1. Preparations and precautions. The connecting pipe sections shall all be made of the same material, and the supporting materials of the same factory shall be used as far as possible; the outside diameter and wall thickness of the butt pipe section shall be the same and the error shall be within the allowable range; the inside and outside surfaces of the pipe and fittings to be welded shall be smooth and flat, without abnormalities; The butt pipe sections should have good machining and welding properties that match the welder. When welding in cold weather and windy conditions, protective measures shall be taken; surfaces to be welded must be scraped off and cleaned before welding; fused pipe fittings shall not be unpacked when not in use, strictly in accordance with the instructions of the welding machine and the bar code of the fittings The time value is used for welding; during the welding process and during the cooling phase after the welding is completed, the connecting piece must not be moved or any external force applied.
2. electrofusion connection operating points. Clean the dirt on the connecting surface of the pipe, mark the insertion depth, and scrape the skin; the pipe is fixed on the frame, and the fused pipe fittings are put on the pipe; the connection pieces are straightened to ensure that they are on the same axis; cool down. When connecting, the voltage and heating time when electrifying the heating should be selected in accordance with the regulations of the manufacturer and the manufacturer of the pipe fittings. During the cooling of the fused connection, the connection must not be moved or exert any external force on the connection.
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