When welding and connecting many pipe fittings, there are some precautions. When welding PE hot-melt pipe fittings, it is necessary to check whether all parts of the welding machine work normally, especially whether the temperature of the heating plate of the welding machine is within the standard temperature range before use. The influence of surface temperature and environmental temperature on the actual temperature of the heating plate should be considered to prevent the actual temperature of the heating plate from exceeding 230 ℃.

Before butt joint of PE hot-melt pipe fittings, check the stagger rate, and the stagger rate shall not be greater than 10% of the pipe wall thickness. If the stagger rate is more than 10% of the pipe wall thickness, the welding interface will be smaller than the pipe wall thickness, which will affect the hot-melt butt welding effect. The calculation of heating time is based on the calculation method of tube wall thickness x 10 seconds when the pressure of welding machine is removed and the heating time begins to enter when a circle of two tube end faces contacting with heating plate turns over completely.

When connecting, do not forget the cooling time of PE hot-melt pipe after welding. There is a certain calculation method about the cooling time. If forced cooling methods such as water cooling and air cooling are used after welding, it will lead to false welding and affect the welding quality. Therefore, natural cooling method should be used for cooling.