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What is Burst Pressure?

Mary McMahon
Updated May 17, 2024
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Burst pressure is sometimes defined as the point at which something such as a valve or hose will fail as a result of pressure, and it may also be defined as the point right before failure will occur. In either case, this pressure could be considered an expression of the maximum pressure which something can endure before it will break. It is important to consider burst pressure when designing any sort of system which is used with pressured materials such as water, gas, and various fluids, whether that system is the radiator in a car or a municipal water system.

A number of factors can influence this pressure. Knowing the parameters, an engineer can calculate burst pressure and work backward to determine which kinds of components could be used. Obviously, one major factor is the material being used to make a valve, pipe, or holding chamber. The quality of the material and its thickness can determine how much pressure it will withstand. Another factor is maintenance; a brand new valve is less likely to fail than an old valve, and a well maintained valve is less likely to break than one which has been neglected.

Factors in the environment can also be involved. High heat may lower burst pressure by weakening the material, and the composition of materials being carried in a pipe can also be important. A garden hose, for example, may be more likely to burst if the water is mildly corrosive, because it can eat away at the hose. Likewise, piping which is subjected to sun, scouring winds, and the elements will break down more quickly than safely sealed piping. Conditions such as extreme cold can also be a factor in burst pressure.

A burst pressure test can be conducted as part of materials testing to see what kind of conditions a component can withstand. During this type of test, the pressure is gradually increased to see when the component will burst. Taking this into account, the product developers can determine whether or not the device is appropriate for the intended use. It is important to make sure that components exceed the potential pressure of the system so that in the event of a pressure spike, the components will hold.

Having components such as hoses and valves fail can be very dangerous. A burst at high pressure may create tiny projectiles which could injure people who happen to be in the way. The unexpected release of pressurized materials can also pose a safety threat.

AboutMechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a AboutMechanics researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments

By David09 — On Nov 07, 2011

@NathanG - Yeah, I always make it a point to let my water faucets drip during the cold winter months. Temperature does affect burst pressure, not just cold but heat as well.

One summer I left my garden hoses out in the summer heat; this particular summer it was a veritable drought, and we had weeks on end of triple digit temperatures.

I turned on the hose and it burst, not only in the nozzle but in the middle of the hose where apparently the heat had seared through a hole. I had to buy a new hose, and made it a point never to leave it outside again.

By NathanG — On Nov 06, 2011

Watch out for your pipes, especially in the winter time. Stainless steel pipe burst pressure is affected by the cold temperature.

If it’s freezing overnight, you’d be better off turning on the tap water and letting the water trickle, dripping a little at a time. That will keep your water flowing, preventing any possible freezing and eliminating the possibility of burst pipes.

Don’t worry about the possibility of wasting water. That’s mere pennies on your water bill. Burst pipes will really dig a hole in your wallet.

Mary McMahon

Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

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