PE water supply pipe fittings electrofusion welding detailed operating procedures

As we all know, PE water supply pipe fittings commonly used heat fusion and electrofusion connection two methods to connect the pipe.

Here and odd pipe industry to give you a detailed introduction to PE water supply pipe fittings electrofusion welding operation steps:

The connecting end of the pipe is required to be cut vertically; high temperature can not be generated when cutting, to avoid high temperature caused by the deformation. Measure and use a pen to mark on the pipe inserted into the depth of the fittings or welding area (such as saddle-type fittings) Note that the pipe end face should be perpendicular to the axis of the cut-off weld, the pipe weld area is clean and clean, should be inserted into the depth of the fittings to re-labelling. If the pipe is not end face perpendicular to the axis cut off, it will result in part of the weld area exposed, which will cause welding errors such as the flow of molten material into the pipe.

Scrape the oxide layer on the surface of the pipe with fine sandpaper, scraper, etc., wipe off the dirt on the connecting surface of the pipe and fittings with a clean cotton cloth, and mark the insertion depth line. Polyethylene pipe after a period of storage, it will form an oxide layer on the surface. Welding near the front must be welded area of the oxidation layer PE water supply pipe fittings.jpg completely removed otherwise it will affect the quality of welding, resulting in safety hazards. In the stress-free conditions installed electrofusion fittings, can be rotated by hand, if not in stress-free conditions accurately installed, in the welding will be melted material overflowing pipe fittings end surface or overflow into the pipe such accidents. Be careful to remove the pipe inside and outside the surface of the prongs and residual debris, pipe and pipe fittings welding surface must be clean, dry, no grease in the scraping off the oxidation layer after the installation of polyethylene can be used before the special cleaner or more than 96% of the alcohol and no debris and colourless paper to clean up.

Sleeve the electrofusion fittings into the pipe to the specified depth, and connect the welder with the fittings.

Adjust the position of the pipe and PE water supply pipe fittings, so that the pipe and pipe fittings in the same axis electrofusion fittings, to prevent eccentricity caused by the joint welding is not solid, gas tightness is not good.

Energised heating time, voltage should be in line with the provisions of the electrofusion welding machine and electrofusion pipe fittings manufacturers to ensure that the supply voltage, heating time, to obtain fusion joints, the power supply connection should be noted before the use of the voltage and the cross-sectional area of the input cable, the welder plug into the pipe fittings jack, accurately enter the pipe fittings on the calibration of the welding time (FUS10N) and cooling time (COOL). Press the confirmation key (ASCERTAIN), the welder will display the welding parameters again, after complete confirmation, then press the start-up key (START-UP), start welding. When the welding process is finished, the welder will automatically alarm and prompt. Please record the welding parameters and operation time and operator on the pipe.

PE electrofusion pipe fittings welding temperature: 160 + / - 10 degrees Celsius, polyethylene (PE) pipe welding general principle: polyethylene (PE) can generally be melted in the range of 190 ℃ - 240 ℃ (different raw material grades of melting temperature is generally not all the same), at this time, if the pipe (or fittings) two melted part of the full contact, and to keep appropriate Pressure (electro-thermal welding pressure, from the welding process of polyethylene itself produces heat.

As PE water pipe joints can only reach its compressive strength after all cooling to room temperature, other external forces during cooling will make the pipe, pipe fittings can not maintain the same axis, thus affecting the quality of fusion welding, therefore, during the cooling period shall not be moved to be connected or in the connection of external forces.