JOINTING TECHNIQUES

All “Eco HDPE” pipes can be delivered with different joint systems. The pipe ends are equipped accordingly and integrated directly in the pipe.

 

Integrated Electro-Fusion:

To weld plastic pipes and fittings with  help of Electro-Fusion has been a common method in the market for years. Above all because the joint technique is very favourable, simple and secure. “ECO HDPE” is using this technique for big pipes. A welding wire which is included in the socket is heated with the help of a special welding device whereby the two pipe ends (the socket and the spigot) are jointed together. By this fast jointing technique it is possible to install pipes in such a short period of time which has never been realizable before. Without any problems and with only one welding device it is possible to install a pipeline of 72 mm with a diameter of 1200 mm in 8 hours. The recording which is necessary for the quality assurance is realizable very easy and secure with the help of the welding device from “ECO HDPE”.

 

 

Welding procedure:

Generally the Electro-Fusion socket and the spigot are already prepared for the welding. After the basic justification of the pipe the plastic foil, which serves as protection, is removed. Now the welding area is cleaned with a special polyethylene cleaner. The connection of the welding wire should be at the top of the pipes as this facilities the later welding. Now the spigot can be shifted into the socket. The pipe is justified, the inside support ring is put into the right position and the outer tensile band is tightened.

The welding adapter is screwed on the ends of the welding wire, Now it can be connected to the welding device. On the pipe is a barcode, which includes all necessary information for the welding. With the help of a barcode reader this information is read and welding can be started. After having finished the welding a certain cooling time which depends on several factors, has to be respected. Only after this cooling time the inside support ring and the outer tensile band can be completely detached.

 

 

Electro-Fusion System

The advantage at a glance: 

• Quick welding

• Welding device at reasonable price 

• Welding possible in narrow trench 

• Welding of bigger pipes possible from inside 

• Quick assembly by using several welding device at the same time 

• Tensile strength 

• 100% permanent tight joint 

• Printed welding record 

• It is possible to use the Electro-Fusion immediately, even the pipe is still cooling

 

 

     1.0 V seam extrusion welding:

Pipes and fittings are jointed with the help of a extrusion welding extruder. The outsides of the ends are chamfered. Thus a welding seam is produced which looks like a V. Normally no socket-spigot connection is used. The welding has to be done according to DVS 2207 part 4.

 

 

    2.0 Extrusion welding:

The pipe and/or fittings, which shall be connected, are jointed by a socket and spigot joint. Thus the two pipe ends are jointed with an extrusion welding device. The jointing method can be carried out inside or/and outside of the pipe. This jointing is most suitable for low-pressure gravity and manholes. According to DVS 2270 part.

 

 

    3.0 Heat element butt welding:

The pipes and fittings are jointed with the help of a heating element butt welding machine. The ends of the pipes and fittings are butt-welded. This kind of jointing methods is only recommended for pies and fittings with a maximum wall thickness of 150 mm and with diameters from 300mm 2500mm. According to D2270 part 1.

 

 

    4.0 Flange connection:

The ends of the pipes and fittings are jointed with the help of steel flange and a rubber gasket. Depending on the type of pipe the flange adapters are completely manufactured with the pipe, or the flanges are available as separate fitting. This kind of jointing method is mostly used for open sea discharge application and for tank connections. The greatest advantage of this connection is the facility of disjointing.

 

 

    5.0 Gasket connection:

his connection also uses the socket and spigot jointing including a special rubber sealing which is installed into the spigot end of the pipe or the fittings. This method is also disjointable. The pipe ends has to have the minimum stiffness in the spigot and the socket according to EN 13476 and should withstand the test according to EN 1277 and EN 053.