WEFATHERM Pipe System PP-R
Properties of the polypropylene material PP-R
The basic material of the WEFATHERM pipe system is polypropylene random-copolymer PP-R. This material is characterized by excellent properties such as elasticity, rigidity, tightness, compression strength and a special resistance to high temperatures and extraction. In addition PP-R possesses high resistance to a large number of materials which might pass through the pipe system in liquid or gaseous form. This material is particularly suitable for use in drinking water systems.
Excellent internal pressure resistance also at high temperatures
Our raw material is not only PP-R classified, in addition it shows superior performance characteristics at elevated temperatures. The unique temperature resistances of allows for high safety margins in practical applications.
PP-R ascertains high safety for longtherm, trouble free operations of your sanitary installation. It is the first choice of PP-R raw material for a reliable sanitary piping system.
PP-R has unique safety reserves as it can demonstrate compliance to the refence curves simultaneously at 20° C, 70° C, 95° C, and 110° C based on third part testing and ISO/ TR 9080 assessment.
Mechanical and thermal properties
In accordance with its areas of application, the WEFATHERM pipe system is designed for continuous temperatures of 0° C to 7° C, short-term peak temperatures of up to 100° C and a services life of min. 50 years.
Creep-depending-on-time test under internal compression
The creep-depending-on-time test under internal compression provides information on the high quality of the WEFATHERM pipe system. All the components in the system have been subjected to a multitude of test at different pressures and temperatures. These tests were carried out up to destruction or fracture. Test structure and test sequences are in accordance with the standards.
Permissible operational pressures in accordance with DIN 8077 for drinking water or heating systems
Temperature and pressure play an important role in respect of the operational safety of WEFATHERM pipe systems. The permissible operational over pressures for the different pipe series which are defined via the pressure stage PN whereby a safety factor of 1.25 has been taken into account in all cases. Drinking water is one of our most important elements and is accordingly subject to very strict regulations not least in respect of the materials with which drinking water may come into contact. Since WEFATHERM pipe components are joined by heated-sleeve welding, no substances or materials that are detrimental to health or that are in any way questionable come into use. Regular checks are carried out as a matter of course by the DVGW ( German Association of the Gas and Water Profession) , the SKZ ( South-German Plastics Centre) and the Technologiezentrum Wasser of the University of Karlsruhe.
Drinking water systems
Due to its special material properties and chemical resistance, WEFATHERM pipe systems can be used for a wide range of areas of application including system for drinking water and water for other purposes in houses and residential buildings, offices, schools, hotels, hospitals, ships etc. Agriculture and horticulture, compressed air systems, heat distribution systems, heat generation connections, distribution connections, floor distribution systems, rising mains, industrial pipe works, the foodstuffs industry.
Heating and air conditioning systems
The WEFATHERM pipe system with its components enables transitions to existing systems of other materials to be achieved in a problemfree manner without any compromises. Polypropylene is corrosionfree and resistant to thermal aging. In addition it gives no opportunity for deposits to form. Flow noises are damped to a large extent.
As result of the low heat conducting capacity of PP-R pipe systems isolation can be neglected, i.e.
PP-R pipes for cold water conduction do not need any isolation.
The low heat conducting capacity of polypropylene almost totally prevents the appearance of condensed water outside the pipe.
The WEFATHERM pipe system and its components
The WEFATHERM pipe and the WEFATHERM Stabi pipe are two components well adjusted to their practical application. With the help of the molded parts they can be connected easily, even in the transition to fittings or pipe systems of other materials.
The advantages in application of our new developed WEFATHERM Fiber pipe are low longitudinal expansion exposition ( significantly less) , higher circulation with maximum floe capacity, higher pipe stiffness as well as simple treatment without additional peeling process.