Build Daily

Engineering Systems

August 12, 2017 18:08

Polypropylene pipes : the pressure

Polypropylene pipes, their maximum pressure and temperature

Indeed, anyone who installs in his house a polypropylene pipe, thinks about its reliability and performance.Everyone understands that the steel pipe can withstand high temperatures, and that's how they were predisposed polypropylene few people know.

To begin with, the polypropylene is inherently a polymer and hence is not suitable for high temperatures.Therefore, from 140 degrees Celsius it looses its structure and becomes soft.When the temperature reaches 175 degrees and begins to exceed this figure, polypropylene is melted and then the product is completely destroyed.

Polypropylene pipes , their maximum pressure

Fortunately or sorrow, but our heating systems are not designed for such temperature, and therefore polypropylene pipes can be safely installed in a home or apartment.Be aware that the maximum temperature at which the polypropylene does not lose its characteristics and can be used qualitatively - 95 degrees.Naturally, the higher the temperature, the lower will be the life of the pipeline.

alternative solution - reinforced polypropylene pipes

no secret that any material changes its dimensions when exposed to a certain temperature.Polypropylene is no exception.It will also tend to expand or contract.To eliminate the effect of swelling and sagging pipe manufacturers have created another type of polypropylene pipes - reinforced pipe.Their structure is slightly different in that the polypropylene layer is between the additional layer of aluminum foil or fiberglass, which prevent extension.Such a pipeline is recommended for modern heating systems.

Polypropylene pipes , their maximum pressure

Remember that not all plastic pipes are suitable for heating.In the pipeline with the PN20 marking the operating temperature can reach up to 60 degrees and above, but the PN25 easy to operate at 95 degrees.

Secrets and installation of the nuances of polypropylene pipe

As we said above, this pipeline has the ability to expand.This means that we should not do is firmly seated in its wall mounting.It is necessary to allow small movements of the pipe while increasing or decreasing temperature.The same rule applies to a concrete screed, where the pipe is installed in the allotted channel.It is also necessary to do a little bit wider.

When it comes to the supply of cold water, the rigid attachment is to be welcomed.You do not need to worry about the temperature, and on the polypropylene pipe cost is much lower than in the reinforced.

Polypropylene pipes , their maximum pressure

Also, do not bend much polypropylene piping.Despite its flexibility, reliability and efficiency set specific fittings and couplings.If you want to bend your product at an angle of 90 degrees, expect at least a significant reduction in the internal diameter of the pipe, or even her fault.

pressure that is able to withstand a polypropylene pipe

polypropylene pipe, when properly installed and subject to operational standards, will last within 50 years.At this rate, in addition to compliance with the temperature also affects the pressure, which is able to reach the index 30 kg / sm.kv..

course, the higher the temperature, the pressure should be lower.Simply put, the optimal level of pressure is 10bar.

Polypropylene pipes , their maximum pressure

As you can see for yourself, polypropylene pipes and even demand, but have some limitations.So before you make a purchase, select the exact pressure that will affect the pipe, as well as operating temperature.