Skip to main content

District Heating & Cooling Networks

A range of pre-insulated pipe systems for district heating, cooling and special applications

Preparing for a Net Zero Future

Heat networks are vital to making net zero a reality in the UK. Offering the flexibility to utilise a wide range of heat sources, they are set to play a leading role as we transition to a sustainable energy landscape.

CPV is supporting this drive to decarbonise heat by its ongoing research and development. Having been at the forefront of the design and development of specialist pipe systems CPV’s Hiline range is no exception. Not content with merely accepting current industry best practice, the company is constantly looking into ways in which it can improve a system’s performance, life expectancy and capital and operating costs.

This approach has resulted in the development of CPV’s next generation of pre-insulated pipe systems to meet the challenge of decarbonising heat. 

Heat sources and flow temperatures are evolving

With the drive to decarbonisation and changes in the way that new buildings operate, temperatures in heat networks are dropping. Whilst Hiline caters for all types of systems, we are evolving our pipe solutions to ensure maximum benefits to both the installation and operation.

Manufactured and stocked in the UK

CPV is proud to be the UK’s longest-serving manufacturer of pre-insulated pipe systems for heating and cooling networks. Over four decades of experience have defined the company’s current Hiline range of solutions that are being used on heat networks far and wide. With its comprehensive choice of service pipe options, the company has developed an enviable range that is backed up by world-class service and support.

Over 40 Years of UK Pre-Insulated Pipe Production

2023 marked forty years since we started manufacturing pre-insulated pipe systems for heating and cooling networks in the UK.  Being one of the pioneers of polymer pipe extrusion in the late 1940s when the company was founded, the production of pre-insulated pipe was an obvious addition to the business and helped satisfy a growing demand for heat networks at that time.  

CPV Ltd celebrates forty years producing preinsulated pipe in the UK

Training and Support

As manufacturer, it’s important to us to ensure that our systems deliver exceptional performance throughout their working life. Therefore, we have established an array of world-class support services that help our clients every step of the way.

CPD Programme

CPV Ltd is CIBSE-accredited provider of CPD courses for Pre-insulated Heat Network Design and Specification

Electronic Surveillance Systems

We offer full a range of systems and supporting services for the main types of surveillance technologies, including the Nordic, Brandes and HDW systems.

CarboSeal Relining System

We are the UK representatives of the innovative CarboSeal relining system for buried heat networks. This enables failing networks to be repaired without the need to excavate the entire sections of pipe.

The Hiline Range

The table below summarises the range of service pipe options within Hiline. We are also able to create bespoke pre-insulated pipe systems that can satisfy applications way beyond heating and cooling networks - such as those for industrial processes and critical infrastructure.  Please contact our sales team should you wish to discuss bespoke requirements.

