Multi Layered Pipe System
The MLCP installation system offers the following advantages:
Certification – MLC pipe and connection systems are approved in numerous countries throughout the world, e.g. Switzerland, Netherlands, Italy, Norway, Poland, Russia, United Kingdom DVGW certification of MLCP system, including connection systems and the materials plated brass and PPSU. General test certificate of the supervising authority (ABP) for MLC pipe penetrations (bulkheads) R 30 to R 90 with ROCKWOOL Conlit shells 150 P/U for the outer diameters 14 to 110 mm.The Uponor multi-layer composite pipe (MLCP) is a pipe generation that unites the advantages of a plastic and metal pipe and therefore offers a high degree of flexibility and toughness, coupled with high pressure and temperature resistance. MLC pipe consists of a lap welded aluminium pipe with an inner and outer polyethylene layer. All layers are permanently bonded together by means of an intermediate adhesive layer. The PE material is noncross- linked polyethylene of raised temperature resistance according to German DIN 16833. Owing to the specific form of the octene side chains in the molecular structure of the material, a similar effect is achieved when polyethylene is cross-linked. Lap welding of the aluminium pipe produces a highly reliable and lasting connection on account of the wider joint. The thickness of the aluminium layer is therefore not decisive for welding and so can be adapted to specific handling requirements.Smaller dimensions of MLC pipes are designed so that the aluminium layer neutralises the snap-back forces of the plastic material, enabling easier pipe installation with minimal effort. Larger dimensions of MLC pipes and straight lengths of pipes have a greater aluminium layer thickness, making them stiffer and suitable for use as risers. The aluminium pipe is important for heat expansion. Owing to the permanent bond between plastic and aluminium, thermal expansion is determined by the expansion factor of the aluminium and roughly corresponds to that of a metal pipe, i.e. only 1/7th of the expansion of a pure plastic pipe. This offers advantages for pipe installation, since the use of compensating points is largely unnecessary. The smoothness of the inner plastic layer offers water no points of attack. Incrustration and corrosion are prevented in normal use. The transmission of flow noise or noise, e.g. emitted by circulating pumps, is reduced to a minimum due to the specific properties of the raw material.