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4 Uses for an Exhaust Flex Joint

Posted on November 4, 2018

When completing the installation of a heating and air conditioning system, dryer or ventilation system, there is one key step needed to complete the process. This step is known as the installation of the
exhaust flex joint.

The exhaust flex joint is a key component of a ventilation system in the exhaust industry. Attached to duct work, it secures to the machine, and then the duct work travels to an exterior vent source. In essence, the exhaust flex joint connects the two parts of the system. It is a conduit, and without it the system could not function.

Another way to refer to the exhaust flex joint, although the two are not exactly the same, is metal bellows. Metal bellows, and metal expansion joints are designed to withstand great stress. They also help with engine vibration and serve to reduce noise.

In order to function effectively, the metal flex joints and bellows must be constructed to withstand extremely high temperatures. Specifications from the ASME require that forged steel 150# flanges handle pressure at 100 degrees Fahrenheit of up to 285 psig, for instance.

Interestingly, a new metal was discovered in 2015 by Brown University researchers. This material, with a melting point of 7,460 degrees Fahrenheit, will be of great help in the creation of custom bellows and research for new types of a pipe expansion joint.

The exhaust flex joint is used in the HVAC industry, the exhaust industry and in driers on the industrial, commercial and residential levels. The main use, primarily, is in driers. It is imperative that a strong, durable joint be attached to the machine on one end and to duct hose on the other.

A secure connection is of utmost importance for the health and safety of all who are exposed to the machinery (in this case, a dryer). The longevity of the joint is key, as well, in determining safety. The other three uses for the joint would be in a ventilation system a heating system and an air conditioning system.

To sum up, the exhaust flex joint has a distinct and important function in the ventilation industry. Careful manufacturing and installation will make sure that ventilation with an exhaust flex joint system or metal bellows is done safely and securely, and then it will last for years to come.

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