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Inspection and operation steps before and after PE hot melt docking
Nov 26, 2018

Before and after PE hot-melt connection, it is necessary to clean the welder to indicate the heating tool. The welding indicates that the dirt is cleaned with a clean cloth. The polyethylene residue on the heating tool can only be removed with a wooden scraper; and whether the butt welder is checked The pipe diameter matches the specified butt weld cycle.


The heating time and heating temperature of PE hot melt connection shall comply with the regulations of the connection tool manufacturer and the pipe and pipe production plant. The welding temperature is usually between 200 °C and 235 °C; the hot melt connection pressure and cooling time shall be in accordance with the hot melt. It is stipulated in the connection tool manufacturing plant and the pipe and pipe production plant that the connecting parts should not be moved or pressure exerted on the connecting parts during the holding and cooling time.


At the beginning of the PE hot-melt process, move the movable clamp, plan the joint surface of the pipe and pipe fittings on the milling cutter, remove the milling cutter, and inspect the pipe joint connection surface so that the gap is no more than 0.3mm; straightening butt welding The two corresponding parts to be connected on the machine are on the same axis, and the wrong side should not be greater than 10% of the wall thickness.


The heating tool is placed between the two joint faces, so that the pipe on the butt welder is brought close to the heating tool and a certain pressure is applied, and the direct action melts to form a smoothly symmetrical flange along the entire outer circumference of the pipe. After the heating is completed, the connected parts should be quickly separated from the butt heating tool, and a uniform external force is applied to make them completely contact to form a uniform flange.

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