(1) Preheating stage: that is, in the preheating and crimping stage of the electric heating plate, a certain pressure is applied to the two pipe ports to melt the crimping.
(2) Endothermic stage: Apply a small pressure and a certain time to diffuse heat in the pipes to be connected to achieve uniform heat absorption.
(3) Conversion stage: the heating plate slamming stage. Keep the time to connect the pipe joints as short as possible.
(4) Welding stage: The melting ends of the two pipes are fused together and a certain pressure is applied.
(5) Cooling stage: natural cooling of fusion, be careful not to have tension and mechanical stress.
