• Hiline Pre-insulated Pipe

    Hiline Pre-insulated Pipe

    The result of many decades of research and development, CPV’s Hiline range of bonded pre-insulated pipe systems offers a safe, secure and efficient means of transporting hot and chilled liquids – whatever the application

    • Choice of service pipes
    • Complete systems
    • Tough outer casing
    • Highly-efficient insulation
  • A Service Pipe for Every Application

    A Service Pipe for Every Application

    Designed to meet the needs of a multitude of applications, the Hiline range is available with a wide selection of service pipes that include:

    • Steel (Metric and Imperial)
    • Rigid Polymers
    • Flexible Polymers
    • Glass-Reinforced Epoxy (GRE)

HILINE PRE-INSULATED PIPE SYSTEMS

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

The result of many decades of research and development, CPV’s Hiline range of bonded pre-insulated pipe systems offers a safe, secure and efficient means of transporting hot and chilled liquids – whatever the application. Proven at countless sites throughout the world, each system has been carefully designed and manufactured to deliver outstanding performance and exceptional levels of reliability.

Efficient Insulation

High-performance bonded PUR insulation provides excellent performance

Rigid Systems

A selection of rigid pre-insulated pipes with choice of service pipe

Flexible Systems

A selection of flexible pre-insulated pipes with choice of service pipe

Complete System

Hiline is available with a comprehensive range of joints, fittings and components to suit every application

Tough Casing

Tough polymer outer casing offers robust defence against the harshest of ground conditions

Electronic Surveillance

Intelligent electronic surveillance available to contstantly monitor the system's integrity

Hiline Stainless

    Flexible Service Pipe Options

    • Hiline FibreFlex

      Hiline FibreFlex

      A flexible and highly efficient pre-insulated reinforced polymer pipe system for district heating applications at higher pressures

      Find out more ...

    • Hiline FibreFlex Pro

      Hiline FibreFlex Pro

      A flexible and highly efficient pre-insulated reinforced polymer pipe system for district heating applications at higher temperatures and pressures

      Find out more ...

    • Hiline Stainless

      Hiline Stainless

      A flexible pre-insulated corrugated stainless steel pipe system for higher temperature and pressure applications

      Find out more ...

    • Hiline Flex

      Hiline Flex

      A flexible pre-insulated PEX pipe system supplied in coiled lengths for district heating applications

      Find out more ...

    Rigid Service Pipe Options

    • Hiline Steel

      Hiline Steel

      A range of rigid and flexible bonded steel pre-insulated pipes for district heating and cooling applications

      Find out more ...

    • Hiline Copper

      Hiline Copper

      A rigid pre-insulated copper pipe system for district heating, cooling and potable water applications

      Find out more ...

    • Hiline GRE

      Hiline GRE

      A Glass Reinforced Epoxy (GRE) pre-insulated pipe system for district heating and cooling applications

      Find out more ...

    • Hiline Aqua (heating)

      Hiline Aqua (heating)

      A rigid pre-insulated polymer pipe system for district heating, cooling and potable water applications

      Find out more ...

    • Hiline Aqua Cool

      Hiline Aqua Cool

      A rigid pre-insulated polymer pipe system for process cooling and chilled water applications

      Find out more ...

    • Custom Options

      Custom Options

      Bespoke pre-insulated pipes with choice of service pipes and casing materials to meet an infinite range of applications

      Find out more ...

    Available Range

    The following table outlines the current range of Hiline pre-insulated pipe systems.

     

    Service Pipe 

     Dia Min

     Dia Max 

    Temperature 

    Hiline Steel Steel (Metric & Imp) 20mm (DN) 1,200mm (DN)  130°C (cont)
    Hiline Copper Table X and Y copper 15mm (OD) 159mm (OD) 110°C (cont)
    Hiline GRE Glass-Reinforced Epoxy (GRE) 32mm (DN) 630mm (DN) 120°C (cont)
    Hiline Aqua Choice of rigid polymer pipes 20mm (OD) 315mm (OD) 95°C (cont) (Typical)
    Hiline Aqua Cool Polyethylene ( PP and ABS available) 20mm (OD) 315mm (OD) down to -40°C
    Hiline Flex  Choice of single, twin or double PE-X-a 25mm (OD) 160mm (OD) 80°C (cont at 6 bar)
    Hiline FibreFlex Reinforced Composite Polymer service pipe 25mm (OD) 160mm (OD) 80°C (cont at 10 bar)
    Hiline FibreFlex Pro Reinforced Composite Polymer service pipe 32mm (OD) 160mm (OD) 95°C (cont at 10 bar)

