Hiline FibreFlex - Pre-insulated Reinforced Polymer Pipe System
A high-performance reinforced pre-insulated flexible pipe system for district heating
Hiline FibreFlex cleverly combines a polymer service pipe liner and a high-modulus aramid reinforcing mesh in a composite construction, protected by an oxygen diffusion barrier layer. These introduce the opportunity for improved safety factors, operation at higher temperature/ pressure combinations, extended service life and reduced heat loss.
Service pipe jacket with oxygen barrier
Hiline FibreFlex is a highly-efficient reinforced pre-insulated pipe system that’s perfect for district heating applications at higher pressures than a standard PE-Xa pipe.
- Maximum continuous operating temperature: 80°C
- Maximum temperature (peak): 95°C
- Maximum operating pressure: 10 bar at 80°C
- Thermal conductivity: ≤ 0.0210 W/mK
- Service pipe: cross-linked polyethylene (PE-Xa) reinforced with aramid fibre mesh
- Insulation: PUR (CFC-free) - available in Series 1 and 2 thicknesses
- Outer casing: seamlessly extruded corrugated LDPE
Available in sizes ranging from 25mm up to 160mm (OD), Hiline FibreFlex is supplied on rolls of up to 550 metres in length (25mm OD). Single and double service pipe configurations available within a single outer casing pipe.
The Hiline FibreFlex system has a comprehensive range of fittings and accessories to ensure that it can be adapted to suit all possible configurations – including transitions to pre-insulated pipe systems with different types of service pipe – such as steel.
Greater Thermal Efficiency
With the same internal service pipe dimensions as traditional flexible pre-insulated pipe systems, the reduced wall thickness provides more room for insulation and therefore improved thermal efficiency.
When comparing a standard PE-Xa pipe with Series 1 insulation against a Hiline FibreFlex pipe with Series 1 insulation, tests have revealed a 17% lower heat loss in a FibreFlex system. Over many decades of operation, this will offer significant reductions in operating cost and lower carbon emissions.
Strong and secure fittings
With a fit-and-forget axial compression joint system for service pipe connections and a robust clip-together solution for casing joints, the systems can be configured to meet all site requirements with ease.
Tough outer casing
With a tough corrugated LDPE outer casing, all Hiline Flex pipe systems can be buried directly in the ground and their flexibility allows for on-site obstacles to be easily worked around.
Quality and Standards
The FibreFlex pipe system is certified OFI CERT ZG 200-2 Class A Technical Specification (in line with EN 15632-2).Hiline systems are manufactured in modern, EN ISO 9001-approved production facilities, using quality-assured materials that comply with all relevant design standards and tolerances for district heating and cooling, along with any that are pertinent to special applications.
Delivered to site coiled in continuous lengths of up to 550 metres, on-site joints can be kept to a minimum making installation a quick and secure process.