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  1. mech9238

    Sprinkler NFPA 13 and Standpipe NFPA 14 Hydrostatic Testing

    Is the purpose of a Sprinkler and Standpipe test in NFPA13 and NFPA14 for: Structural integrity testing or leak testing? I was reading online and in the engineering forums here for ASME piping and hydrotesting (determining pressure amounts for test, etc) Is the 200psi for 2 hrs only for...
  2. mech9238

    HVAC Piping and Sprinkler Hydrostatic Testing (trapped air)

    Good Morning, Trapped air in a sprinkler or hvac (condesner, chilled water) system and hydrostatic testing. Hydrostatic test: min 200psi to max 450psi, Water with trapped air (cannot determine amount of air) Reading online, testing with air at 30psi is equivalent to a 150 water test. (the...
  3. mech9238

    Hot Water system, Pressure Gauge and Expansion Tank

    Hello, Expansion Tank Hot water system, starting at 70 degrees or domestic water temperature. Testing a radiant heating panel system. Start: 70 Temp, 40PSI Finish. 120 Temp Includes an expansion tank and pump. Pex piping. Will the system of a hot water system, which increases in pressure...
  4. mech9238

    Hydrostatic Pressure Testing with entrapped air and temperature

    I was told my numbers were wrong. The bulk modulus or coffecient of expansion was wrong. Not that this anaylsis is needed anymore, but here are the results. Air will expand as stated. Air compression and thermal expansion do not effect the above tests for my piping. Only pressure increases...
  5. mech9238

    Hydrostatic Pressure Testing with entrapped air and temperature

    Thank You for the responses. I tried to find industry standards for testing radiant heating panels. I could not find. Do you have any resources? https://www.achrnews.com/articles/98315-the-truth-about-testing-radiant-panel-heat-systems The article I read suggests ambient temperature would...
  6. mech9238

    Hydrostatic Pressure Testing with entrapped air and temperature

    Hello, I am new to this forum but have visited it several times. This might be a basic question but wanted to ask: My question is for performing hydrostatic testing for B31.9 Piping, Pex Piping, Radiant heating systems, and standpipe hydro tests. All testing would be anywhere between 15psi...
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