HYDROSTATIC TESTING

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HYDROSTATIC TESTING
Approved for Public Release
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Hydrostatic Testing

• Testing requirements may be specified in
  drawings, specifications, or standard clauses (76
  series)
• Generally procedures are required
• must be clear, concise, and sufficiently
  descriptive to perform the test
• may require approval of the test procedure (VPAR)

Approved for Public Release
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Hydrostatic Test Setup System

• Use of Test Gauges
• Must be in the calibration system and properly
  calibrated
• Must be of a proper range for its intended use
• Anticipated test pressure reading must be
  approximately 1/2 to 2/3 of the total gauge
  range.
• Good practice is gauge increments must be no
  greater than the total tolerance allowance.

Approved for Public Release
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Hydrostatic Test Setup System

• Cleanliness of the Test System and Fluid
• Contamination within the test setup may
• influence the outcome of the test,
• damage component being tested, or
• damage test setup equipment
• Example dirt on a valve seat
• Cleanliness of the Tested Product
• Requirement may invoke specific cleanliness for
  the test setup and fluid
• Requirement may have specific flushing
  instructions for the product prior to and
  following the test

Approved for Public Release
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Test Setup Must be Designed for Safety and
Functionality

• Relief valves must be incorporated into the test
  system to prevent over pressurization
• Protect against personnel injury
• Prevent damage to test hardware
• Prevent damage to component being tested

Approved for Public Release
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Test Pressure, Temperature and Dwell Time

• Allow time for the system to stabilize at ambient
  temperature before conducting the test.
• Pressure, temperature, and dwell time must have
  tolerance limits - if not available, request
  limits using a Vendor Information Request (VIR).
• Tolerance per industry standard is not acceptable

Approved for Public Release
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Hydrostatic Test Setup System

• Pressurize the system and isolate the test
  product from balance of the test setup
• Observe the test product for results as required
  in the appropriate procedure and document the
  results
• Obtain Electric Boat witness if required (SC37-8)
• Inspect for leakage through the product
• Document the actual time, temperature, and
  pressure test parameters

Approved for Public Release
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Condition of the Component After Testing

• Properly cleaned
• Preservatives, if required
• Sealed, if required
• Proper orientation during handling and storage to
  prevent damage
• (example position of ball or gate within a
  valve may be important, especially for long term
  storage)

Approved for Public Release
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Test Report Must Contain

• Name of Testing Organization
• Date of the test
• EB Purchase Order and Item Number
• Applicable Component Specification, Drawing, etc.
  and Revision
• Test Procedure and Revision (VPAR if applicable)
• Identification of testing equipment
• Serial number of gauging used
• Traceability of component (Serial/Heat/Lot Code
  Number)

Approved for Public Release
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Test Report Must Contain (continued)

• Actual test parameters (pressure, temperature,
  dwell time, etc.) and the acceptance criteria
• Statement of results (Accept or Reject)
• Document nonconformance should failure occur
• Component(s) affected
• Amount and rate of leakage if recordable,
• Signature of test organization representative and
  date as required by the specification

Approved for Public Release