Before and after hot melt connection, clean the welding machine indicator and heating tool. Welding indicates that the dirt is present and should be cleaned with a clean cloth. The polyethylene residue on the heating tool can only be removed with a wooden spatula. The heating time and heating temperature of the hot-melt connection shall comply with the regulations of the connection tool production plant and the pipe and pipe production plant. The welding temperature is usually between 200 ℃ and 235 ℃.
Hot melt connection holding pressure and cooling time shall comply with the regulations of hot melt connection tool manufacturers and pipes and pipe production plants. During the holding pressure and cooling time, the connecting parts shall not be moved or pressure shall be applied to the connecting parts.