A rise in temperature of the pipe wall and test liquid causes circumferential expansion of the pipe wall and also an increase in volume of the test liquid. The combined effect of these expansions has the same effect as pumping additional water into the test section and will cause an increase in pressure.

Water Jacket – This type of hydrostatic testing involves filling a small pressure vessel with water, placing it inside a water-filled test chamber (called a test jacket). The vessel is then pressurized, measuring the volume of water displaced from the test jacket by the vessel’s expansion.

To start the test, inspectors must first make sure all lines are filled with water and any air is removed. Opening the inspector’s test valve – or another valve on the end opposite the water input – will allow air to escape. Connect the test hose to the system, and then to the hydrostatic test pump.

Pump trouble is usually characterized by increased noise, increased heat, erratic operation of cylinders, difficulty or inability to develop full output, decreased speed of cylinders or hydraulic motors, or failure of the system to work at all.

Troubleshooting Hydrostatic Drives Null the valve if possible. If the system is overheating, check the oil level in the tank, inspect the heat exchanger, check the inline pressure filters, inspect the crossport relief valves, and check the pump and motor case drains for excessive bypassing.

Duration of the test is two hours. Special consideration must also be given when multiple piping products are used.”

The cost of hydrostatic testing usually depends on the extent of the plumbing system being inspected. Most hydrostatic tests cost between $250 to $500. Bigger plumbing systems can cost thousands of dollars to be inspected.

Duration of the test is two hours. Special consideration must also be given when multiple piping products are used.”.

A pumping test is a field experiment in which a well is pumped at a controlled rate and water-level response ( drawdown) is measured in one or more surrounding observation wells and optionally in the pumped well (control well) itself; response data from pumping tests are used to estimate the hydraulic properties…

Hydrostatic testing is a process used for testing tanks and pipes for leaks. A hydrostatic test is performed by filling (pressurizing) the vessel or piping being examined and subsequently monitoring the level of pressurization for changes. If there is a lowering of pressure, there is a leak somewhere in the system.

Hydraulic Institute (HI) Definition. What is the Hydraulic Institute? The Hydraulic Institute is an association of pump industry manufacturers in North America that develops and publishes the most frequently cited pump standards for the water and wastewater applications.