Lens Expansion Joints
Lens expansion joints, including lens type metal expansion joints, offer secure movement absorption in large-diameter lines. Optimized for high impact resistance, corrosion protection, and rapid on-site maintenance.
Lens Expansion Joint Models
RoundTec
The angular variation of U-profile segments in RoundTec lens expansion joints absorbs axial and angular movements, while the main pipe handles lateral movement. Designed per AD2000 B13 standards.
Manufacturing: Single-piece (high flexibility) or circumferentially welded (wide thickness range).
Configuration: Single/multi-segment; custom flange and connection solutions.
Options: Drainage nozzles, limit rods, pantograph, hinge.
PolyTec (Polygonal)
In rectangular/polygonal ducts, PolyTec lens expansion joints manage axial, angular, and lateral movements with segment angles and the middle pipe.
- Single-Angle Corner: Economical, for low-vibration lines.
- Double-Angle Corner: Uniform stress distribution, longer lifespan.
- Rounded/Full-Round Corner: Reduces vibration-fatigue effects.
- “Camera” Type: Cost-effective for low-pressure systems.
Typical Manufacturing Ranges
| Title | Value |
|---|---|
| DN Range | 200 – 12,000 |
| Sheet Thickness | 1 – 10 mm |
| Segment Height | See: Custom solutions for AD2000 |
| Connections | Flanged, rotating flanged, welded neck |
| Options | Limit rods, pantograph, hinge; drainage nozzles |