    Efficient insulation

    Efficient insulation

    • High-efficiency CFC-free, rigid polyurethane foam insulation
    • Different thicknesses available (Series 1, 2 and 3)
    • Available with optional trace or maintained heating cables
    • Mineral wool insulation layer (Hiline Steam system only)
    Tough outer casing

    Tough outer casing

    • High Density Polyethylene (HDPE) casing on standard systems
    • Medium Density Polyethylene (MDPE) casing on flexible systems
    • Barrier-pipe casing available for use in contaminated ground
    • UV-stable, above-ground casing options available
    Strong and secure fittings

    Strong and secure fittings

    • Range of secure joints and fittings available
    • HDPE electro-fusion, mechanical and heat-shrinkable case jointing options 
    Surveillance system

    Surveillance system

    CPV's rigid systems are compatible with a range of surveillance systems for use with steel or copper service pipes. There's a choice of the Nordic pulse, Brandes resistance or HDW systems which must be specified at the time of enquiry.
    Applications

    Applications

    • District heating
    • Hot water supplies
    • Chilled water
    • Steam heating systems
    • Potable water
    • Process fluids
    • Refrigerants
    • Corrosive and hazardous chemicals
    • Temperature-sensitive product lines
    Quality Assured

    Quality Assured

    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 – such as EN 253, along with any that are pertinent to special applications.
    CIBSE/ADE CP1 Heat Networks: Code of Practice for the UK

    CIBSE/ADE CP1 Heat Networks: Code of Practice for the UK

    CPV's Hiline range complies with the requirements of the CIBSE/ADE CP1 Heat Networks: Code of Practice for the UK. Find out more by clicking here.

    logo Hiline FibreFlexPro2 200px

     

     

    A higher-performance reinforced pre-insulated flexible pipe system for higher-temperature district heating applications

    Hiline FibreFlex and FibreFlex Pro are cutting-edge pre-insulated, flexible pipe systems that combine a high-modulus aramid mesh reinforcement with modern polymer materials in a multi-layer pipe construction. This significantly improved structure allows plastic pipes to be used at high operating pressures of up to 16 bar and operating temperatures of up to 115°C peak.

    A Replacement for Steel

    This makes Hiline FibreFlex and FibreFlex Pro ideal alternative, or complimentary, piping solutions to rigid pre-insulated steel pipes commonly found in district heating heat networks. Additionally, they can provide an alternative to conventional pre-insulated PEX pipes offering higher performance and higher factors of safety.

    Composite Construction

    (click on icons to reveal the labels)

    PE-Xa service pipe

    Adhesive layer

    Aramid fibre mesh

    Service pipe jacket with oxygen barrier

    PUR foam insulation

    LDPE outer casing

    • PE-Xa service pipe

    • Adhesive layer

    • Aramid fibre mesh

    • Service pipe jacket with oxygen barrier

    • PUR foam insulation

    • LDPE outer casing

      Overview

      Hiline FibreFlex Pro is a highly-efficient reinforced pre-insulated pipe system that’s perfect for district heating applications at higher pressures and temperatures than FibreFlex or standard PE-Xa pipe.

      • Maximum continuous operating temperature (30 years): 95°C
      • Maximum temperature (peak): 115°C
      • Maximum operating pressure (30 years): 10/16 bar at 95°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  32mm 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.

      Complete System

      Complete System

      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

      Greater Thermal Efficiency

      Both FibreFlex and FibreFlex Pro pipes are insulated in one continuous manufacturing process using a CFC-free bonded polyurethane foam with an outstanding thermal conductivity value of l≤0.021 W/mK at 50°C.

      As the insulation layer has a lower thermal conductivity than conventional pre- insulated steel pipes (l=0.07 W/mK), in diameters up to 80 mm, the FibreFlex Pro system's heat loss is lower than insulation series S3 pipes and in larger diameters, heat loss is lower than series S2 pipes (see graph).

