Hydrostatic Testing


Hydrostatic Test is one of the methods in which pressure vessels such as pipelines, gas cylinders and tanks can be tested for strength and leaks. This method involves filling the vessels with a liquid such as water or oil. The water may be dyed to aid in visual leak inspection. The location of the leak can be easily detected and identified if the water contains colorant and pressure dropping from the start test pressure.

Hydrostatic test involves in using several of pressure measuring instruments such as pressure gauge and pressure recorder. These measuring equipments need to be calibrated or verified in order to maintain the confidence in the test. Most of the industry’s need for hydrostatic test is to ensure the safety factor in processes that involve pressure vessels. Depending on the laws and regulations, newly manufactured pieces and in-use vessels are usually qualified by conducting hydrostatic tests as part of the verification. Strength can optionally be tested by measuring permanent deformation of the unit. Some of the regulation’s need is to do hydrostatic test with regular intervals. This is also important to maintain the safety of the system.

Water or oil are nearly incompressible and therefore are the most common liquid used for hydrostatic tests. Water is cheap, easily available and usually harmless to the system. The test pressure is usually higher than the operating pressure typically by 150% depending on the end user’s requirements. By using liquid as a test medium, only little work is required for a high test pressure due to the nearly incompressible factor. 

Generally, hydrostatic test requires pressure measuring devices such as pressure gauges and pressure recorders. Pressure gauges provide current readings for the pressure while pressure and temperature recorders record and monitor pressure behavior for a duration set by our end user or following reference standards. All of our measuring equipments will be calibrated for the purpose of the test.

Pumps are also an important part for hydrostatic test to provide various ranges of pressures according to testing requirements. Pumps will be used to inject and build up the pressure gradually safety reason. Reports will be issued after visual inspection based on requirements provided to state the fitness and strength of the UUTs. 

Here at Nusatek, we provide hydrostatic test services depending on customer’s requirements in terms of the laws and regulations that need to be followed and the location that tests need to be commenced. Our capabilities for hydrostatic testing currently can reach up to 38,000 psig. 


Our Hydrostatic Testing Capabilities:

  • Autoclave Vessel
  • Boilers
  • Cylinders
  • Dampener
  • Fire Extinguisher
  • Fittings
  • Heat Exchanger
  • Pipe Spools
  • Pressure Hoses
  • Pressure Vessel
  • Strainers
  • Valves
  • Water/Oil Tanks