A fabric expansion joint is inserted into a gap in the duct work where movements will occur. It's purpose is to compensate for duct misalignment and duct thermal growth in ducting systems. The temperature and chemical resistance capability  will be determined by the type of fabric(s) used to  produce the expansion joint. So, a fabric expansion joint can consist of multiple layers of industrial fabrics, which are carefully joined together.

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The advantages of fabric expansion joints are:

• Compensates for movements in several directions simultaneously

• Minimal reactive forces

• Advanced insulation design ensures minimal heat loss

• Reduced surface temperature on the outer layer during operation

• Requires little space for installation

• Easily adapts to existing physical conditions

• Easy to transport