      When compared to conventional, bonded preinsulated PE-Xa pipes, the heat loss can be up to 17% lower for the FibreFlex system and even better when compared to non-bonded pipes.
      Applications

      Applications

      Available in service pipe diameters from DN20 to DN129mm, FibreFlex and FibreFlex Pro are ideal solutions for:
      • Biomass district heating networks
      • High-temperature city heat networks
      • High-pressure heating networks supplying high buildings
      • High-pressure heating networks in hilly areas
      • Special applications at operating temperatures up to 115°C and pressures up to 10 bar
      On-Site Flexibility

      On-Site Flexibility

      The reduced pipe wall thickness makes both systems more flexible to install, significantly increasing their range of application in district heating systems. In addition this includes a full range of fittings and accessories to meet the design requirements of all district heating pipeline projects.
      Strong and secure fittings

      Strong and secure fittings

      FibreFlex and FibreFlex Pro systems are quick and easy to join using specially designed compression fittings, incorporating a unique polymer sleeve, which is inserted between the fitting’s outer sleeve and the service pipe.

      A steel insert is then easily fitted inside the pipe, without the need for the pipe end to be expanded. This provides a robust connection with maximum joint integrity.
      Quality and Standards

      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.
      Saving Time and Money

      Saving Time and Money

      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.

      Project Example
      In a project where a heat network of 1,400m of FibreFlex piping was installed, it could be demonstrated that when compared to installing the same network in pre-insulated steel, there was an installed cost saving and a significant reduction in the network installation time (see graph).

      A pre-insulated rigid steel pipe system for district heating, cooling and special applications

      Hiline logo 300px

      A rigid, bonded pre-insulated steel pipe system in accordance with EN253. Suitable for district heating, cooling and special applications and temperatures up to 130°C continuous. Available in metric and imperial sizes – from 20mm to 1200mm NB, supplied in 6 and 12 metre lengths with an optional Steel Flex system on rolls.

      Applications

      The list of applications that are suitable for  Hiline Steel is vast, but typically, it is used above and below-ground, on domestic, commercial and industrial sites for conveying:

      •  District heating
      •  Chilled water
      •  Process Fluids
      •  Refrigerants

      Manufacture and Standards

      Hiline Steel (Metric) pre-insulated pipes and fittings for thermal utilities are manufactured within an ISO 9001 accredited environment in accordance with EN 253, EN 448, EN 488, EN 489, EN 13941

      Hiline Steel (Imperial) pre-insulated pipes and fittings for thermal utilities are manufactured within an ISO 9001 accredited environment generally in accordance with EN 253, EN 448, EN 488, EN 489

      Hiline Steel Flexible (Metric) pre-insulated pipes and accessories for thermal utilities are manufactured within an ISO 9001 accredited environment in accordance with EN 15632-4

      Service Pipes

      Metric System:

      Seamless Pipe
      Certified seamless steel pipe manufactured in accordance with EN 10216-2 Grade P235 GH, EN 10216-1/A1 Grade P235 TR1 & P235 TR2, DIN 1629 Grade St 37.0

      Seamed Pipe (Welded)
      Certified seamed (welded) steel pipe manufactured in accordance with EN 10217-2/A1 Grade P235 GH, EN 10217-5/A2 Grade P235 GH, EN 10217-1 Grade P235 TR1 or P235 TR2, DIN 1626 Grade St 37.0

      Imperial System:

      Seamless Pipe
      Certified seamless carbon steel pipe manufactured in accordance with EN 10217-1:API5L Grade B/X42 Schedule 20 or Schedule 40 & EN 10217-1:ASTM A106 Grade B Schedule 20 or Schedule 40.

      Seamed Pipe (Welded)
      Certified welded carbon steel pipe manufactured in accordance with EN 10217-1:EN 10255 Grade S195T Heavy gauge or Medium gauge (formerly BS1387) & EN 10217-1:API5L Grade B/X42 Schedule 20 or Schedule 40. 

      Efficient Insulation

      A key component in the efficiency of the Hiline pipe systems is our choice of CFC-free polyurethane foam to provide excellent levels of insulation – in accordance with the demands of the EN 253 standard. Using cyclopentane as the blowing agent, we achieve very-low lambda levels – which result in much-reduced energy losses to the media being conveyed by the service pipe.
      The effects of using a more efficient insulation don’t appear to be much at face value, but factor in a 30-year life-cycle cost of operating the system and the savings – both financial and environmental – mount up significantly. When looking at the life-cycle-costs of a district heating pipe network, the initial capital investment is typically around ten percent – with the biggest cost being the on-going operation (see foot of page).

