PPR pipe PVC pipe stainless steel pipe fitting pipe how to elected

To the city you will find building materials, water pipes, but dazzling, PP-R pipe, PVC-U pipe, plastic-lined steel, stainless steel pipe, copper, etc. variety.
Water should be stable and reliable, watertight, non-burst
We are talking about the safety of durability refers to a water pipe leakage does not occur within the life, the bursting of life-threatening security incidents and the family can ensure long-term use.
This requires the pipe to corrosion, high temperature, antifreeze, has good mechanical properties. Comparison found that high temperature plastic pipe can not be, in the case of large temperature difference is high deformation resulted in leakage, and its compressive capacity of a small, easy to embrittlement, which are doomed to not be applied to long-term heat, and should not be used in the cold north is not suitable for high-rise buildings.
Composite Pipe Set the advantages of metal and plastic one, but it is precisely because of the expansion coefficient of plastic and metal is different from long-term use will inevitably lead pipe layer, resulting in harm.
Pairs of brass, we all know that sort of copper in chemical activity in the low order bits, stable performance, strong corrosion resistance. Copper is the metal has a certain strength and ductility, toughness excellent material, with excellent low temperature performance, therefore, both heat and fire resistance of copper water pipes will not be aging, but also has certain anti-frost performance. Beijing Union Medical College Hospital from the twenties of the last century, the copper pipe after installation of more than 80 years of vicissitudes of time and remains in good shows that copper pipes can be durable, with the life of the building the same long-term safety and reliability. In addition, the brass durable, thermal expansion rate is small, particularly suitable for embedding in a concrete wall without having to worry about cracking the walls. However, the price of copper more expensive.
Copper can inhibit the breeding of bacteria
Plastic pipe main ingredient for a number of polymers, which have a certain toxicity, is relatively easy to penetrate, particularly if used in direct drinking water supply system, its serious harm to human body. In another example, for a long time do not pipe, you suddenly find out that actually open the "yellow" water, prior to the galvanized iron pipes in the house easily such a thing happened, so that the "yellow" water is also hazardous to humans. Copper pipe materials can inhibit the growth of bacteria, E. coli in the brass within the province can not continue to breed more than 99% of E. coli and pneumonia bacteria into the brass Road, five hours later on their own eradication, maintaining clean drinking water.
PP-R, and copper can be buried in wall
We all know that plastic pipe installation will be extremely convenient, but the majority of parts are connected to metal parts, due to the mechanical properties of plastics and metals vary widely, easily lead to bursting or leaking, therefore can not be buried during the construction of a general wall can only be outside the laying. The PP-R, and brass and accessories varieties and specifications are complete, you can choose from any of 6mm-250mm. PP-R pipe can be achieved seamless welding, manufacturers may also be responsible for installation of buried walls, and its advantage is that prices were relatively cheap, easy construction. The copper tube cutting, bending, welding process is also simple to connect a variety of forms, there is brazing, card sets, crimping, plug, flange, groove, etc., fully able to meet a variety of different occasions, the situation Need.