Every year the heating market is changing. New
brands are emerging, new technologies are being introduced, and new development
trends are emerging. Here is one of them - the popularization of PERT pipes for
floor heating. What distinguishes this material from cross-linked polyethylene,
I described in a previous article. Today I want to make a brief overview of the
Ukrainian market for these pipes.
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| Pict.1 PERT pipes |
The segmentation of brands representing this
pipe I would divide by geography. By the place of production. Most are in
Western Europe - Germany (TECE), Austria (Herz), Italy (Emmeti, RBM, Unidelta,
Watts, Immergas), Czech Republic (Wavin, FV Plast), Poland (KAN Therm,
Capricorn, Tweetop).
The rest - Turkey, Romania, Ukraine and China.
Maybe other countries. But this is difficult to verify due to the
inaccessibility of the documentation. In the middle and lower price categories
are - Valtec, Valrom, SPK, ASCO, Koer, ASG, Blue Ocean, Baux, VS Plast and
others.
The difference in quality is more difficult to
distinguish than, for example, in ball valves. The color of the pipe is not an
indicator. It does not affect the quality in any way. By the way, up to 80% of
all pipes are producing in red.
There is a difference in the type of material.
Here it is already more interesting. PERT is of two types - type I and type II.
The second type has more stable and better characteristics of heat resistance and
resistance to pressure. Also improved performance. This is indicated in the
marking directly on the pipe itself.
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| Pict.2 Top down: PERT of unknown brand, PERT type I, PERT type II |
These pipes differ in the number of layers - 5
or 3 (although they can even be single-layer, but more about this later).
Decipher:
The 3-layer pipe consists of - basic PERT
material, glue and oxygen barrier EVOH.
5 layer - PERT + glue + layer EVOH + glue +
PERT.
A five-layer structure needed to protect the
antidiffusion barrier from damage. Sometimes the manufacturer places an
inscription on the pipe - PERT-EVOH-PERT. It means that the pipe is
five-layered.
For installers, one more parameter is
important: the length of the bays. It is convenient when there are long bays of
500-600 meters. It can be stacked with a unwinder for pipes.
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| Pict.3 Characteristics of some PERT pipe brands |
Unfortunately, the conscientiousness of some merchants
leaves much to be desired. In the market there are pipes made of ordinary PE
polyethylene without an oxygen barrier, sold under the guise of PERT + EVOH.
Visually, this is difficult to determine. Here the visible figure is the price.
Cann’t the same product for quality cost 3-4 times cheaper.
Therefore, my recommendation is to buy
certified products "made in ..." from trusted suppliers. This will
ensure the operation of your system "warm floor" in the declared
reliability parameters and service life.
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