ABOUT

THIS IS WEHOLITE

Experience and expertise, providing unlimited possibilities

The technology of Weholite was developed already in 1983 and since then it has provided great value to the global pipe market. All solutions are 100 % customizable. With more than 30 years of experience and great engineering skills, we can provide unique pipe solution opportunities all around the world.

Weholite is a well proven durable system that is built to last for more than 100 years. It provides many benefits for the designer, contractor as well as the end-user. Whatever challenge you have, it is hard to imagine how a pipeline could be built easier and more economic.

The Weholite Polyethylene (PE) or Polypropylene (PP) pipe is a spirally wound structured-wall pipe, which makes it very light weight. The product is designed for non- or low pressure applications such as sewage, drainage, storm water, road culverts and retention tank systems in diameters currently available up to DN/ID 3500 mm.

We ensure you a system with best possible safety margins. You can trust that Weholite stands the most difficult handling, installation and ground conditions.

100% customizable

Thanks to the unique technology, Weholite can be designed for any kind of purposes. Pipes are available in diameters up to ID 3500 mm with ring stiffness classes ranging up to 8 kN/m². The pipe length is mainly depending on logistics, but usually the maximum is 30 meters. Most solutions are made for non-pressure applications, but also for low pressure applications with an internal pressure up to 2 bar. A great combination of pipes and panels enables us to build different prefabricated tailor-made products. Tanks, chambers and complete pumping stations are some examples.

Durable, with excellent resistance to chemicals and corrosion

Weholite HDPE pipe will not corrode, tuberculate or support biological growth, making it the material of choice in wastewater and harsh chemical environments. It is inert to salt water and the chemicals likely to be present in sanitary sewage effluent. Like all HDPE pipe, Weholite has a smooth ID that maintains its flow capability over time. The low Manning’s roughness factor of 0.01 remains constant, even after years of use.

Quick and cost efficient installation, unique opportunities for ballasting

Thanks to unlimited pipe lengths and prefabricated products we enable a very quick and efficient installation at the construction site. This is also shown by the several references, where our customers saved weeks of installation time by choosing a smart Weholite solution.

Weholite offers also unique opportunities for ballasting. Traditional plastic pipes with a solid wall construction are normally ballasted against buoyancy with external concrete weights. This is also possible with Weholite. However it is recommended to utilize the pipe wall construction: filling the profile space with concrete mortar. This method saves dredging costs, as the pipe wall ballasting procedure enables a narrower trench than external ballasting alternatives.

Best possible safety margins

Each Weholite pipe is tested to make sure it fulfils the agreed requirements. Herewith, we can ensure a system with the best possible safety margins. The pipe construction is flexible, which provides good safety margins also during installation. A 100 % tight solution will be ensured by welding the pipes together. You can rely on Weholite and be confident that it stands even the most difficult handling, installation, ground conditions and use.

Low carbon footprint

Sustainability has always been a big focus within the development of Weholite. The modern technology provides an optimized solution for different purposes. Moreover, the material used is 100 % recyclable.

The transportation of light weight products has a lower impact on the environment. Also the efficient installation of a pipe with long length reduces heavily the carbon footprint. One of our customers, Skanska, calculated that they reduced the carbon dioxide with 10 tons by using Weholite instead of a concrete pipe solution for a storm water application, installed 2009 in the south of Sweden.

GREAT BENEFITS

Weholite makes it possible

  • 100% customizable up to dim 3500 mm, ring stiffness classes ranging up to 8 kN/m²
  • Durable, with excellent resistance to chemicals and corrosion
  • Quick and cost efficient installation, with unique opportunities for ballasting
  • Best possible safety margins
  • Low carbon footprint

 


Benefits of the designer

  • Fit for purpose, 100 % customizable
  • A safe and reliable solution
  • A comprehensive product range

Benefits of the contractor

  • Easy to handle, even in long lengths
  • Quick and efficient installation

Benefits of the end-user

  • Durable and long-lasting solution
  • Easy maintenance
  • Low carbon footprint

What other material can accomplish the same, especially with the properties that come with the pipe material itself? Weholite is an over-all economical choice.

