Pex-Flex, CU-Flex and Steel-Flex pipes, combined with a complete range of fittings and joints create flexible, pre-insulated pipe systems. These systems are mainly used as service pipes in the district heating sector but can also be used in many other applications.

Pex-Flex has a PEX carrier pipe, intended for temperatures up to 203 °F (95 °C) and an operating pressure of 87 to 145 psi (6-10 bar) depending on the operating temperature. The PEX carrier pipe also features an oxygen diffusion barrier.

Cu-Flex has a carrier pipe made of soft annealed copper, intended for temperatures up to 266°F (130°C) and a maximum operating pressure of 232 psi (16 bar). Steel-Flex has a carrier pipe made of steel, intended for temperatures up to 266°F (130°C) and a maximum operating pressure up to 362 psi (25 bar).

The advantage of using the Pex-Flex system is its remarkable low thermal conductivity. The polyurethane insulation is better
than other insulations, resulting in low heat losses and small outer jacket diameters.

• Reduction in the number of joints needed through the availability of long lengths
• Reduction in the number of bends/fittings needed as the flexibility allows the piping to follow the best and easiest path (see minimum bending radius table on page 6).
• Reduction of waste as pipe can be cut to measure
• No special considerations necessary to take up thermal expansion
• Reduction of excavation costs as pipes can be laid on top of each other and/or in very narrow trenches
• No-dig methods (or boring) can be applied
• Polyurethane-cyclopentane foam with a lambda-value of 0,16 (0.023 W/m K) measured at 122°F (50°C) is the most
efficient insulation available.