What is a dual skin exhaust?

Dual skin exhausts, also known as dual walled exhausts, are an aftermarket exhaust system re-engineered to optimise thermal protection. As the name suggests, there are two steel walls, with a layer of insulation sandwiched between. These heavy-duty exhaust systems vastly reduce the surface temperatures of the exhaust components, bringing down the overall engine temp.?

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PURPOSE?

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Dual skin exhaust’s main purpose is to reduce surface temperature in?machine’s engine by isolating the heat from the?exhaust system. Lowering touch temperatures by up to 150°C, insulated exhausts drastically minimise the risk of burns or heat-related injuries to the operator or maintenance crew members. This extra level of safety also reduces machine down time, as technicians are able to access the engine bay sooner. Reducing heat also minimises the risk of fire which can cause total damage to the machine and catastrophic outcomes for workers.?

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Dual skin exhausts prevent heat-related damage in the exhaust and surrounding parts of the engine. Machine components can then perform better and last longer than heat-exposed parts. This is also relevant to smaller parts of the engine that are susceptible to warp or cracking.?

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HOW DOES IT WORK??

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As an alternative to a standard single skin exhaust, the dual skin component is fitted into existing framework with little to no modification. The internal insulation layer absorbs the heat generated in the exhaust, creating a thermal barrier, minimising heat transfer to the outer steel layer. A well-designed dual skin exhaust will also include insulated connectors?that eliminate the risk of hot spots at the joints.?

The temperature of an exhaust pipe on a mining truck or dozer can be between 300-400°C. A standard single skin exhaust offers no thermal barrier, whereas a dual skin exhaust can?reduce the surface temperature by 80%.?

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As opposed to external treatments such as thermal blankets or lagging, dual skin exhaust systems offer superior heat protection, they are maintenance free and can fit into the tight places that blankets are not suitable. Their durability often outlasts the life of the engine and are recommended as a long-term heat reduction device.?

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BENEFITS?

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Controlling heat is vital to preventing injury to workers and damage to equipment. As an alternative to a standard exhaust or to externally fitted thermal covers, dual skin exhausts offer many benefits.??

·???????? Keeps engines running longer and performing better?

·???????? Convenient alternative that fits existing framework?

·???????? Low thermal expansion prevents deformation under heat stress?

·???????? Maintenance free, easy to clean?

·???????? Durable and can often last the life of the engine?

·???????? Impenetrable to external fluid and debris?

·???????? Lower temperatures in engine bay, shorter downtime?

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APPLICATION?

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Dual skin exhausts are fitted to engines that require heat reduction and fire mitigation for safety. Commonly fitted to heavy machinery such as mining equipment, there are also power generation machinery, rail, and marine engines that can benefit from long term thermal solutions.?

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CONCLUSION?

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Regulating high temperatures in machinery prevents fire, injury, and damage. When safety is paramount, engineered controls such as dual skin exhausts, can be the most effective way to work with heat.??

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