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  • Users: yene
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  1. yene

    Code Compliance for relieving diesel / fish oil vapor

    Right, but ASME VIII applies to construction of vessels. I'm concerned with sizing a vent header / rupture disk system based on the required relieving flow in a fire scenario.
  2. yene

    Code Compliance for relieving diesel / fish oil vapor

    Thanks everyone. So the theme seems to be that API RP 521 can be applied. This is quite the discovery as my understanding was always that any flammable/combustible liquid must have its required relieving flow calculated using the NFPA 30 formulas. Is this really not the case? Operating in...
  3. yene

    Code Compliance for relieving diesel / fish oil vapor

    Hi all, I'm reviewing a past relief analysis where ~15 vessels relieve to a common header. Contents of 4-5 vessels are fish oil but we are able to assume diesel oil for modelling purposes. Long story short: the worst-case scenario was assumed to be an external fire scenario, however I'm...
  4. yene

    pH Neutralization of Aqueous Waste

    Thanks, I like that idea a lot. If I can't figure out the math then we might have to go that route. The rest of the system is fully automated, though, so we are going to try hard to automate this if it's possible. I should also note that, while infrequent, the neutralization process will...
  5. yene

    pH Neutralization of Aqueous Waste

    @SuperSalad I don't have exact numbers or ranges, however I was told that in most cases, the water will not need any neutralizing. This acid/caustic injection system is anticipated to be necessary only some of the time. And when it is necessary, it will probably be a very minor pH adjustment...
  6. yene

    pH Neutralization of Aqueous Waste

    Interesting, thanks. I fear that the empirical approach might not work for our application though since we are dealing with roughly 10,000L of water max. It sounds like overshoot might be an issue, given that the pH of the initial solution is not expected to be too far from neutral.
  7. yene

    pH Neutralization of Aqueous Waste

    @crshears Neutralizing by batch.
  8. yene

    pH Neutralization of Aqueous Waste

    @moltenmetal The water coming in is not absolutely pure but it is expected to be relatively neutral every time (i.e. these acid/caustic injections will not be necessary at all for the vast majority of batches). So do you think we need to go with the more crude approach of just pumping in acid or...
  9. yene

    pH Neutralization of Aqueous Waste

    Hi all, I'm working on an aqueous waste neutralization/discharge system. I have a certain volume of aqueous waste per batch (say 1000 L). We have pH sensors and transmitters. And we need the pH of the aqueous waste to be within an acceptable range before being discharged into the city drain...
  10. yene

    Static accumulation of conductive fluid in non-conductive pipe

    I have those properties Conductivity = 6000000 pS/m Fluid velocity is 1 m/s through 1.75 inch pipe. Fluid temperature should be about room temp. Another thing I should mention is that the acetone is mixed and agitated in a glass-lined tank for some time right before it gets sent through this...
  11. yene

    Static accumulation of conductive fluid in non-conductive pipe

    Thanks for the reply. I just read through the thread and while it is informative, it doesn't quite answer my question from a quantitative perspective. I'm trying to determine whether I even need to take any measures to avoid a static ignition hazard. Additionally I am not sure to what extent...
  12. yene

    Static accumulation of conductive fluid in non-conductive pipe

    I am asking this on here because I cannot find a conclusive answer anywhere. I have acetone flowing for ~100 feet from a glass-lined vessel to a steel grounded vessel. The pipe is 2" diameter and lined with polypropylene, thus making it non-conductive. My understanding is that acetone, despite...

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