HDPE Butt Fusion 90° Bend for Siphonic Drainage

Key Features

• Extra-Large Radius: Typical bend radius of 3D-5D or larger; minimal centrifugal force on flow, resulting in very low local resistance coefficient.
• Butt Fusion Joints: Flat end faces allow homogeneous fusion with pipes, creating permanent connections.
• Reduced Blockage Risk: Gentle curvature prevents debris accumulation and blockage at the bend.
• Maintains Siphonic Action: Extremely low pressure drop helps maintain stable negative pressure for full-bore siphonic flow.

Production Technology

• Injection molded using large-radius molds, or fabricated by hot bending of straight pipes

Critical Process Parameters

• Strict control of wall thinning in the bend area (≤5%)
• Consistency control of bend radius
• Angle accuracy: 90° ± 0.5° between end centerlines

Typical Applications

• Turn at the base of vertical stacks transitioning to horizontal discharge in siphonic systems
• Directional changes where minimal head loss is critical in siphonic piping
• Smooth turns at key siphonic nodes in large venues and airports

Application Scenarios

• Large-radius turns in siphonic pipelines where hydraulic conditions are critical
• Sports stadiums, convention centers, and shopping malls
• Large industrial facilities