Choosing the Right Flexible Metal Hose for Your Project

Flexible metal hoses are an essential component in aerospace engineering, as they are used for the conveyance of fluids and air in extreme environments. These hoses are designed to withstand extreme temperatures and pressures while maintaining flexibility to accommodate the movements of the aircraft.

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There are many different types of flexible metal hoses available on the market, and it is important to choose the right one for your project. AMETEK FMH is one of the longstanding and premier manufacturers of flexible metal hose assemblies.

Flexible metal hoses are constructed entirely from metal, with options available in stainless steel, Inconel, or titanium. They are typically rolled and welded, pressure formed, and may be seamless if required. The temperature range of these hoses is from -420°F to +1,200°F (-251°C to +649°C), with sizes ranging from ¼” – 36” ID (0.64cm – 91.33cm ID). The hoses may include braid wire or a combination of ducting where needed.

One of the most important features of flexible metal hoses is their performance capabilities. They can withstand pressures of up to 5,000psi in fluid and up to 16,000psi in air, making them ideal for high-pressure, high-temperature, and high-vibration environments. These hoses are used in a wide range of applications, including bleed air ball joints, exhaust seals, and flexible metal hoses.

When choosing a flexible metal hose, it is essential to consider the specific requirements of your project. Some hoses may be fire-resistant, while others may be custom designed for specific applications, including qualification testing, or built to print. Additionally, the number of layers and the size of the hose may also vary depending on the application.

In conclusion, choosing the right flexible metal hose is crucial to ensure the proper functioning and safety of aerospace systems. When selecting a flexible metal hose, it is important to consider the specific requirements of the application, the materials used in construction, and the performance capabilities of the hose. By carefully evaluating these factors, you can select the right flexible metal hose for your aerospace project. AMETEK FMH has been a leading choice of top industry companies for a number of years because of the quality of each hose products. 

It is critical that the proper metal hose assembly is selected for the required application. Many metal hoses look the same, but they are not. Therefore, it is essential that the right questions are asked, and features are considered when it comes to selecting the proper hose assembly.

Size

The size of the connection in diameter where the assembly is going to be installed is a necessary piece of information to get the proper fit.

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Temperature

When the internal and external temperature to which the metal hose assembly is exposed goes up, the strength of the assembly and components decrease. If the temperature of the environment is unknown, a temperature of 70 degrees Fahrenheit is assumed.

Application

The application is the configuration that the metal hose assembly is installed. The application includes the dimensions where the assembly must fit. Any movement that the assembly is going to experience also matters. If you do not know this, the correct hose type or length cannot be chosen.

Media

When discussing media, it refers to any chemicals the inside or outside of the hose may be exposed to. Therefore, knowing the type of media is important to ensure that the hose assembly is compatible with all of these chemicals.

Pressure

According to Precision Hose, a hose should be subjected to maximum pressure during testing because corrugation deformation occurs when the maximum pressure is exceeded. To determine the maximum rated test pressure, the maximum rated working pressure is multiplied by 150%.

End Fittings

It is essential that the fittings that will be needed are identified. This is critical to ensure that the end connections of the metal hose assembly where it fits into will be able to match up.

Dynamics

This refers to the speed at which the media will move through the metal hose assembly. If it has a high flow or abrasive material, it may cause failure.

When determining the appropriate metal hose assembly, it is critical that you know the answers to these questions to select the best assembly for your needs. Because all applications are different, considering type, size, alloy, length, and other factors is critical. These considerations must be for the entire configuration, such as hose and assembly components or expansion joints. If you need any assistance selecting the right metal hose assembly, call us today.

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