PE Butt Fusion Drainage Fittings Flange Bushing

Main Functions

Establishing Fixed Anchor Points in the Pipeline (Axial Restraint / Anchor Point)
It creates rigid fixed points within the piping system to restrict axial movement (prevent axial displacement). This prevents overall pipe displacement or pull-out under the effects of thermal expansion/contraction, water hammer, negative pressure, or high flow velocities (3-6 m/s).
Controlling Compensation Direction and Travel When Used with Expansion Joints
When paired with expansion joints, the flange bushing limits the direction of expansion/contraction and the maximum travel distance (typically unidirectional restraint). It allows absorption of thermal expansion/contraction while preventing excessive sliding that could cause joint disconnection or interruption of the siphonic effect.
Preventing Pipe Shear or Pull-Out (Anti-Shear / Pull-Out Protection)
At branch connections, bends, or locations passing through walls/floors, the flange structure provides strong thrust restraint. It prevents the pipe from being "sheared" or pulled out under high positive/negative pressure conditions, especially in branch lines or long horizontal runs.
Facilitating Flange Connections and Bracket Fixing
The flange plate can be used with loose flanges, bolts, or supports to achieve secure anchoring. It is also suitable for threaded connections or as fixed points in concrete embedment applications.

This component is essential for maintaining structural stability and long-term reliability in same-floor siphonic drainage systems, particularly when combined with expansion joints to form a "fixed + sliding" compensation system.