Let me explain just a moment on the use of polypropylene for heating systems. It is believed in my view mistakenly, that you can use reinforced polypropylene. No doubt this story many times more reliable than conventional polypropylene. But – in the market there are no reinforced fittings! The conclusion is simple: the problem of conventional PP remains – now in the joints. 3. Linear expansion of plastic pipes win here no doubt: a very low thermal expansion material – when heated at 1 C yield elongation of 0.02 mm. for each Meter – allows more aesthetically pleasing to hide pipes, saving space.
To save the metal-tube stock to change the volume, it is placed in a special protective case, a little more than pipe diameter. It enough to keep all repairs on the outside and all the pipes hidden under otdelku.Polipropilenovye tube, with the exception of reinforced, give a decent thermal expansion – when heated at 1 C yield elongation of 0.15 mm. for each meter. Accordingly, in no case can sew polypropylene tubes for finishing back to back: when the tube starts to "play", changing its original size, finish will be lost. 4. Thermal conductivity. For metal tubes are characterized by high thermal conductivity. This makes them more suitable for use in heating sistemah.Odnako polypropylene tubes, due to the low thermal conductivity, have an undeniable plus in water supply (they better keep the temperature of the water) 5.
Interaction with oxygen from the environment plastic pipes in the house at least susceptible to interaction with oxygen from the environment, what is most important for heating systems. It is therefore less likely to use polypropylene tubes for installation of heating systems. For metal pipes have high thermal conductivity. This makes them more suitable for use in heating sistemah.Odnako polypropylene tubes, due to the low thermal conductivity, have an undeniable plus for water supply (they better keep the temperature of the water) 6. Resistance to mechanical damage Metal pipes certainly more fragile. Their use in a residential area is always associated with the need to pipe insulation from external mechanical vozdeystviy.V this regard polypropylene tubes show greater relative stability, particularly with increasing tube diameter (and thus the thickness of the wall).