerp

    Diesel Leak rate through a buried pipe

    That is why I am starting with trying to find the leak rate without considering that it is buried. Assume the worst case scenario would be the pipe leaking onto the surface.
  11. Atwerp

    Diesel Leak rate through a buried pipe

    No, not exactly. I will figure that out with geological magic. I am trying to figure out at what rate diesel could have leaked from the pipe. An opposing consultant made an estimate and I am trying to check if their calculation is at all accurate. Thanks
  12. Atwerp

    Diesel Leak rate through a buried pipe

    I need to calculate the rate diesel would leak out of a 2" steel pipe buried 3' below grade. The hole was approx. 1/4" diameter and the pipe is under 20 psi pressure. I know the soil type will probably affect the rate. If it is easier, can I find the maximum leak rate assuming the pipe were...

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