PRODUCTS

Pipelines

Pipelines

Weholite is a patented structured-wall pipe construction with smooth inner and outer layer, manufactured by spiral wounding of PE- or PP-profiles. Most pipes are made for non-pressure applications, but these are also used for low pressure applications with an internal pressure up to 2 bar. The system is currently available up to DN/ID 3500 mm.

  • Pipelines
  • Pipelines
  • Pipelines

Durable, with excellent resistance to chemicals and corrosion

Weholite HDPE pipe will not corrode, tuberculate or support biological growth, making it the material of choice in wastewater and harsh chemical environments. It is inert to salt water and the chemicals likely to be present in sanitary sewage effluent. Like all HDPE pipe, Weholite has a smooth ID that maintains its flow capability over time. The low Manning’s roughness factor of 0.01 remains constant, even after years of use.

For any kind of use

Weholite pipes stand the most difficult handling and installation conditions. The quality is well proven for marine installation, above ground installation and underground installation with many areas of use:

  • Infra tunnels
  • Sewer
  • Storm water
  • Potable water
  • Ventilation
  • Industrial applications
  • Renovation and relining
  • Marine intakes and outfalls
  • Water and chemical tanks
  • Penstock
  • Sewage treatment plants (small to mid size)
  • Irrigation
  • Manholes and inspection chambers
  • Road culverts

Approvals

Weholite pipes are manufactured in accordance with the product standards EN 13476, ISO 21138 and SFS 5906. The pipes have been awarded the Scandinavian quality mark INSTA-CERT No. 4075

Tanks & Chambers

Tanks & Chambers

Tanks can be used for storing large volumes of cold water for potable or non-potable use, and multiple odour control applications. The modular tanks are produced from Weholite high-density polyethylene panels, providing a strong, solid and reliable material. Weholite Modular offers the same versatility, longevity, eco-friendly qualities and value engineering as the renowned Weholite pipes do.

  • Tanks & Chambers
  • Tanks & Chambers
  • Tanks & Chambers

The modular range of above ground tanks are suitable for ease of installation within an external or internal environment, and its pure design allows the product to be situated even in the harshest environments. The tanks can be delivered to the construction site in flat pack panel format, whereby our site crews then assemble it, or alternatively should site conditions afford it; they can be delivered as a 1-piece unit. Should your project require a new storage tank, replacement ancillaries to an existing tank, or replacement of an existing tank, we can provide expertise and specialist knowledge to guide you through in order to achieve the best solution. The same goes for chambers and manholes.

With Weholite, raw material properties have been combined with advanced product technology to create a lightweight engineered solution with superior loading capacity that is inert to H2S. Pumping chambers made from either Global leading brands Weholite or Weholite Modular provide a bespoke, fully designed modular solution. Factory built to high precision and pressure tested for integrity they provide a plug and play system that incorporates any pump, in any configuration and fitted into any shape or size of chamber. All the benefits of modular construction, factory built and expertly designed, we continue to deliver the luxury of improved carbon footprint, improved construction efficiency and improved performance. The applications include:

  • Sewer
  • Potable water
  • Industrial
Special Design – Fit for Purpose

Special Design – Fit for Purpose

Customised solutions are often not only the best for the ultimate objective, but also shortens the installation time significantly. Experienced production teams in combination with unique technology makes everything possible! There are great opportunities with Weholite prefabricated products, produced by the best available tools and latest technology.

  • Special Design – Fit for Purpose
  • Special Design – Fit for Purpose
  • Special Design – Fit for Purpose
We offer highly-skilled specialists in developing and producing solutions for the most difficult and complicated jobs. Using Weholite, every single solution can be customised 100% in terms of appearance, including length, thickness, rigidity and colour. This construction is uniquely durable, chemical resistant and impact-resistant down to -20 °C.

