Is Hydraulic Fluid Flammable?

Is hydraulic fluid flammable? The answer may surprise you. Read on to learn more about the dangers of hydraulic fluid and how to keep yourself safe.

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Hydraulic fluid is a type of liquid that is used in hydraulic systems. It is made up of a variety of different chemicals, and its properties can vary depending on the specific formulation. Hydraulic fluid is used to transfer energy and power within hydraulic systems, and it typically plays a role in moving pistons, lifting heavy objects, and operating other machinery.

One key property of hydraulic fluid is its flammability. This can be a safety concern in some situations, such as when working with hydraulic tools or machines. However, not all hydraulic fluids are flammable, and the level of flammability can vary depending on the specific formulation. In general, the more volatile the chemicals in the hydraulic fluid, the more flammable it will be.

If you are working with hydraulic fluids, it is important to be aware of their flammability characteristics. You should also take precautions to stay safe, such as avoiding sparks or open flames near hydraulic equipment.

What is Hydraulic Fluid?

Hydraulic fluid is a term used to describe any fluid used in hydraulic machinery. The fluid is usually made up of a mixture of oils and water, and is used to transfer energy within the hydraulic system. Hydraulic fluid can be either flammable or non-flammable, depending on the ingredients used to make it.

The Flammability of Hydraulic Fluid

There is some debate about whether or not hydraulic fluid is flammable, but the consensus seems to be that it is. Hydraulic fluid is made up of a variety of different chemicals, and some of those chemicals are known to be flammable. In addition, hydraulic fluid can catch fire and spread quickly if it comes into contact with an ignition source.

The Risks of Hydraulic Fluid Fires

Hydraulic fluid is a type of liquid used in many industrial applications to transfer energy. Hydraulic fluids are usually made from petroleum products, and as a result, they are highly flammable. Hydraulic fluid fires can be very dangerous, and they can cause serious property damage.

There are many different types of hydraulic fluid, and each has its own flammability risks. The most dangerous hydraulic fluids are those that are highly refined and have a high percentage of hydraulic oil. These fluids are more likely to ignite when they come into contact with a heat source.

Hydraulic fluid fires can be very difficult to extinguish. Water will not extinguish a hydraulic fluid fire, and in fact, water can make the fire worse. The best way to extinguish a hydraulic fluid fire is to use a foam extinguisher or a dry chemical extinguisher.

If you are working with hydraulic fluids, it is important to be aware of the risks of hydraulic fluid fires. Be sure to keep your work area free of potential ignition sources, and always have an extinguisher within reach in case of an emergency.

How to Prevent Hydraulic Fluid Fires

Hydraulic fluid fires are one of the most serious and dangerous types of fires that can occur in an industrial setting. Because hydraulic fluid is highly flammable, a fire that starts in a hydraulic system can easily spread to other parts of the factory or warehouse, causing extensive damage and putting lives at risk.

There are a few things that you can do to prevent hydraulic fluid fires from occurring in your facility:

-Regularly inspect all hydraulic equipment for leaks, cracks, or other damage.
-Replace any hoses or other parts that show signs of wear and tear.
-Keep all hydraulic fluids clean and free of contaminants.
-Make sure that all workers who use hydraulic equipment are properly trained in its safe use and operation.

How to Extinguish a Hydraulic Fluid Fire

Hydraulic fluid is a petroleum-based or synthetic oil that helps power hydraulic systems. It is also flammable. A hydraulic fluid fire can be caused by a variety of factors, including operational errors, incorrect maintenance procedures, and faulty equipment.

If you have a hydraulic fluid fire, it is important to extinguish it quickly and safely. The best way to do this is to use a fire extinguisher designed for Class B fires, which are fires that involve flammable liquids like hydraulic fluid. Class B fire extinguishers use a chemical agent that breaks the chemical reaction that is creating the fire.

If you do not have a Class B fire extinguisher, you can use water to extinguish the fire. However, you should only use water if the fire is small and contained. If the fire is large or out of control, water will only make it worse.

The Aftermath of a Hydraulic Fluid Fire

Fires involving hydraulic fluid are not common, but when they do occur, the results can be devastating. Although hydraulic fluid is not highly flammable, it can easily catch fire and spread quickly, causing extensive damage.

Hydraulic fluid is used in a variety of applications, from construction equipment to automobiles. It is a clear, oily liquid that is under high pressure in hydraulic systems. When hydraulic fluid catches fire, it can burn rapidly, producing dense black smoke and potentially causing explosions.

If you are involved in a hydraulic fluid fire, it is important to evacuate the area immediately and call 911. Do not try to extinguish the fire yourself; it is best to let trained professionals handle it. Once the fire has been extinguished, you will need to assess the damage and take steps to prevent future fires.


It is our conclusion that hydraulic fluid is not flammable.


The U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) provides resources on hydraulic fluid, including information on its flammability. EERE also offers a online calculator that allows users to determine the energy content and emissions of various types of hydraulic fluid.


Dangerous goods experts get a lot of questions about whether or not hydraulic fluid is flammable. The answer, unfortunately, is not a simple yes or no. While most hydraulic fluids are not themselves flammable, they can easily become ignited by other sources of heat and flames.

This means that it’s important to take extra care when using and storing hydraulic fluids, and to always keep them away from potential ignition sources. If you have any further questions about the safety of hydraulic fluids, please contact a dangerous goods expert for more information.