Problem 4: the use of pipe connection PP-R pipe is not straight, the angle is too large, welding is not complete, not reliable.
Genesis: this phenomenon is called "distortion welding" ". The reason is that the pipe fittings are not kept in the welding, the pipe is inserted into the pipe, the pipe is bent, the pipe is inserted into the pipe, which affects the welding effect.
Solution: hot melt socket to ensure that the pipe and pipe to maintain at the same level line, and as far as possible in the pipe and pipe fittings from the die out after the rapid insertion of fusion, to ensure the quality of socket.
Problem 5: metal insert cracking
Cause: when the construction of the embedded parts subjected to external forces to hit or install the use of metal tools, improper operation, the torque is too large to.
Solution: construction personnel in the construction of the installation should avoid heavy knock hit the pipe, pipe fittings and metal insert, the installation process so that the metal insert to achieve the working position can be avoided by all means to reverse the large.
Question 6: after the installation of water immersion, there is water seepage, green metal impurities may appear.
Cause: installation not in the male joint winding with raw materials and green metal impurities for copper product for a long time in the air and water contact oxidation and on the surface of copper oxide.