Reasons For Brittleness Of Ppr Tube At Low Tempture

PPR pipe is more and more common in the current society, because its own advantages and characteristics make it occupy a very important position in the pipe industry. It is random copolymer polypropylene, which is what we call type III polypropylene . It is obtained by random copolymerization of propylene monomer and a small amount of ethylene monomer under heating, pressure and catalyst. The ethylene monomer is randomly distributed in the propylene long chain, and the ethylene monomer is generally controlled between 3-5%. The ethylene content and the polymerization method of ethylene and propylene determine its cold brittleness. In the case of low temperature, especially in the winter construction process, the flexibility is reduced at low temperature, the rigidity is increased, and it is brittle. Under the impact of external force or excessive accidental load, the pipe may crack in a straight line. Bring inconvenience to construction. For this reason, relevant national regulations have made clear requirements for this issue. During construction in winter, attention should be paid to the low-temperature brittleness of the polypropylene water supply pipelines for buildings, and corresponding construction plans should be formulated.