315/335/350/400/450/500/560/630/900 polyethylene pipe large diameter pe water supply pipe
1. Material preparation: Put the pipe or pipe fittings in a flat position and put them on the butt joint machine, leaving enough cutting allowance of 10-20mm.
2. Cutting: Cutting the impurity and oxide layer on the welded pipe section and the end face of the pipe fitting to ensure that the two butt joint end faces are smooth, clean and free of impurities.
3. Alignment: The end faces of the two welded pipe sections should be completely aligned, the smaller the wrong side, the better, and the wrong side should not exceed 10% of the wall thickness. Otherwise, the docking quality will be affected.
4. Heating: The butt joint temperature is generally between 210-230℃. The heating time of the heating plate is different in winter and summer. The melting length of both ends is preferably 1-2mm.
5. Melting butt joint: It 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.
6. Cooling: Keep the docking pressure constant, and let the interface cool down slowly. The length of the cooling time is based on the hard curling of the hand and no heat.
7. The docking is complete: After cooling down, loosen the slips, remove the docking machine, and prepare for the next interface connection.
1. Long service life: PE pipe can be used safely for more than 50 years under rated temperature and pressure.
2. Good impact resistance: PE pipe has good toughness and high impact resistance, and heavy objects will directly pass through the pipe without causing pipe rupture.
3. Reliable connection performance: The strength of the PE pipe hot-melt or electric-melt interface is higher than that of the pipe body, and the joint will not be broken due to soil movement or live load.
4. Good construction performance: the pipeline is light in weight, the welding process is simple, the construction is convenient, and the overall project cost is low.
5. Good sanitary performance: no heavy metal salt stabilizer is added during PE pipe processing, the material is non-toxic, no scaling layer, no bacteria breeding, and it solves the secondary pollution of urban drinking water.
6. Excellent corrosion resistance: Except for a few strong oxidants, it can withstand the erosion of a variety of chemical media; no electrochemical corrosion.