Electro-fusion butt welding of HDPE pipes скачать в хорошем качестве

Electro-fusion butt welding of HDPE pipes

The butt welding method is the most commonly used method of joining HDPE pipes and fittings. No extra material is used instead the surface to be joined is heated by means of a heating plate. The melted surfaces are then pressed together and will fuse into each other forming a strong joint. The strength of the material is based on the fusion of atoms. Welding beads shall not be removed and are usually kept as a visual reference for the welding quality. Welding machines have strong body frames, guide rods for the pipes, a pipe end planer, and an electric heater plate. The compressive thrust is produced hydraulically or by means of a lever or spring mechanism. To achieve a good welding result it is better to use a proprietary machine. Generally, the electro-fusion butt welding operation of HDPE pipes is divided into the following steps. Create permissible working conditions. Connect the welding device to the mains or to the alternating current generator and check its function. Clean the joining faces beyond the welding area with a cleaning agent and unused, absorbent, non-dyed paper. Align and scrape pipe ends with the planer. Close the pipe ends against draughts. Check the alignment. Check the heating tool temperature. Clean the heating tool with a cleaning agent. Heat up surfaces to be welded. At the end of the heating cycle, detach the joining faces to be welded from the heating tool and move the latter out of the welding position. Drive the pipe ends together by applying the correct fusion pressure as indicated in the welding table while monitoring the welding bead formation. Unclamp the welded parts (pipes, fittings, etc.) when the cooling time has elapsed. Inspect visually for any visible anomalies. For the Method Statement visit: https://qaqcconstruction.com/2021/08/...