1. According to the pipes and fittings to be welded, select suitable clamping fixtures, clamp the pipes, and prepare for cutting.
2. Cutting the impurity and oxide layer of the welded pipe section and the end face of the pipe fitting to ensure that the end faces of the two pipes are flat, bright and free of impurities.
3. The end faces of the two welded pipes must be completely aligned, the smaller the wrong side, the better, and the wrong side should not exceed 10% of the wall thickness. Exceeding it will affect the quality of the butt joint.
4. The temperature of the butt joint is generally between 210-230℃. The heating time of the heating plate is different in winter and summer. It is better that the melting length of both ends is 1-2mm.
5. Remove the heating plate, quickly let the two hot melt end faces stick and pressurize. In order to ensure the quality of the welding, the shorter the switching period, the better.
6. Hot-melt butt joint is the key to welding. The butt joint process should always be carried out under melting pressure, and the width of the crimping should be 2-4mm.
7. Cooling adhere to the same butt pressure, let the interface slowly cool down, the length of the cooling time is based on the stiffness of the curling by hand, and no heat is felt.
8. After the butt is cooled down, loosen the clamp, remove the butt machine, and prepare for the next joint welding again.
