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  1. DerekLJ

    When are expansion joints in the suction required?

    Our client is asking us to put expansion joints on the suction of all pumps in the thermal power plant that we are designing and building. pneumatic, centrifigal, everything. What defines the need of expansion joints in these pumps? I imagine anywhere where there is heat or vibration, but at...
  2. DerekLJ

    Codes or Norms governing double walled underground pipe

    The owner is an american company. Regardless, we always try to fulfil american standards in order to guarantee the work quality, even thought they may not "officialy" apply
  3. DerekLJ

    Codes or Norms governing double walled underground pipe

    Thats exactly what i'm referring to. Is there a standard or code that demands this type of piping in underground piping systems?
  4. DerekLJ

    Codes or Norms governing double walled underground pipe

    No,i'm not talking about thickness. Double walled pipe can be any thickness. I'm talking about pipe with two walls, meaning an interior pipe inside of an exterior pipe. One inside the other. After re-reading this post, i noticed that it may seem slightly sarcastic or harsh. That isn't the...
  5. DerekLJ

    Codes or Norms governing double walled underground pipe

    Hi everybody, We are building a thermal powerplant in Peru, where many oily-water drainage system is underground. It has been suggested to us that all these tubes be double walled because they are always double walled in power plants in the US. I understand that this is good engineering...
  6. DerekLJ

    codes and standards for steam and water analyzing system

    Thnx JKseagull, that will come in useful. Any others have input?
  7. DerekLJ

    codes and standards for steam and water analyzing system

    Sorry, i'm not familiar with them, where would i start looking,who is the issuing body?
  8. DerekLJ

    codes and standards for steam and water analyzing system

    thanks, any others?
  9. DerekLJ

    codes and standards for steam and water analyzing system

    Hi all, I am writing a specification for a "Steam and Water Analyzing System (SWAS)" and want to know what are the codes and standards that govern the construction and testing of a steam and water analyzing system (SWAS)?
  10. DerekLJ

    defining the minimum design metal temperature

    How do you define the MDMT (minimum design metal temperature)? What ambient temperture do you need to be able to define it?absolute minimum? average minimum? If i have an absolute minimum of 3.9ºF (-15.6ºC), what would the MDMT. please help me here, i'm dying with this mess!
  11. DerekLJ

    internal coating of a dry air reciever

    Thank you all for your quality answers! stars for everyone!!!
  12. DerekLJ

    internal coating of a dry air reciever

    Does a carbon steel dry air receiver for instrumentation air, require internal coating?
  13. DerekLJ

    Defining Design Wet Bulb Temperature

    Thanks everyone. The location of the plant is in a remote area of argentina, near the end of the world. The basis of my question was if i should absolute tempertures and humidity to define the WTB or not. When i did the calculation, the absolute DBT, gave me a WBT that was far beyond what is...
  14. DerekLJ

    Defining Design Wet Bulb Temperature

    Thanks MintJulep. What does one do when they don't have the standard or those specific tables. I know i don't. Is there a accepted practice for calculating (in the office... wrapping the sock around the bulb doesn't count) Maybe what i'm getting at is what values does one use in the...
  15. DerekLJ

    Defining Design Wet Bulb Temperature

    I know this seems to be a very easy question, but if i knew the answer, i wouldn't be asking, please forgive me for being so naive. I understand that WBT is so critical in cooling processes, that we have begun to question how we define the DESIGN WBT. WBT is not difficult to design, but what...
  16. DerekLJ

    reference price for water bath indirect heater

    I'm looking for quick reference price for a water bath indirect heater. I just need a quick ballpark price for a standard design. Design data is as follows: Design Pressure: 1040 PSIG Operation Pressure: 878 PSIG Design Temperature: 127 oF Operation Temperature: 77 oF Fluid: Fuel gas 0.6...
  17. DerekLJ

    Air Dryer heat release

    I'm not sure if this is the right forum to place my question, but there is a connection, you'll see. Really, i don't know a whole lot about air dryers, but i do know is that they release heat while they are working. I want to know how to calculate that heat, or where i can get a referencial...
  18. DerekLJ

    reaction time for stand by gas compressor

    Thank you gepman... For the sake of learning, are there any other opinions? maybe any experts in natural gas compression?
  19. DerekLJ

    reaction time for stand by gas compressor

    Sorry, i want to control the discharge pressure
  20. DerekLJ

    reaction time for stand by gas compressor

    very good points. I forgot to put that it is screw type natural gas compressor with capacity of 4800 lbs/hr. It has 507 psi suction pressure and a 940 psi discharge @ 80F Regarding my deffinition of immediately, i would say, 1 ms. I know that 1ms is completly unrealistic, so i'm looking for a...

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