SERVICES

TURN KEY SOLUTIONS

Comprehensive design service includes for instance flotation calculations combined with advanced finite element analysis results, in order to visualise the behaviour of the pipe under buried conditions. All services can be delivered ready to use on the strength of our long experience. The following services are provided:

  • Design & calculations
  • Tailor made products, fit for purpose
  • Technical support
  • Field services, such as welding and ballasting of pipe
  • Project management

In addition to designing innovative water management solutions within the housing sector, Weholite products are used across the whole construction industry for water management infrastructure. Weholite has been utilised on major surface water drainage projects all around the world.

Weholite is suitable for marine installations for example intakes and outfalls for power, desalination and thermal cooling plants etc.: it is impervious to salt water and corrosion, the welding joints are watertight and the dimensions extend up to DN/ID 3500 mm. The flexible

Weholite adapts to loading differences on the sea floor better than a pipe made of a stiff material. The handling and installation of the light pipe is easy also for large dimensions.

Installation method

Above ground, underground, marine

Applications include

Anything is possible!


FAQ

What is the difference in the flow capacity between a Weholite pipe and a concrete pipe with the same inside diameter?

There are several aspects affecting the flow capacity, e.g. the age of the pipe, inclination, diameter etc. See following example:

Weholite pipe di=600 mm and an inclination of 2‰ have a capacity of 340 l/s (k=0,25 mm). A concrete pipe with the same conditions have a capacity of 290 l/s (k=1 mm).

How to joint a Weholite pipe?

There are three main methods of connect Weholite pipes, which are:

  • Socket connection up to DN1000
  • Thread connection up to DN2000
  • Welded connection up to DN3500

How to prevent that the Weholite pipe will not uplift in high ground water area?

When installing pipes under the ground water level, the buoyancy of the pipe shall be taken into consideration. When needed, the natural uplift of the pipe should be counteracted. This can be designed case by case. Please do not hesitate to contact our nearest office for adequate technical information.

Is the Weholite pipe suitable for use under railroads? How can it be installed?

Weholite is suitable for most of the underground installations, including under railroads. However, the regulations for the installation can differ between countries. Please contact the local Weholite licensee for more information.

Since when has Weholite been applied in the areas of water distribution- and transmission applications?

Since the beginning of 1980s.

Is Weholite environmentally friendly?

Weholite can be considered as an environmentally friendly solution from different perspectives:

  1. Weholite is completely recyclable.
  2. For all practical purposes, PE is chemically inert within normal use. In other words, PE does not rot, rust or corrode as a result of chemical or electrical reactions in any soil type, nor does it release or dissolve anything into the soil. More information on the chemical behavior of PE is given in ISO 10358.
  3. It is environmental friendly as less material (kg/m) is needed.
  4. It is less risky to use Weholite, due to a pipe made of Weholite includes fewer joints. Hence, the risk of leakages is lower.
  5. A lower carbon footprint is produced. Also the need for less machinery and fast installation minimizes the use of electricity. Interesting information about installing a plastic pipe can be found in a report of Teppfa. You can request the report here.

What is the maximum water pressure for a Weholite pipe?

Standard Weholite pipes can withstand an internal pressures of 1,0 bar. Weholite bends and fittings must be specially manufactured as pressure parts. Weholite LP pipe can be tailor made for pressure ratings up to 2 bars. Learn more about it in this reference.

What is the allowable bending radius of a Weholite pipe?

Bending radius >=100xOD up to DN1500. For bending of larger dimensions, please contact us. Bending with socket connection is not allowed.

What is the life expectancy of HDPE pipe in waste water applications?

More than 100 years.

How is the Weholite pipe SN 2, 4, 6, 8 KN/m2 installed?

The installation possibility can be calculated using the calculation tool on the website.

What maintenance does the Weholite pipe require?

No particular maintenance is necessary.

How to become a licensee?

If you are interested to become a licensing partner, please contact Jari Mylläri for more information.

LICENSING

Do you want to become a licensee?

Joining the Weholite family

By becoming a Weholite licensee you will be a member of a unique and dynamic family in the world of large diameter plastic pipes.

The foundation of the Weholite family is sharing knowledge, ideas and resources. An open atmosphere between the family members guarantees that a combination of the family’s experience and your new ideas will create a successful business.

Our family is a global network of companies running their own independent business with some of the companies having Weholite as the main concept and some as a complimentary to other activities.