      •  High-efficiency CFC-free, rigid polyurethane foam insulation
      •  Different thicknesses available (Series 1, 2 and 3)
      •  Available with optional trace or maintained heating cables

      RHI Compliance

      Hiline Steel pipe systems are deemed 'Properly Insulated' by the Renewable Heat Incentive (RHI) and therefore meet their strict requirements.

      Casing Pipes

      Casing pipe is manufactured in accordance with standard EN 253 from high density polyethylene (HDPE)

      Properties

      •  Density 950 kg/m³
      •  Upper yield stress 19 MPa
      •  Elongation at break at least 350%
      •  Expected life at least 50 years


      HDPE casing is also available with additional UV stabiliser offering greater protection against direct sunlight for
      above ground installations

      Quality Assured

      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 – such as EN 253, along with any that are pertinent to special applications.

      Surveillance System

      When installing Hiline Steel systems, it is recommended that an electronic surveillance system is included in order to constantly monitor the insulation for the ingress of moisture. This provides peace of mind that should the outer casing be damaged by future street works, the presence of groundwater in the insulation can be picked up, located and repaired before any damage is caused to the service pipe. We offer full support for the main types of surveillance technologies, including the Nordic, Brandes and HDW systems.

      Tough Outer Casing

      • High Density Polyethylene (HDPE) casing on standard systems
      • Barrier-pipe casing available for use in contaminated ground
      • UV-stable, above-ground casing options available

      Strong and secure fittings

      • Range of secure joints and fittings available
      • HDPE electro-fusion and heat-shrinkable case jointing options 

      A pre-insulated pipe system for district heating, cooling and potable water applications

       

      Hiline Aqua Logo 50pxH

      Hiline Aqua is a rigid, pre-insulated polymer pipe system specifically developed for the next generation of district heating, cooling and hot water service networks. Whether it’s for a simple connection between two buildings or a large-scale network, it offers outstanding thermal performance coupled with exceptional levels of reliability.

      Hiline aqua dimensioned 800

       

      Available Dimensions

      6m and 12m lengths

      TYPE

      Service Pipe

      Series 1
      Insulation

      AQUA HEATING
      Service Pipe

      AQUA PLUS
      Heating and Hot Water Services (WRAS approved)
      Service Pipe

        OD Casing ID Wall Volume ID Wall Volume
        d D   s Service pipe   s Service pipe
        mm mm mm mm l/m mm mm l/m

      20/90

      20

      90

      14.4

      2.8

      0.163

      -

      -

      -

      25/90

      25

      90

      18.0

      3.5

      0.254

      -

      -

      -

      32/90

      32

      90

      26.2

      2.9

      0.539

      24.8

      3.6

      0.483

      40/110

      40

      110

      32.6

      3.7

      0.834

      31.0

      4.5

      0.745

      50/110

      50

      110

      40.8

      4.6

      1.307

      38.8

      5.6

      1.182

      63/125

      63

      125

      51.4

      5.8

      2.074

      48.8

      7.1

      1.869

      75/140

      75

      140

      61.4

      6.8

      2.959

      58.2

      8.4

      2.659

      90/160

      90

      160

      73.6

      8.2

      4.252

      69.8

      10.1

      3.825

      110/200

      110

      200

      90.0

      10.0

      6.359

      85.4

      12.3

      5.725

      125/200

      125

      200

      102.2

      11.4

      8.199

      97.0

      14.0

      7.386

      160/250

      160

      250

      130.8

      14.6

      13.430

      124.2

      17.9

      12.109

      200/315

      200

      315

      163.6

      18.2

      21.010

      155.2

      22.4

      18.908

      250/355

      250

      355

      204.6

      22.7

      32.861

      194.2

      27.9

      29.605

      315/400

      315

      400

      257.8

      28.6

      52.172

      244.6

      35.2

      46.966

      Polypropylene (PP) Service Pipe

      A polymer composite pipe manufactured from three-layer polypropylene random copolymer (PP-R), mechanically strengthened by fibre to dimensions and tolerances as specified in DIN 8077 Type 2 (PP-B) and quality standards and testing regime to DIN 8078 Type 2 (PP-B).

