SIFFO HDPE (High-Density Polyethylene) electrofusion fittings are specially designed for joining HDPE pipes using electrofusion welding technology. These fittings have built-in heating wires that melt the pipe and fitting surfaces when an electric current is applied, creating a strong, leak-proof joint. They are widely used in gas, water supply, industrial pipelines, and mining applications due to their durability and corrosion resistance.
Key Features
·Strong & Leak-proof – Ensures a homogeneous fusion for a permanent joint.
·Corrosion Resistant – Suitable for aggressive environments.
·Easy Installation – Requires minimal equipment and labor.
·Long Service Life – Resistant to chemicals and UV radiation.
·High Pressure Resistance – Suitable for high-pressure fluid transport.
Electrofusion fittings mainly include equal diameter straight connectors, reducing straight connectors, equal diameter tees, reducing tees, equal diameter 90°/45° elbows, flanges, etc., used to connect plastic piping systems. HDPE electrofusion fittings are a type of heat fusion welding, referring to plastic fittings where metal wires are embedded inside the pipe ends. Heating with an electric current causes the resistance wires on the inner surface of the fitting to heat up, thus fusing the pipe and fitting together. Due to price considerations, heat fusion fittings are used more frequently than electrofusion fittings in engineering applications. However, electrofusion fittings play an important and irreplaceable role in engineering and maintenance, especially during construction where they are less affected by external environmental and human factors, resulting in better reliability and greater user appeal. Electrofusion fittings are increasingly used, particularly in gas pipeline projects.
HDPE Electrofusion Technical Specifications
Material:HDPE (PE80/PE100)
Connection Methods:Butt fusion
Pressure Rating:PN1.0MPa, PN1.6MPa PN2.0Mpa PN2.5Mpa PN3.0Mpa PN4.0Mpa
Size Range:DN20mm ~ DN800mm (custom sizes available)
Operating Temperature:-40°C ~ +60°C
Color:Black (custom colors like blue/yellow for identification)
HDPE Electrofusion Fitting Installation Steps
1. Cut the pipe vertically. Use a scraper to remove the surface oxide layer from the section of the pipe to be inserted into the electrofusion fitting.
2. Mark the insertion depth of the electrofusion fitting on the pipe surface using a marker.
3. Insert the pipe into the electrofusion fitting to the marked depth, ensuring the pipe's centerline coincides with the fitting's.
4. Secure the pipe and fitting together using clamps to prevent misalignment or loosening during welding.
SIZE(dn) | PN10 | PN16 | PN20 |
L63 | √ | √ | √ |
L75 | √ | √ | √ |
L90 | √ | √ | √ |
L110 | √ | √ | √ |
L125 | √ | √ | √ |
L140 | √ | √ | √ |
L160 | √ | √ | √ |
L180 | √ | √ | √ |
L200 | √ | √ | √ |
L225 | √ | √ | √ |
L250 | √ | √ | √ |
L280 | √ | √ | √ |
L315 | √ | √ | √ |
L355 | √ | √ | √ |
L400 | √ | √ | √ |
L450 | √ | √ | √ |
L500 | √ | √ | √ |
L560 | √ | √ | √ |
L630 | √ | √ | √ |
L710 | √ | √ | √ |
L800 | √ | √ | √ |