 
Size Range
(mm)
UNO
DN20 to DN250
DUO
DN20 to DN100
UNO
DN20 to DN150
DUO
DN20 to DN65
UNO
DN20 to DN150
DUO
DN20 to DN65
UNO
DN20 to DN100
DUO
DN20 to DN65
UNO
DN40 to DN600
DUO
DN40 to DN200
UNO
DN20 to DN600
DUO
DN20 to DN250
UNO
DN15 to DN150
DUO
DN15 to DN100
System Standards (*) (*) EN 253
EN 15874
EN 15494
Technical Specification OFI CERT ZG 200-2 Class A Technical Specification OFI CERT ZG 200-2 Class A EN 15632 (*) EN 253 EN 253, EN 448, EN 488, EN 489, EN 13941 & EN 14419 (*) EN 253
Service Pipe Standards DIN 8077DIN 8078 None applicable as it has a unique compositeconstruction None applicable as it has a unique composite construction EN 12318-2 DIN 16892 DIN 16893 ISO 14692-1/2/3/4 ASTM D2310 ASTM D2996 Seamless EN 10216-2 Welded EN 10217-2 & 5 EN 1057
Service Pipe Material & Grade PP-R & PP-RCT Multi-layer composite fibre reinforced PE-Xa with oxygen diffusion barrier and aramid fibre reinforcement mesh PE-Xa with oxygen diffusion barrier and aramid fibre reinforcement mesh PE-Xa with oxygen diffusion barrier GRE ASTM D2310-11FX1 & ASTM D2996 STEEL St 37.0 Seamless R-35, P235 GH Welded P235 GH, P235 TR1 & TR2 COPPER Cu-DHP, R250 & R290
Casing Pipe Material HDPE and MDPE Barrier Corrugated LDPE Corrugated LDPE Corrugated LDPE HDPE **HDPE and Metallic Spiral HDPE and MDPE Barrier
Max Operating Pressure (bar) 10 10 10 6 16 25 10
Max Cont Operating Temp (ºC) 80 80 95 80 95 140 110
Max Peak Operating Temp (ºC) 95 95 115 95 120 152 140
Insulation Material PUR PUR PUR PUR PUR PUR PUR
Insulation Series 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1,2 & 3 1 & 2
Insulation Value (w/mK) 0.027 0.021 0.027 0.021 0.021 Up to 0.0231 0.024
Delivered Lengths 6m & 12m Up to 570m (coil) Up to 570m (coil) Up to 770m (coil) 9m & 11.9m 6m & 12m 6m
Electronic Surveillance YES YES YES YES YES YES YES
  Clover FibreFlex FibreFlex Pro eFlex GRE Steel Copper
Size Range
(mm)
UNO
DN20 to DN250
DUO
DN20 to DN100
UNO
DN20 to DN150
DUO
DN20 to DN65
UNO
DN20 to DN150
DUO
DN20 to DN65
UNO
DN20 to DN100
DUO
DN20 to DN65
UNO
DN40 to DN600
DUO
DN40 to DN200
UNO
DN20 to DN600
DUO
DN20 to DN250
UNO
DN15 to DN150
DUO
DN15 to DN100
System Standards (*) (*) EN 253
EN 15874
EN 15494
Technical Specification OFI CERT ZG 200-2 Class A Technical Specification OFI CERT ZG 200-2 Class A EN 15632 (*) EN 253 EN 253, EN 448, EN 488, EN 489, EN 13941 & EN 14419 (*) EN 253
Service Pipe Standards DIN 8077DIN 8078 None applicable as it has a unique compositeconstruction None applicable as it has a unique composite construction EN 12318-2 DIN 16892 DIN 16893 ISO 14692-1/2/3/4 ASTM D2310 ASTM D2996 Seamless EN 10216-2 Welded EN 10217-2 & 5 EN 1057
Service Pipe Material & Grade PP-R & PP-RCT Multi-layer composite fibre reinforced PE-Xa with oxygen diffusion barrier and aramid fibre reinforcement mesh PE-Xa with oxygen diffusion barrier and aramid fibre reinforcement mesh PE-Xa with oxygen diffusion barrier GRE ASTM D2310-11FX1 & ASTM D2996 STEEL St 37.0 Seamless R-35, P235 GH Welded P235 GH, P235 TR1 & TR2 COPPER Cu-DHP, R250 & R290
Casing Pipe Material HDPE and MDPE Barrier Corrugated LDPE Corrugated LDPE Corrugated LDPE HDPE **HDPE and Metallic Spiral HDPE and MDPE Barrier
Max Operating Pressure (bar) 10 10 10 6 16 25 10
Max Cont Operating Temp (ºC) 80 80 95 80 95 140 110
Max Peak Operating Temp (ºC) 95 95 115 95 120 152 140
Insulation Material PUR PUR PUR PUR PUR PUR PUR
Insulation Series 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1,2 & 3 1 & 2
Insulation Value (w/mK) 0.027 0.021 0.027 0.021 0.021 Up to 0.0231 0.024
Delivered Lengths 6m & 12m Up to 570m (coil) Up to 570m (coil) Up to 770m (coil) 9m & 11.9m 6m & 12m 6m
Electronic Surveillance YES YES YES YES YES YES YES

Off-site fabrication and insulation service

We are able to offer a comprehensive, off-site pre-fabrication service for special pre-insulated pipe sections for heating and cooling networks.

Complementing the Hiline range of pre-insulated pipe systems, we offer what is effectively an ‘emergency service’ for on-site installers of heat networks.

Installers have the option for us to fully pre-fabricate pre-insulated spool pieces in our Hampshire production facility, or for them to fabricate the service pipe themselves on site and send it to us to insulate with bonded polyurethane foam, tough HDPE/LDPE casings and, where required, alarm wires.

This service is proving to be very popular with our clients – particularly when they encounter hidden obstructions underground, such as utilities. Rather than wait for an overseas manufacturer to produce and ship a pre-fabricated spool piece to them – with all the delays that can entail – our clients enjoy access our fast-turnaround service and get their project back on track within a few days. Which when a trench is open and potentially involving a road closure, every hour counts.

This is available for all systems in the Hiline range, covering all choices of service pipe, whether that be steels, copper, polymers or composites.

CPV Ltd celebrates forty years producing preinsulated pipe in the UK

Product Catalogues

Hiline Range Brochure