A loose flange, also known as a lap joint flange, is a type of flange that is not permanently attached to the pipe. Instead, it slides over the pipe and is used in conjunction with a stub end or lap joint stub. This allows the flange to rotate freely around the pipe, making it easier to align bolt holes during installation or maintenance.
Loose flanges are widely used in systems where frequent dismantling or alignment is necessary and are especially suitable for plastic or lined piping systems.
Key Features:
- Rotatable Design: Allows easy alignment of bolt holes, reducing installation time.
- Two-Part Assembly: Comprises a backing flange and a stub end, offering material flexibility.
- Non-Welded Connection: Ideal for systems where welding is not possible or practical.
- Versatile Compatibility: Can be used with a variety of materials including metal, PVC, CPVC, and HDPE.
- Smooth Surface Finish: Ensures a good seal with gaskets, improving joint integrity.
- Reusable Backing Flanges: Especially cost-effective in systems requiring frequent maintenance.
Available - 2“ / 2.5“/3“/ 4
- Water supply and wastewater systems
- Chemical and process industries
- Plastic piping systems (PVC, CPVC, HDPE, etc.)
- Marine and offshore piping
- Food and beverage processing
- Power plants and industrial utilities
- Water treatment and desalination plants
- Easy to Install and Remove: Simplifies assembly and maintenance, even in tight or complex layouts.
- Reduced Installation Time and Labor Costs: Because of its rotatable and slip-on design.
- Minimized Stress on Pipes: Accommodates slight misalignments and thermal expansion.
- Corrosion Resistance: Stub ends can be made from corrosion-resistant materials while using cheaper materials for backing flanges.
- Lower Material Costs: Only the pipe-contacting component (stub end) needs to be made of high-grade material.
- Ideal for Non-Metallic Piping Systems: Compatible with thermoplastic piping where threading or welding is not an option.