Hydrostatic Testing

The RIG team provides hydrostatic testing services that ensures the integrity of piping, pressure vessels, boilers, and HRSG’s is up-to ANSI code. We help ensure all your pressurized equipment is safe and meets local boiler/HRSG codes as-well-as B31.3 for chemical plants and B31.1 for power plants.

Our team of certified technicians can be on-site within 48 hours to provide equipment and perform expert hydrostatic testing. All hydrotests performed by our team include a hydro test tree with a certified gauge and relief valve to prevent over pressurization of the equipment, fill hoses, and high pressure hose. Depending on whether your specific application requires it, we can also provide a circulating pump and heat exchanger to heat the water on a boiler/HRSG to the required 70°F skin temperature.

800-770-4510   (Domestic)
+1 281-339-5751   (International)

First Quantum Minerals

Hydrotesting and chemical cleaning of the boilers, fuel oil piping and condensers. Hydrolazing on Steam, CCW, BFW and Condensate piping. Oil flushing of 2 SKODA STG’s. Impulse steam blows of 2 blocks of SKoDA STG’s.


Provided High Velocity Oil Flushing (HVOF) on Dresser Rand Recip compressors, and pressure testing and high pressure flushing of the Tiger West Rail Hydraulics


2 blocks Coal Fired Boilers- Chemical cleaning and pressure testing of the boilers. Hydrolazing on Steam, CCW, BFW and Condensate piping. Impulse steam blows.

Longview Power

New coal fired power plant – chemical cleaning of the boiler and pre-boiler piping systems, hydrotesting, and impulse steam blows

What is hydrostatic testing?

A hydrostatic test is a way in which pressure vessels such as pipelines, plumbing, gas cylinders, boilers and fuel tanks can be tested for strength and leaks. Hydrostatic testing is the most common method employed for testing pipes and pressure vessels.

What are the steps to performing a hydrostatic testing procedure?

The steps to hydrotesting are:

  1. Fill the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection
  2. Pressurize the vessel to appropriate test pressure (calculated by reliability services engineer)
  3. Test the pressure tightness by shutting off the supply valve and observing whether there is pressure loss
  4. Identify the location of a leak through visual inspection
  5. Measure strength by measuring permanent deformation of the container

Why should hydrotesting be performed on a regular basis?

Using this test helps maintain safety standards and durability of a vessel over time. Newly manufactured pieces are initially qualified using the hydrostatic test. They are then re-qualified at regular intervals using the proof pressure test which is also called the modified hydrostatic test. Testing of pressure vessels for transport and storage of gases is very important because such containers can explode if they fail under pressure.

What codes do pressure vessels have to meet?

Pressure Vessels, Boilers, and HRSGs,  Lines are tested to the accepted ANSI code depending on the plant they are in. This code is B31.3 for chemical plants and refineries, and B31.1 for power plants. For boilers and HRSGs, the test must conform to boiler codes applicable in the state where the boiler/HRSG is located.

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