Use of High Temperature Fabrics for Flexible Ducts

High Temperature ducting is used in many industries such as steel industry, cement industry, chemical industry and is used to carry hot flu gases from one part of the plant to another or for exhaust systems. The temperatures of these hot flu gases can vary between 250 °C to 1000 °C. For such flexible ducts, we offer a customized heat insulation assembly as per requirements which consists of a complex assembly of our high temperature resistant fabrics, thermal insulation material and other supporting elements.


A client (Steel Plant) wanted the following expansion flexible ducting for their hot flue gas transport system upto a temperature of 1000 °C for the inner side.

For the above we designed a flexible duct consisting of an inner layer of High Silica fabric with an outer layer of Silicone Coated Fiberglass with a 4 mm MS wire frame for the giving the structure to the ducting stitched with high temperature kevlar and fiberglass thread.


The Vermiculite Coated High Silica fabric used is capable of continuous temperature resistance of 1000 °C and maximum upto 1600 °C.


For the Silicone Coated Fiberglass fabric the Silicone coating offers water, weather and chemical resistance with temperature resistance upto 250 °C. If temperature is above 250°C the coating will slowly wear away leaving behind fiberglass fabric which can still withstand upto 550-600 °C.





This high temperature fabric assembly offers outstanding temperature, chemical and structural resistance with a light weight system offering ease of replacement and transportation useful for maintenance work in exhaust systems and flu gas systems.


RNG Performance Materials customizes each of its thermal insulation assemblies to fit customer/ industry requirements. For any such requirements get in touch with us at Sales@RNG.Asia


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