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Home » Categories » Metallic Expansion Joints

What is expansion joint ply?

Ply refers to the number of sheet metal thicknesses used in the forming of the bellows. Therefore, a 2-ply bellows would be composed of two sheets of metal.

48″ Tied Universal Expansion Joint with Two-ply Bellows
48" Tied Universal Expansion Joint with Two-ply Bellows
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