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Recent content by UtilityLouie

  1. UtilityLouie

    Fire dampers in wood floor joist?

    This is a big "it depends" answer. You first need to make sure the whole floor assembly is a rated assembly. If it is without upgrades, you should be able to install the fire dampers in the floor if that specific fire damper has been rated by UL to be installed horizontally in a UL rated floor...
  2. UtilityLouie

    Best Ductwork Material for Moisture Removal Process

    If you are continuously exhausting hot humid air, freezing shouldn't be a huge concern. Use SS duct. Drain the heck out of your duct. The drains that are outside will need to be insulated and heat traced because they'll be P-trapped, right? I think that insulation would be a cost to make...
  3. UtilityLouie

    Design pressure for Blowoff Flash Tank

    Suggestions: - Calculate the flash steam amount in the worst case - Calculate the back pressure on the tank when that worst case flow is going through the vent to atmosphere. - Determine what you tank design temperature is. You'll have high pressure blow down condensate, there will some of that...
  4. UtilityLouie

    Goal Setting

    I'll tell you what... I've been doing project work for 20 years and every year it's the same: ***Email from manager*** "It's goal setting time! Set your goals for the next year please and make sure they are S.M.A.R.T. (Specific, Measurable, Attainable, Realistic, Timely)" ***/end email***...
  5. UtilityLouie

    air properties over 400F

    I have an old book: Industrial Research Service's Psychrometric Tables and Charts by Zimmerman and Lavine Second Edition This has high temp air tables and charts. Something else that also works is an excel add-in called "@air". It is found on at: http://www.techwareeng.com/prodAA.htm It...
  6. UtilityLouie

    Steam Safety Valve Sizing

    I think that TBP has the right approach... Find where the reliefs are set on the system at the upstream of the PRV. This is your worst case inlet pressure to the PRV. Talk to the valve manufacturer and get the max choked flow through that valve at the worst case inlet pressure. This is the...
  7. UtilityLouie

    B31.1 sustained stress in Autopipe.

    I've worked with Caesar II, Triflex and AutoPIPE. One of the things that I was mentored on from the start was to always consider the corroded thickness. So depending on what program I've used I make sure that all analysis is on the corroded thickness. This is the most conservative path and...
  8. UtilityLouie

    Rail Car Pressure Ratings & Tanker Truck Pressure Ratings

    Hello All, Because I handle boiler and other ASME issues, I was asked a question today about air unloading chemicals from rail cars and tanker trucks. They asked: "Why aren't those vessels ASME stamped if they operate at 45 psig?" I'm continuing to investigate, but hoped that someone here has...
  9. UtilityLouie

    How do I stay motivated???

    Thanks for the suggestions... I think that one of the issues is the large amount of "procedures" that have recently been initiated. Considering the company I work for has a philosophy for streamlining process: this process has been fully backed by upper management. I would guess these new...
  10. UtilityLouie

    How do I stay motivated???

    Considering I'm a "blood sucking overhead" corporate engineer... and it seems like the capital spigot has been squeezed back... I'm not sure if it's a temporary slow down or a new corporate philosophy.
  11. UtilityLouie

    Damper Leakage Calculation

    Another suggestion is to look at damper manufacturers like Ruskin or Greenheck. In their submittal data they have a leakage rate @ differential pressure chart. Even if your damper isn't one of these manufacturers, you can pick a model that's similar. It should get you in the ballpark. One...
  12. UtilityLouie

    How do I stay motivated???

    All I've been doing for the last couple of months has been project proposals and RFQ packages. I know, I know, "be happy I have a job", BUT I need some way to make this work more interesting until I get some of this stuff approved! It seems like it's all just clerical work!
  13. UtilityLouie

    PRV Vent Pipe Termination Above roof???

    I think the most straightforward answer is the termination point needs to be where it cannot do harm when a release occurs. In my opinion, that would mean a straight up discharge would need to be terminated 8' above the roof.
  14. UtilityLouie

    Stainless Refrigeration Piping/Specialties

    What about using SS instrument tubing? Does anyone have recommendations on specs to use? I'll just say this: I've checked ASHRAE for recommendations, I've checked my Piping Handbook for recommendations and... nothing... I know I can "create" something, but I'd sure like to design something...
  15. UtilityLouie

    Stainless Refrigeration Piping/Specialties

    I'm working in a relatively corrosive atmosphere and I have used coated copper tubing with some success in these environements. I would sure like to have an option to use SS tubing or piping and use SS refrigerant specialties. Any ideas? Manufacturers?
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