Pre-insulated pipe FLEXSTAR DUO 25+25x90: Pex-a pipe 25x2.3+25x2.3mm, OD 90mm, 6 bar, 80°C, double, thermal insulation with PUR foam, with corrugated LLDPE outer jacket 1098220

Pre-insulated pipe for efficient heating and district heating installations

The FLEXSTAR DUO pre-insulated pipe is an advanced solution for modern heating and district heating systems, as well as an ideal choice for renovations. This system combines flexibility, energy efficiency and ease of installation, which translates into time and cost savings for both the installer and the end user. Thanks to its twin-pipe design (supply and return in one jacket), the installation process is simplified, minimizing the number of connections required.

The FLEXSTAR DUO pipe consists of an inner pipe made of cross-linked polyethylene PEX with an EVOH anti-diffusion barrier, polyurethane (PUR) insulation and a corrugated outer jacket made of LLDPE polyethylene. This construction provides high resistance to mechanical damage and moisture, and minimizes heat loss during medium transfer. The corrugated surface of the outer jacket increases the flexibility of the pipe, allowing it to be laid even in tight spaces without the need for additional elbows.

Application and benefits:

• Heat pumps: Ideal for heating systems using heat pumps (air-to-water), providing optimal energy efficiency.
• District heating networks: Works well in the construction of local district heating networks, supplying heat to residential and commercial buildings.
• Modernizations and new installations: An excellent choice for both modernizing existing installations and building new heating systems.
• Low thermal conductivity: PUR foam insulation minimizes heat loss, reducing the operating costs of the heating system.
• Flexibility and ease of installation: The corrugated outer jacket makes it easy to lay pipes even in difficult conditions, reducing installation time.
• Durability and reliability: High-quality materials used guarantee long-lasting and trouble-free operation of the system.
• Corrosion resistance: Materials used in the production of the pipe are corrosion resistant, ensuring the longevity of the installation.
• EVOH anti-diffusion barrier: Protects against oxygen penetration into the installation, preventing corrosion of metal components.

Technical specifications:

The FLEXSTAR DUO 25+25/90 DN20 6 bar pipe is characterized by a nominal diameter of DN20 (internal) and an outer diameter of the pre-insulated pipe of 90 mm. The maximum working pressure is 6 bar at a temperature of 90°C. The pipe has an anti-diffusion zone providing protection against oxygen penetration and a minimum bending radius of 0.3 mm, which facilitates laying in tight spaces. The thermal conductivity coefficient of PUR insulation is 0.236 W/(m·K), which provides very good thermal insulation properties. The pipe is made of PE-Xa with a wall thickness of 2.3 mm, and its inner color is black. The standardized dimension ratio (SDR) is 11, which indicates the appropriate mechanical strength of the pipe.