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  1. shup0739

    Flow rate of N2 with know pressure

    Cool... I will refine my calculations with the input you all have contributed. By the way, I want to than you all, its really great to have technical support such as this. Thank you all once again, and I will definately have to get my hands on a copy of Shapiro's...sounds like a useful...
  2. shup0739

    Flow rate of N2 with know pressure

    The average temperature in the line is probably around 160 deg C. It rises to about 190 deg C. Because of the tracing and insulation, there seems to be minimum heat loss from the pipe to atmosphere. The line when operating maintains 160-190 deg C. The nitrogen on the other hand is about...
  3. shup0739

    Flow rate of N2 with know pressure

    I went back through Crane T410 as sugested and found a neat sample problem to the one I am after. My pipe is schd. 40, insulated and steam traced pipe with a nitrogen source off our main header (unlimited supply)...40 PSI Nitrogen flows through the 24 meter long line to keep the line open and...
  4. shup0739

    Flow rate of N2 with know pressure

    Yes...sorry the unclarification earlier. high pressure 40 PSI is fed into a 1 " line 28 meters (78 ft) long that runs into a neutralizing column which is at atmoshperic. Well, I think its safe to assume its at atmospheric...the vessel is designed for 15-2 psig but there is a drain line which...
  5. shup0739

    Flow rate of N2 with know pressure

    I am trying to figure out the flow rate of nitrogen through a 1" line. I have a high pressure (40 lb) nitrogen flowing in a 1" line. Can anyone direct me in finding charts that would correlate pressure of a certain line size with expected N2 flow rate. Or perhaps guidance into pressure and...
  6. shup0739

    Proper way of sizing a steam Trap

    Hello All, I am trying to size a steam trap for a main steam header. I have a 165 psig steam header and would like to put a trap at the low point. I've done some calculations and my load comes out to less than 1/2 lb/hr. I'm not sure if that really makes sense, I was anticapating more but I...
  7. shup0739

    Density of Air vs. Pressure

    Cool...thank you all for your help. I have found that crane tech paper 410 is the best and most easiest resource. sam
  8. shup0739

    Density of Air vs. Pressure

    Hello all, It seems like Air data is a bit difficult to get a grab of. While I have been able to find a great deal of information on the change in desity due to changes in temperature I have been unsuccessfull in finding data on the Pressure vs. Density of Air. can anyone suggest a reliable...
  9. shup0739

    Pressure Drop and Friction Factor in Flow of Gases

    I appologize if I have been unprofessional, believe me that is not what I intended to do...I just got really frustrated after searching for a way to solve this problem and at times I found contradicting ways of doing this problem and I just wanted to get someones real time opinion and I guess...
  10. shup0739

    Pressure drop across a valve with air going thru ! Help ME!!

    Thank you I think that helped a lot. I actually have cranes 410 but I was not able to find your pressure drop formula that you have sugested I ened up using another formula that correlates the head loss to pressure drop which is simple multiplying your head loss by the density and gravity...
  11. shup0739

    Pressure Drop and Friction Factor in Flow of Gases

    I have already tried to solve this but I am getting a pressure drop of zero and I know that does not make sense here. I know how to do this in the case of a fluid but with gases its a little bit different. I am familiar with the choked flow where the (Pin >=2*Pout) then Cv= Q...
  12. shup0739

    Pressure drop across a valve with air going thru ! Help ME!!

    Ok I am really stuck here and I need your help! here is the information I have so far : I am pulling facuum on a vessle using a jet, and I know the pressure at the jet and the pressure at the vessle. I have a valve mid-way and I need to know the pressure going into this valve and the pressure...
  13. shup0739

    Pressure Drop and Friction Factor in Flow of Gases

    Ok I am really stuck here and I need your help! here is the information I have so far : I am pulling facuum on a vessle using a jet, and I know the pressure at the jet and the pressure at the vessle. I have a valve mid-way and I need to know the pressure going into this valve and the pressure...
  14. shup0739

    How do I calculate impeller size?

    Currently I have a pump with an 11" impeller at a discharge pres of 22psi and 112GPM. I'd like to know how much will the flow and/or pressure will change if I trim or increase my impeller size. is there a formula for this ? thank u
  15. shup0739

    Why is it important to remain around 5 ft/s flow?

    Thank you to everyone that replied to my post. Yes the system is being designed to last for years if possible. The chemistry of the water is an interesting point. I don't really have much experience with piping design, i'm actually a young ME out of MSU so the rule of thum isn't too...
  16. shup0739

    Calculating flow through branch piping

    Thank you all for your replies. You have really helped me tremendously. Yes I am confusing flow with head loss. I appologize for that. Moreover, it makes sense that the amound of water that I begin with must not decrease because of the conservation laws. If I have 112 GPM on the main...
  17. shup0739

    Why is it important to remain around 5 ft/s flow?

    Well i'm basically pumping water from a tank to a vessel through branch piping and I have it going into 8 different nozzles. There is no solid particles. errosion i guess isn't a factor if i'm using schd 40 stl piping. But wouldn't it have an effect on the vessel as it discharges through...
  18. shup0739

    Calculating flow through branch piping

    Yes I understand how to figure out the head loss calculations but How do I then find the flow of water in the pipe downstream. The piping down stream is identical in size and orientation and therefore I would assume that the flow at the T-connection would be equal since the piping scheme...
  19. shup0739

    Why is it important to remain around 5 ft/s flow?

    For flowing water in steep piping...why is it important to keep the flow at or below 5 ft/s? Is it this a critical verlocity in which errosion begins?
  20. shup0739

    Calculating flow through branch piping

    I have a 2" shd 40 pipe running horizontal for about 2 ft and then takes a 90 deg turn and heads for about 2 ft where it breaks into a T-Connection and goes left and right. My question, if I konw what the flow at the start which is 112 how do I figure my flow at the T-connection to the...

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