      Intended for heating and cooling networks operating between -20°C and 95°C and with a WRAS-approved service pipe option for hot potable water services.

      Tough Outer Casing

      Manufactured in HDPE to the requirements of the EN253 standards, the tough and resilient outer casing enables the pipe to be buried directly in the ground – so ensuring the network’s insulation integrity is maintained throughout its service life.

      High-Performance Insulation

      A layer of CFC-free rigid polyurethane foam provides outstanding insulation properties, with values of 0.022 W/mK and with the insulation thickness according to the Series 1 requirements of EN 253. With the service pipe and outer casing being bonded together by the foam insulation, the system far out-performs other systems with an air gap. With this increased efficiency, comes lower heat loss and therefore a saving in both operational costs and carbon emissions.

      For even greater efficiency, Hiline Aqua pipe systems are also available with increased insulation thickness to series 2 and series 3.

      Complete System

      Hiline Aqua has a comprehensive range of pre-fabricated bends, tees, fittings and accessories that enable it to be adapted to meet all possible configurations – including transitions to other types of pre-insulated pipe systems – such as Hiline Steel or Hiline Flex. Hiline Aqua can be offered as off-site pre-fabricated fittings and spool assemblies to meet a client’s bespoke requirements – significantly reducing installation time and cost.

      Robust and Adaptable Joints

      The Hiline Aqua PP-R service pipe is perfect for thermoplastic welding techniques, including electro fusion, butt fusion and socket fusion.

      The HDPE outer casing can be joined using the proven Hiline range of wrap-around heat-shrink or electro-fusion couplings to ensure the very tightest of joints to protect against the ingress of ground water.

      Trace Heating and Leak Detection Options

      All of the Hiline Aqua range is available with the option of integrated trace heating cables to protect the media temperate and leak detection systems that warn of moisture ingress into the insulation.

      Standards

      Hiline Aqua pre-insulated pipes and fittings for thermal utilities are manufactured within an ISO 9001 accredited environment, generally in accordance with the requirements of EN 253 and in compliance with EN 448, EN 488, EN 489 and EN 13941

      Service Life

       

      Temperature

      Service Life

      Permissible working pressure

      AQUA

      AQUA PLUS

      bar

      psi

      bar

      psi

      10°C

      1

      27.8

      (403)

      28.8

      (418)

      5

      26.2

      (380)

      27.9

      (405)

      10

      25.6

      (372)

      27.5

      (399)

      25

      24.7

      (358)

      27.1

      (393)

      50

      24.1

      (350)

      26.7

      (387)

      15°C

      1

      25.7

      (373)

      26.9

      (390)

      5

      24.2

      (351)

      26.0

      (377)

      10

      23.6

      (343)

      25.7

      (373)

      25

      22.8

      (331)

      25.2

      (366)

      50

      22.2

      (322)

      24.9

      (361)

      20°C

      1

      23.8

      (345)

      25.0

      (363)

      5

      22.3

      (324)

      24.2

      (351)

      10

      21.7

      (315)

      23.9

      (347)

      25

      21.0

      (305)

      23.5

      (341)

      50

      20.4

      (296)

      23.1

      (335)

      30°C

      1

      20.2

      (293)

      21.7

      (315)

      5

      18.9

      (274)

      20.9

      (303)

      10

      18.4

      (267)

      20.6

      (299)

      25

      17.8

      (258)

      20.2

      (293)

      50

      17.3

      (251)

      19.9

      (289)

      40°C

      1

      17.1

      (248)

      18.6

      (270)

      5

      16.0

      (232)

      18.0

      (261)

      10

      15.6

      (226)

      17.7

      (257)

      25

      15.0

      (218)

      17.3

      (251)

      50

      14.6

      (212)

      17.1

      (248)

      50°C

      1

      14.5

      (210)

      15.9

      (231)

      5

      13.5

      (196)

      15.3

      (222)

      10

      13.1

      (190)

      15.1

      (219)

      25

      12.6

      (183)

      14.7

      (213)

      50

      12.2

      (177)

      14.5

      (210)

      60°C

      1

      12.2

      (177)

      13.5

      (196)

      5

      11.4

      (165)

      13.0

      (189)

      10

      11.0

      (160)

      12.7

      (184)

      25

      10.6

      (154)

