HDPE Butt Fusion Expansion Socket Fittings for Siphonic Drainage

Key Features

• Displacement Compensation: Absorbs axial expansion/contraction due to temperature changes and displacement from building settlement.
• Fixed Butt Fusion End + Sliding End: One end permanently fused to pipe, the other is a sliding socket joint.
• Dual Sealing: Internal O-ring ensures leak-tightness during sliding movement.
• Expansion Markings: External markings indicate maximum expansion capacity and installation reference lines.
• High Pressure Rating: Suitable for demanding siphonic drainage conditions.

Production Technology

• Consists of socket, spigot, sealing ring, gland, etc.
• Socket and spigot injection molded from HDPE, EPDM sealing ring

Critical Process Parameters

• Fit clearance and smooth sliding between socket and spigot
• Sealing ring compression and aging resistance
• Precise control of maximum expansion capacity

Typical Applications

• Thermal expansion compensation for long horizontal siphonic mains
• Displacement absorption at stack-to-horizontal transitions in high-rise buildings
• Flexible connections at building expansion or settlement joints
• Fixed support anchoring in long straight pipe runs

Application Scenarios

• Nodes requiring displacement compensation in siphonic drainage piping
• Large commercial building drainage systems
• Industrial facility pipe installations