One of the questions that may arise when you think about installing a siphonic system is: what kind of material is best for my project? The most used options are the PVC-U and polyethylene.
Although from Sifonika we provide both options, we want to show the advantages of the Sifonika PVC-U system, because they refer to many of the areas which the new CTE emphasizes:
1. Higher structural safety.
Sifonika Flexible pipes in PVC-U ease the installation and absorb the expansions without transmitting efforts to the collector or the outlet. They streamline and simplify the installation of the siphonic drainage system due to the flexibility of the element and its closing "click" system. They absorb all the expansions and contractions caused by temperature changes without transmitting such efforts to the collector or outlets.
The Sifonika PVC-U system does not need to be on a rail. The PVC-U has a linear expansion coefficient of 0.060 to 0.080 mm / ° C / m., While PE has 0.2 to 0.23 mm / ° C / m, so we can say that the PVC-U expands about 3.5 times less than the PE. This allows us to conduct the installation with sliding clamps and without rail, since we allow collectors to expand and contract freely through said clamps.
2. Lesser loads on the structure, greater safety and control of the installation.
In the Sifonika PVC-U system, the larger diameter pipe we use is 200 mm. giving us greater control of the installation and enhanced safety.
3. The Sifonika PVC-U system pipes have more hydraulic capacity.
Furthermore, to equal DN and PN, PVC has greater hydraulic diameter, since the wall thickness of the pipes can be smaller due to the greater stiffness of the material. In terms of volume of water transported these differences can range from 3% to 14% difference in the diameter function which in many cases can mean a commercial diameter reduction in the calculation.
4. Continuity of hydraulic diameter in all joints.
In the Sifonika PVC-U system, all joints are made with dovetailed accessories to keep the hydraulic section. As for the PE system and the butt weld joints some burrs are produced outside and inside that reduce the useful hydraulic pitch section being able to cause turbulence or noise in the system and delaying the full laminar speed.
5. PVC-U pipes have a lower roughness.
The PVC-U pipes provide less pressure drop, due to the smoothness of their inner surface. Also by the absence of deposits and encrustation on the inner section. Moreover, its lightness eases transport, handling and installation, reducing cost. The absence of corrosion and oxidation ensures long life of the pipe.
6. Increased safety in case of fire.
The Sifonika PVC-U system is self-extinguishing and does not emit incendiary drops. The PVC is classified as B-s2, d0 in current regulations (old M1 classification). European classification of the fire resistance owners is governed by the UNE-EN 13501-1:2007 Standard. The certificate of French LNE No. L060201 provides that our Sifonika PVC-U System has such a classification and is broken down into:
- In connection with its reaction to fire behaviour it is classified as B, i.e. it has a very limited combustibility.
- The additional classification in connection with the production of smoke is s2, that is, as for the smoke density and its amount and rate of emission, it is medium.
- The additional classification in relation to particles or droplets of fire is d0, i.e. it does not cause falling of droplets or particles at 600 s. So the reaction to fire classification of our products is: B-s2, d0 (according to the above classification or M-1).
7. Increased operational safety.
Greater ease and simplicity of maintenance. Moreover, with our Sifonika PVC-U system we can say that any subsequent repairs are much simpler given the simplicity of the support used and no special staff or equipment is necessary.
8. Greater environmental protection.
The PVC-U is an inherently sustainable material. The PVC-U, one of the most used polymers in the world and the first that began to be produced on an industrial scale, it is obtained by polymerisation of a monomer: vinyl chloride. Once polymerised this monomer is transformed into a totally different starting material: polyvinyl chloride or PVC. The final product is chemically inert and completely harmless, whose molecules are composed of 43% from fossil fuels and 57% derived from common salt, virtually inexhaustible resource.
Therefore, PVC plastic is less dependent on oil. It also has specific owners that make it the most versatile plastic, hence its wide range of applications in various sectors. I hope I have clarified many doubts surrounding this material. Now I leave in your hands the final decision.