      12.4

      (180)

      50

      10.3

      (149)

      12.2

      (177)

      70°C

      1

      10.3

      (149)

      11.3

      (164)

      5

      9.6

      (139)

      10.9

      (158)

      10

      9.2

      (134)

      10.7

      (155)

      25

      8.0

      (116)

      10.4

      (151)

      50

      6.8

      (99)

      10.2

      (148)

      75°C

      1

      9.4

      (136)

      10.4

      (151)

      5

      8.7

      (126)

      9.9

      (144)

      10

      8.0

      (116)

      9.7

      (141)

      25

      6.4

      (93)

      9.5

      (138)

      50

      5.4

      (78)

      9.3

      (135)

      80°C

      1

      8.6

      (125)

      9.5

      (138)

      5

      7.7

      (112)

      9.0

      (131)

      10

      6.5

      (94)

      8.9

      (129)

      25

      5.2

      (75)

      8.6

      (125)

      90°C

      1

      7.2

      (104)

      7.8

      (113)

      5

      5.1

      (74)

      7.4

      (107)

      10

      4.3

      (62)

      7.3

      (106)

      logo Hiline eFlex 200px

       

       

      A high-performance pre-insulated flexible pipe system for district heating and cooling applications.

      Suitable for temperatures up to 95°C and a maximum working pressure of 6 bar, the pipes are available in sizes ranging from  25mm up to 160mm (OD), supplied on rolls of up to 800 metres in length (20mm OD). Available with single and double service pipe configurations within a single outer casing pipe.

      Applications

      The list of applications that are suitable for  Hiline e-Flex is vast, but typically, it is used above and below-ground, on domestic, commercial and industrial sites for conveying:

      •  District Heating
      •  Chilled Water
      •  Potable Water (optional)
      •  Hot Water (optional)

      Manufacture and Standards

      Pre-insulated pipes and fittings for thermal utilities are manufactured within an ISO 9001 accredited environment in accordance with EN 15632 Parts 1 and 2.

      Service Pipes 

      Cross-linked polyethylene (PE-Xa) in accordance with DIN 16892/93 with an oxygen diffusion barrier (EVOH) in accordance with DIN 4726.Hiline Flex Uno 2449 400x267c

      Efficient Insulation

      A key component in the efficiency of the Hiline pipe systems is our choice of CFC-free polyurethane foam to provide excellent levels of insulation – in accordance with the demands of the EN 253 standard. Using cyclopentane as the blowing agent, we achieve very-low lambda levels – which result in much-reduced energy losses to the media being conveyed by the service pipe. The effects of using a more efficient insulation don’t appear to be much at face value, but factor in a 30-year life-cycle cost of operating the system and the savings – both financial and environmental – mount up significantly. When looking at the life-cycle-costs of a district heating pipe network, the initial capital investment is typically around ten percent – with the biggest cost being the on-going operation.

      •  High-efficiency CFC-free, rigid polyurethane foam insulation

      RHI Compliance

      Hiline Flex pipe systems are deemed 'Properly Insulated' by the Renewable Heat Incentive (RHI) and therefore meet their strict requirements.

      Outer Casing Pipe

      The outer casing pipe is manufactured from seamlessly extruded, corrugated polyethylene (PE-LLD).

      HilineFlex OpenClipShell Straight 2484 300x200

      Site Jointing Techniques

      Service Pipes

      The jointing of PEX pre-insulated pipes can be carried out using the proven PEX-LOK compression-sleeve jointing system - giving a maintenance free, tight fitting joint.

       


      Casing pipes

      The sealing of casing pipes in the field are carried out with a mechanical, shroud jointing system that enables the easy installation of foam insulation in the joint area. 

      Quality Assured

      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 – such as EN 253, along with any that are pertinent to special applications. 

      Additional Services

      Pipe Coil Trailer HirePipe coil interior CMYK 7042 400x266

      Pipe coils can be delivered to site on a specially-designed pipe coil trailer. These trailers, supplied on a rental basis, enables safe uncoiling and swift installation of Hiline e-Flex pipes straight into pre-prepared trenches. 
      Flexible polymer-based pipe systems delivered to site in coils, albeit easier to install than steel systems, can be challenging to safely handle and in using Hiline Flex pipe coil trailers, the process is made much more simple and can reduce the number of operatives required on site. Please contact us for prices and availability.

