The increase in the breach opening along the axis of the duct. In certain configurations, the duct thermal expansion may result in extension at the expansion joint location.
The fabric is comprised of various layers:
- Inner layer: Comprised of highly thermal and abrasive resistant fabric material. It is usually used for 1000 degrees F plus working conditions.
- PTFE/Fiberglass Composite LFP Corrosion Lined: The LFP Corrosion liner is 100 percent PTFE material that is capable of resisting the stress cracking caused by flexing and severe temperature fluctuation.
- Thermal Ceramics Fiber Blanket: This layer provides excellent resistance. It can withstand temperatures up to 2300 degrees F and chemical attack.