pvc pipe repair treatment

pvc pipe repair treatment methods are as follows :
1 stick Interface slight leakage : leakage of the adhesive bonding of the processing method can be used to trap the adhesive patch . This method must first be drained within a pvc pipe water , and to form a negative pressure within the pvc pipe , and then the adhesive note  electrofusion coupling mould on the site of the leakage gap , due to the negative pressure within the pvc pipe , adhesives sucked gap , and reached only the purpose of the drain .
2 bonding flange leaks : the water drained , lifted gate . The pvc pipe spigot end connection flange joints wipe with adhesive brushing .
3.pvc small area of ​​the pipe due to external causes damage , cracks, and the physical properties of the surrounding unchanged bonding method can also be processed ( patch ) . Method: the memory of water drain pipe , the pipe will be damaged parts of the surface roughening ; cross section of the same pipe diameter , whichever half ( covering an area larger than the damaged area ) , the inside of the selected segment wipe fight hair , damaged parts in the pipeline painting the inner surface of the tube sheet  pipe reducing coupling mould and the selected patch adhesive sheet to cover the repair pipe pvc pipe damaged parts of the surface compression and fastening pipe card or wire ( two ) .
4 between the flange and valve gasket leaking valve at both ends of the pipe section shall be adjusted to the same level symmetrical with the gate and then tighten bolts.
.. 5 welding repair method : a welded parts should be made dried , and clear their dust, oil and other fats surface ; bonding interface when welding repair , the adhesive must be cleaned before welding.
b.pvc pipes and fittings slight leakage without affecting the structural safety under conditions , can be repaired by welding rod pvc-u , the ambient temperature is not lower than 5 degrees Celsius. When using the multilayer welding , after a period of time to cool , then the  chinese mould next layer welding. When welding , the need to maintain the proper temperature and pressure , hot air temperature should be 260 degrees -290 degrees Celsius. Overheating of the material easily deformed or carbonized high pressure may cause rupture of the weld after cooling .
c. bead should be beyond repair parts around the edge of each 9mm-13mm.