POLYMELT answers the frequently asked questions (FAQ) about applications, properties and installation of polypropylene random copolymer (PPR) and polypropylene random crystallinity temperature (PPRCT) pipes. This innovative material has proven itself in the plumbing and heating industry and offers numerous advantages.

What are the main applications of PPR and PPRCT?

PPR and PPRCT are primarily used in plumbing and heating installations. They are excellent for hot and cold water pipes, heating systems, and industrial piping systems.

What does SDR mean for PP-R and PP-RCT pipes?

SDR stands for “Standard Dimension Ratio” and is an measure that describes the ratio of a pipe’s outer diameter to its wall thickness. For PP-R (Polypropylene Random) and PP-RCT (Polypropylene Random Crystallinity Temperature) pipes, the SDR value indicates how thick the pipe wall is relative to the outer diameter. A lower SDR value means a thicker wall, resulting in higher pressure resistance. Conversely, a higher SDR value means a thinner wall, which makes the pipe more flexible but also less pressure-resistant.

How are PP-R and PP-RCT pipes and fittings connected?

PP-R and PP-RCT pipes and fittings are typically connected using a welding method known as “heat fusion” or “butt fusion.” In this process, the pipe and fitting are heated using a specialized heating tool and then joined together. Once the material cools down, a permanent, homogeneous bond is formed without the need for adhesives or sealants.

What benefits do PPR and PPRCT offer over other materials?

These materials are resistant to high temperatures and pressure, durable, and chemically resistant. They are also lightweight, easy to install, and environmentally friendly.

How are PPR and PPRCT pipes installed?

The pipes are connected by heating and melting them together, ensuring a strong and durable bond. Specialized welding devices are required for this process.

What does maintenance of PPR and PPRCT pipes involve?

Regularly checking the seals and connections is necessary to prevent leaks. However, due to their high chemical resistance, these pipes require less maintenance than other materials.

How do PPR and PPRCT compare to PVC, CPVC, and copper?

PPR and PPRCT are lighter and easier to handle than copper and more chemically resistant than PVC and CPVC. They offer a longer lifespan and are 100% recyclable.

What standards and certifications must PPR and PPRCT pipes meet?

Key standards include ISO 15874 for PPR and ISO 15874-2 for PPRCT. These standards ensure that the pipes meet performance and safety requirements.

Are PPR and PPRCT pipes environmentally friendly?

Yes, both materials are 100% recyclable, contributing to sustainability. They also have a longer lifespan, reducing the need for frequent replacements.

How long do PPR and PPRCT pipes last?

These pipes have an estimated lifespan of over 50 years, provided they are installed and maintained correctly.

Can PPR and PPRCT pipes be used for drinking water?

Yes, PPR and PPRCT are food-grade and safe for use in drinking water installations.

What temperatures can PPR and PPRCT pipes withstand?

PPR pipes can withstand temperatures up to 70°C, while PPRCT pipes are suitable for temperatures up to 95°C.

How do the costs of PPR and PPRCT pipes compare to other materials?

PPR and PPRCT are often more cost-effective than copper and offer lower long-term maintenance costs than PVC and CPVC.

Are PPR and PPRCT pipes resistant to frost?

Yes, they have a certain flexibility that makes them more resistant to frost damage than some other materials.

What diameters are available for PPR and PPRCT pipes?

There is a wide range of diameters available, from small diameters for household installations to large ones for industrial applications.

How does water quality affect the lifespan of PPR and PPRCT pipes?

Due to their chemical resistance, the lifespan of these pipes is less affected by water quality compared to other materials.

Are there specific storage requirements for PPR and PPRCT pipes?

Yes, they should be protected from direct sunlight and extreme temperatures to ensure their quality and longevity. For pipe systems that are exposed to strong UV radiation, POLYMELT has developed the UV product series, which can withstand even the strongest sunlight.