      Pipe Termination Pre-Fitting Service IMG 6937 PrepOfPipeEnds 400x267

      For clients looking to perhaps link just two buildings, we now offer the choice of a factory-fitted heat shrink end cap and pre-fitted PEX-LOK axial compression termination connector with either a BSP thread or steel weld adaptor. Cutting down installation time and reducing the need to hire specialist tools, the pre-fitting service is available on coils of Hiline e-Flex with PEX service pipes diameters up to 63mm OD (DN 51.4mm).

      Please ask our sales team for details of this service when making an enquiry or placing an order.

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      World-Class Support

      At CPV we pride ourselves by the way in which we support our customers – from the moment that they first contact us through to their long-term operation and maintenance of a pre-insulated pipe network. 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.

      Design and Stress Analysis

      designing district heating systems 400x167There are many factors that will affect the long-term integrity of a pre-insulated pipe system. Correctly identifying and dealing with the potential for thermal expansion of the pipe system is a critical element of the design process and we employ state-of-the-art sisKMR specialist stress analysis software. This package allows us to configure the pipe routes to keep the thermal expansion within safe limits and conform to the requirements of the EN 13941 standard for Design and installation of pre-insulated bonded pipe systems for district heating. Please click this link to find out more about our advanced stress analysis service for district heating pipe networks.

      Training

      Training installers, supervisors and maintenance operatives, our brand new training centre allows for not only the theory, but hands-on practical experience in the correct method for installing the Hiline pipe systems. In addition to this, we also offer training courses in the design, installation, commissioning and maintenance of electronic surveillance systems – including the use of our own buried pipe network, on which we can simulate moisture faults as part of the practical training.

      Tool sales and hire

      We offer both the sale and short-term hire of all the specialist tools required to install the Hiline pipe system.

      Trace and Maintained Heating Systems Support

      In temperature-critical, special applications that require round-the-clock maintenance of a specific media temperature, we can supply the Hiline pipe system with Trace or Maintained Heating systems.

      On-site support services

      Whether it’s on-site training, site supervision or specialist advice, support and maintenance – our engineers are at hand to provide customer support as and when required.

      Hiline Project References

      • Academy Central Residential Developments
      • Arup Campus, Solihull, Birmingham
      • Ashley Park Housing Association
      • Astley Ainslie Hospital
      • British Antartic Survey
      • Calendar Park, Scotland
      • Camelford Primary School
      • CEU University, Leeds
      • Edgbaston Priory Club
      • Falkland Islands
      • Government Facilities
      • Lancaster University, New Sports Centre
      • Leicester Citywide DH Network
      • Northwood Barracks, London
      • Rolls Royce, Derby
      • Shenley Wood Retirement Village
      • Swansea University
      • The British Embassy, Harare, Zimbabwe
      • Warwick University
      • York University Accommodation Block

      The True Cost of Insulation

      The effects of using a more efficient insulation don’t appear to be much at face value, but factor in a minimum 30-year life-cycle cost of operating the system and the savings – both financial and environmental – mount up significantly. The Hiline range of pre-insulated pipe systems are available with increased levels of insulation thickness – which for a relatively small additional investment at the time of installation – will yield significant savings during the lifetime of the system.

      To illustrate this point, take an example scenario in which a 5,000-metre long network (flow and return) consisting of DN150mm steel pre-insulated pipes circulating hot water at a flow temperature of 100°C. If fuelled by a natural-gas-fired boiler, constantly operating all-year-round, the system with standard insulation – over its nominal 30-year life – will lose heat to the equivalent of around £3.65 million’s-worth of gas(*) and emit 15,250 tonnes of CO2.

      By making a small additional investment – equivalent to around 10 percent of the material cost at the time of installation – in order to upgrade the Hiline pipe system’s insulation thickness to Series Two, the cost of the heat lost would be reduced by some £1.2million – also saving 5,091 tonnes of CO2 from being emitted. The graph shown demonstrate the effects that this can have.

      Figure 1

      (*)Basis of Calculations used for example costs:

      - Gas supply tariff 3p/ kWh
      - Gas costs increase by 2.5% per annum for the 30-year calculation
      - Gas boiler efficiency 80%
      - Carbon factor for natural gas = 0.1836 kgCO2/kWh (source: Ofgem)