FREQUENTLY ASKED QUESTIONS

Very simple: anoint with ordinary iodine - if it is colored - EVOH is, if it is worn out - a fake.

No difference. Just different technologies, no difference in physical and mechanical or operational characteristics. The main thing: if 5 layers are declared, then you should see the middle layer of EVOH - if you do not see it, but they tell you that it is, then you should think about it (and you don't need to smear the end with iodine - you just need to see the layer in the light). In this sense, a three-layer pipe benefits at least in that EVOH can be detected and verified. And if you were invited to the production - do not forget: there should be 5 extruders for a five-layer pipe.

In terms of strength and heat resistance, PE-RT is inferior to cross-linked polyethylene PE-X. But this difference is important for high-temperature radiator heating systems, but not for the warm floor system or low-temperature radiators. Those. wherever the operating temperature is up to 70 C, these materials behave absolutely IDENTICAL and there is no point in overpaying for PE-X. The arguments of "molecular memory" and "shape recovery" are more a matter of editing than exploitation. Moreover, after the so-called. Upon restoration, the strength of the pipe at the bend decreases by 20%, and the oxygen layer is completely absent. Thus, it is better not to “restore”, but to cut the given segment.

Unfortunately, there is no 100% way, however, let's try to give some tips:

1. The presence of a layer of EVOH - just anoint with iodine, if stained - EVOH is, if worn - no. Regarding the five-layer pipe - it's up to you, but only to the light, if you see it, it means there is, if you don't see it, but they say that it is, think about it ...

2. Try to scratch the outer layer with something - the density of EVOH is much higher than that of regular polyethylene, so it will be much more difficult to damage or scratch the outer layer.

3. Transparent inner layer - no color, haze or odor. If you observe something like that, it is better to refuse to purchase.

4. Packaging - a responsible manufacturer is very careful and attentive to the packaging of its product, its integrity during transportation and storage in the warehouses of its customers. Therefore, the packaging must be reliable, aesthetic and meet the requirements for reliability and functionality.

5. Minimum bending radius - due to the elasticity of PE-RT, it can provide a minimum bending radius, which is not always possible when using low-pressure polyethylene used in the production of "non-original" PE-RT pipes.

6. Upon installation at the time of crimping - carefully monitor the linear expansion, if it is more than indicated in the Product Passport - then you have a fake.

7. Request an original certificate of conformity for the proposed pipe (with a test report), as well as the Conclusion of the state sanitary and epidemiological examination. Study the provided documents carefully

8. Look at the production date - if I offer you a pipe made in Italy or Germany just a few weeks ago, then there is a reason to think about how it was delivered so quickly? Also, the Certificate of Conformity must be issued after the date of manufacture (when certifying a batch of products).