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Our Customers Say:

“I wanted to take the time to personally thank you for the time and effort that LTI has put into the testing involved with our orders. Your staff has been invaluable over the last several years.  Additionally, the fact that you are now able to perform Fracture Toughness testing in house has already proven priceless in both the turnaround time and in getting my questions answered. I’ve been fortunate to have worked with LTI since 1986 and I have come to think of LTI as an extension of Dubose. I look forward to our continued relationship.”

Dave Stepp,
Quality Assurance Manager

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Hydrostatic Pressure Testing

Can it Take the Pressure?

Hydrostatic pressure testing

Hydrostatic Pressure Testing provides a method for finding leaks or verifying performance and durability in pressure vessels such as pipe, tubing, and coils. The hydrostatic pressure test is classified as a nondestructive test, which means the sample is typically not harmed during testing. During this particular leak test, a sample that does not meet performance or durability specifications may fail and become unusable.

The Hydrostatic Pressure Test Process

Standard hydrostatic pressure testing procedures entail filling the test vessel with liquid, bleeding out air and then pressurizing the piece. Our technicians thoroughly examine the vessel for leaks or permanent changes in shape. The test is performed with a nearly incompressible (compressible only by weight, not air pressure) liquid, usually water or oil, because it will only expand by a very small amount should the test piece fail and not pose a danger to the technician. The hydrostatic pressure test can also be performed with pressurized air, but this leak test is generally carried out with the vessel under water for safety reasons. LTI is equipped to provide hydrostatic pressure testing using water, oil, or air under water. Water is our most commonly used test medium because it is less expensive than oil, an easier method to set up than air, and is the least costly of the three.

Hydrostatic pressure test

The pressure used in hydrostatic pressure testing is always considerably more than the operating pressure to give the customer a margin for safety. Typically the test is performed at 150 percent of the design or working pressure. For example, if a pipe was rated to a working pressure of 2000 PSI, it would be tested at 3000 PSI. Our technicians can test tubing, pipe and coils to pressures up to 10,000 PSI in many cases.

LTI Capabilities

  • Products Tested – tubing, pipe, coils
  • Testing Medium – water, oil, air (under water)
  • Pressures to 10,000 PSI

Test Methods/Specifications

  • ASME SA530
  • ASME SA999
  • ASME SA1016
  • MIL-T-16420K

News & Articles

Can it Take the Pressure?