Double Expansion Joint

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A double expansion joint consists of two single joints joined by a common connector, or center spool, which is anchored to a rigid part of the structure by means of an anchor support base.  Badger's double expansion joints are supplied with or without an anchor support base depending on the customer’s preference.

Typically installed in long pipe runs where the axial movement exceeds the capabilities of a single joint, each bellows functions independently as a single unit.  The intermediate anchor on the center spool divides this movement between each bellows which should have the same number of convolutions.

It is good practice to use an intermediate anchor in conjunction with two main anchors to divide the pipeline into individual expanding sections. This ensures there is only one expansion joint between any two anchors. 

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