Let's Talk About the Unique 'Little Guy' – The DN50 Electrofusion Flange
Today, let's talk about a somewhat special "small-sized" item in the electrofusion fitting family – the DN50 Electrofusion Flange.

A Different Look

If standard electrofusion fittings (such as couplers and elbows) are the "internal connectors" of the piping world, then the electrofusion flange is a true "diplomat."

Its appearance sets it apart from other products: the bottom half features the familiar electrofusion socket design, while the top is capped with a flange. The standard electrofusion component contains embedded resistance wires, allowing this small part to be welded onto the PE pipe. The other end is the flange cap, evenly distributed with bolt holes.

'Niche' but Important?

Within the electrofusion flange range, DN50 is considered a "small diameter," making it less common. However, this only emphasizes its unique value. It is primarily used at critical connection points where a PE piping system needs to interface with external components:

- Equipment Connections: such as pumps, valves, water meters, filters, etc.
- Pipe Material Transitions: When a PE pipe needs to connect to an existing section of steel pipe, cast iron pipe, or other materials, the electrofusion flange offers the most reliable and easily detachable option.

Name	Electrofusion Flange
Specification	FL50
Packing Type	Carton
Quantity per Carton	220
Weight (kg)	0.15
Inner Diameter (mm)	50
Outer Diameter (mm)	66
Wall Thickness (mm)	8
Height (mm)	76
Socket Depth (mm)	69

How to Use It

Step 1: Electrofusion "Bonding"
Just like connecting other electrofusion fittings, scrape the oxide layer from the end of the DN50 PE pipe and insert it into the PE socket of the electrofusion flange.

Use an electrofusion welder to scan the barcode and initiate the heating and welding process. After cooling, the PE pipe and the flange's plastic body become inseparably bonded.

Step 2: Bolted "Connection"
Align the assembled unit with the equipment or flange to be connected. Place a gasket between the two flange faces, insert the bolts, and tighten the nuts to achieve a secure seal and connection.

FAQ

Q: For small-diameter pipes, why choose a more expensive electrofusion flange over a cheaper flange adaptor clamp?

A: Analysis: This is a common dilemma customers face when weighing cost against benefits during selection.
Core Answer: The key advantages of the electrofusion flange are "rigid support" and "permanence."
A flange adaptor clamp relies on a mechanical clamp and a rubber seal, creating a flexible connection. It may be prone to slight movement under load or water hammer, offering somewhat less long-term reliability.
An electrofusion flange, however, becomes one with the pipe, creating a rigid connection that lasts the life of the pipeline. It provides more stable support for connected equipment (like pumps and valves) and requires almost no maintenance. It is particularly suited for applications involving vibration, pressure fluctuations, or where absolute reliability is required. Although the initial cost is higher, the lifecycle cost is often lower.

Q: What is the most critical precaution during installation?

A: The most crucial point is "alignment"! After fusion welding but before tightening the bolts, ensure that the two flange faces are parallel and the bolt holes align properly. Avoid using excessive force to pull or pry them into alignment, as this can create harmful stresses in the PE body, potentially causing problems over time.

Summary

Don't be deceived by the small size and low usage volume of the DN50 electrofusion flange. It plays a key "diplomatic bridge" role within PE piping systems. With precise craftsmanship and clever application, it's a "magic tool" for solving specific connection challenges. If your project involves connecting PE pipes to equipment or valves, this is a solution worth considering!

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