Similar procedures are used for all electrofusion systems with respect to preparation and assembly. Some fittings require the fusion time to be entered into the electrofusion(EF) box manually and are therefore described as manual fittings. Some fittings incorporate auto-recognition technology and the electrofusion (EF) boxes are described as automatic. The majority of fittings require a 39.5 volt supply but some larger couplers are designed to accept 80 volt supply.
Electrofusion (EF) fittings employ the same basic principle. The socket of the fitting incorporates an electrical heating coil. An electrofusion (EF) box supplies the electrical energy necessary to heat the coil for a set time as per the manufacturer’s instruction stamped on the fitting. When the coil is energised the material adjacent to it melts and forms an expanding pool which comes into contact with the surface of the pipe. The continued introduction of heat energy causes the pipe surface to melt and a mixing of pipe melt and fitting melt takes place; this is vital to produce a good weld. Following the termination of the heat cycle, the fitting and pipe are left to cool as per the manufacturer’s instruction stamped on the fitting and the melted material solidifies to form a sound joint.
Our engineers are trained to the highest industry standards and we have a strictly adhered to code of practice and procedure for the installation of electrofusion fittings which we have developed through years of experience in conjunction with manufacturer’s instructions to ensure electrofusion fittings are installed correctly and with traceability as we mark each coupling with weld number, date and our name etc and our electrofusion (EF) boxes can be easily downloaded and the information included in our completion report.