Hydrostatic Pressure Testing Equipment

What Is Hydrostatic Testing?

Hydrostatic testing, or a hydrotest, is the process of testing piping systems, pressure vessels, gas cylinders, fuel tanks, and boilers for leaks. The test involves filling the system with a test liquid, usually water, and raising the pressure to a desired level. Test operators then monitor the system for measurable or visible leaks during the specified test period.

Hydrotesting is an important process that helps analyze a pressurized system’s integrity. It plays a critical role in identifying faulty equipment and preventing potentially dangerous consequences for people and infrastructure in the surrounding environment. Learn more about hydrostatic testing, key considerations, and the hydrotesting equipment we offer at MAXPRO® Technologies.

When Is Hydrostatic Pressure Testing Required?

Hydrostatic pressure testing is a mandatory requirement to ensure compliance with the ASME B31 Pressure Piping Code and Department of Transportation (DOT) standards. Compliance with these regulations helps to ensure worker safety and avoid legal sanctions and liabilities.

Below is an overview of regulatory timelines for hydrostatic pressure testing for different systems.

Fire Extinguisher Systems

For dry chemical fire extinguishers, hydrostatic pressure testing should be done every 12 years. Carbon dioxide, pressurized water, and wet chemical fire extinguishers require more frequent testing—every five years.

Piping Systems

For pipeline systems, federal regulations require a hydrostatic test before any operation commences. Routine water pressure testing may be conducted once per year, or more frequently if leaks are suspected.

High-Pressure Cylinders

The DOT requires hydrostatic testing for cylinders every three, five, or 10 years depending on age, material type, cylinder content, and any special permits from the manufacturer.

Boilers and Heat Exchangers

Hydrostatic pressure testing for boilers and heat exchange units involves filling the system with water and pressurizing it to one and a half times the MAWP for a short period of time. If there are any leaks, the boiler cannot be used for routine use. This test ensures that the system can tolerate the high pressures and temperatures required during operation.

Considerations for Your Hydrostatic Pressure Testing Application

The following are important things to consider when selecting hydrostatic test equipment.


Hydrostatic testing involves two types of pressure: initial pressure and testing pressure. The initial pressure is the pressure after the test specimen is prefilled. The testing pressure is the required pressure the specimen is raised to for testing.

Testing Frequency

Your choice of hydrostatic test equipment should be able to handle the frequency of tests required, whether it’s daily, weekly, monthly, or yearly.

Flow Rate Required or Volume of the Specimen to Be Tested

You’ll need to know the flow rate required for the test or the volume of the specimen that requires testing. This will allow you to select properly sized testing equipment.


It’s also important to know how much time is available for the test to reach the desired pressure. Economic option: A smaller pump can be specified if time to pressurize is not critical.

Driver Type

Also decide on the type of driver preferred, such as engine, electric motor, power take-off or pneumatic.

Our Hydrostatic Pressure Testing Equipment

At MAXPRO® Technologies, we provide the following high-quality hydrostatic pressure testing equipment.

  • MAXPRO® PowerCube: Designed for on-the-spot, accurate hydrostatic testing, the MAXPRO® PowerCube features large dual pumps, high flow, and an intuitive control panel, all in a compact stainless steel design.
  • MAXPRO® Two-Wheeled Test Carts: Portable test carts are crucial for oilfield environments. We offer multiple test cart arrangements depending on your testing needs and applications.
  • MAXPRO® Hydrostatic Power Packs: With a lightweight, portable, and self-contained design, our power packs are cost-effective hydraulic power options suitable for elevating pressures in water, oil or even chemical mixes.
  • MAXPRO® Pump Skid Systems: We provide compact and complete pump skid systems for water or oil service, with pressure capacities between 500 and 60,000 psi.
  • MAXPRO® Test Benches: We also provide test benches for water, air, gas, and oil service. Options include vertical or horizontal test chambers and manual, semi-automated, or PLC controls. In addition to hydrostatic testing, our test benches can be used for leak testing and burst testing.
  • MAXPRO® High-Pressure Air-Driven Liquid Pumps: Our high-pressure data logger simplifies test data recording from MAXPRO® Liquid Pump systems.

Let MAXPRO® Handle Your Hydrostatic Testing Equipment Needs

It’s important to select the right hydrostatic testing equipment for safe, efficient, accurate, and regulatory-compliant leak detection service. Contact MAXPRO® Technologies for high-quality hydrostatic pressure testing equipment for your needs. We specialize in engineer-to-order package systems, custom-designed and built to meet your hydrostatic test requirements.