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      • ASME Code Welding
      • Aluminum Welding
      • Brazing and Soldering
      • Precision Welding Services
    • Assembly / Testing Services >
      • Helium Leak Testing
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      • Hydrostatic Pressure Testing
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      • Cold Shock Testing
      • Precision Cleaning
      • Dye Penetrant Testing
  • Products
    • Vacuum Products >
      • Custom Vacuum Chamber >
        • Custom Aluminum Vacuum Chamber
        • Custom Stainless Steel Vacuum Chamber
        • Custom Exotic Material Vacuum Chamber
      • Custom Combination Pressure and Vacuum Chamber
    • Pressure Products >
      • Custom ASME Code Pressure Vessel
      • Non ASME Code Pressure Vessels
      • Custom ASME B31.3 Piping Systems
    • Cryogenic Products >
      • Custom Cryostats / Dewars >
        • Custom Aluminum Cryostats / Dewars
        • Custom Stainless Steel Cryostats / Dewars
      • Custom Cryogenic Distribution Boxes / Cold Boxes
      • Custom Heat Exchangers
      • Custom Cryogenic Thermal Shrouds and Shields
    • Machined Products >
      • Precision Mechanical / Electrical Assemblies
      • Custom Precision Machined Parts
      • Radio Frequency Components
    • MLI - Multi Layer Insulation
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Call: 708-425-9080

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Hydrostatic Pressure Testing

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Hydrostatic pressure testing of an industrial  process chamber
Hydrostatic pressure testing is performed by sealing off a pressure vessel except for a single entry port.  Deionized water is poured into the chamber until it is full of water.  The chamber is oriented in such a way to eliminate the presence of trapped air inside the vessel.  A hydraulic pump cart is then attached to the vessel in order to bring it up to a pre-determined test pressure.  The pressure is held for a predetermined amount of time to ensure that there are no leaks around the welds or ports on the vessel.  

The hydraulic pressure test is inherently safer than an pneumatic test in that a failure on a hydro-static test would mean a few drips on the floor.  A failure on a pneumatic test could result in a catastrophic explosion.  There are some instances where a pneumatic test is preferred or required in that exposure to the hydraulic fluid could pose issues to the quality requirements of the chamber.

The minimum required test pressure for a hydro-static test is:

Minimum Pneumatic Test Pressure = 1.3 x MAWP x LSR
- MAWP = Maximum Allowable Working Pressure
- LSR = Smallest ratio of the allowable stress at test temperature to the allowable stress at the design temperature of the materials used in the vessel construction.

Once the hydro-static test is complete the vessel is drained and disassembled so that it can be thoroughly cleaned.  The vessel is then reassembled and packaged for shipment.

Custom Carbon Steel
Process Vessel Hydro-Static Pressure Testing

Filling a custom pressure vessel with de-ionized water in preparation for hydro-static test.

Custom Hastelloy
Process Chamber Hydro-Static Pressure Testing

Hydro-static pressure testing of a Hastelloy pressure chamber.

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Phone: 708-425-9080
Fax: 708-425-2612
Address: 4601 W. Southwest Highway, Oak Lawn, IL, 60453
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