You have a market and a business idea and we have the tools for your implementation. Uponor Infra Technology offers you a Weholite Licensing Agreement including production lines and equipment as well as production and product know-how.

The Weholite pipe production line is the main part of the Licensing Agreement and together with various equipment for production of Wehopanels, fittings, joints, field jointing and quality control, we can ensure you to have a compete production set-up. The range of equipment can be tailor-made to suit your needs.

Production support by Uponor or other licensees will always be available to you. The Licensing Agreement includes optimizing of the production set-up, training of personnel and access to continuous production development.

The full range of know-how related to Weholite will be available to you through the License Agreement including patented technology and products. You will also be able to share the Trademark of Weholite, references, internal product standards and manuals, calculation software, product development, quality controlling and marketing material with the rest of the Weholite family.

As you have your main business in a certain territory it will of course be exclusive to you, as defined in the License Agreement, but comes with supportive network of a family sharing the same focus in creating a successful Weholite business. We meet regularly at seminars and in working groups for enhancing the business further.

Cooperation with Uponor Infra’s Project Services in large or technically advanced marine projects will be a benefit for you from risk management point of view

Some ideas for your future Weholite business with applications explored and developed by Uponor Infra and our Licensees could be storm drainage, sewer, irrigation, penstocks, relining, manholes, inspection chambers, road culverts, marine intakes and outfalls, water and chemical tanks, infra tunnels, ventilation, sewage treatment plants. And not to forget - your own inventions and ideas, since Weholite concept is a wonderful base for pre-fabrication of all kind of products with a requirement of quality, durability, environmental friendly and economical solutions.

We will be delighted to share additional information with you and tell you more about the world of Weholite.

INTERESTED TO BECOME A LICENCEE? More information jari.myllari@uponor.com

DOWNLOADS

Weholite Manual

The Basics of Weholite Pipe System

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Weholite Licensing

Weholite a global leader

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Pipe World 1/2017

The Uponor Infra Customer Magazine

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Pipe World 1/2016

The Uponor Infra Customer Magazine

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Pipe World 2/2015

The Uponor Infra Customer Magazine

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Pipe World 1/2015

The Uponor Infra Customer Magazine

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Pipe World Issue 16

The Uponor Infra Customer Magazine

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Pipe World Issue 15

The Uponor Infra Customer Magazine

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Pipe World Issue 14

The Uponor Infra Customer Magazine

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Pipe World Issue 13

The Uponor Infra Customer Magazine

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Pipe World Issue 12

The Uponor Infra Customer Magazine

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Pipe World Issue 11

The Uponor Infra Customer Magazine

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Pipe World Issue 10

The Uponor Infra Customer Magazine

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Pipe World Issue 9

The Uponor Infra Customer Magazine

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Pipe World Issue 8

The Uponor Infra Customer Magazine

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Pipe World Issue 7

The Uponor Infra Customer Magazine

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Pipe World Issue 2/2006

The Uponor Infra Customer Magazine

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Pipe World Issue 2/2006

The Uponor Infra Customer Magazine

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Pipe World Issue 2/2005

The Uponor Infra Customer Magazine

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Pipe World Issue 1/2005

The Uponor Infra Customer Magazine

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Pipe World Issue 2/2004

The Uponor Infra Customer Magazine

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Pipe World Issue 1/2004

The Uponor Infra Customer Magazine

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REFERENCES

Asset International Great Britain

Asset International Great Britain

Thames Water utilises Weholite technology in multi billion pound Victorian sewer upgrade project

READ MORE

Biopower Plant Finland

Biopower Plant Finland

Plastic pipes with the largest diameter in Finnish history are being installed at the biopower plant that is under construction at Keljonlahti in Central Finland. The pipes are to be used as transfer lines for cooling water.

READ MORE

Båtstø Norway

Båtstø Norway

The village of Båtstø in Hallangen, Norway, is stepping into a new era of green self-sufficiency. More than two hundred of its homes have now been connected to the village’s very own communal wastewater treatment plant.

READ MORE

Hydropower Project Canada

Hydropower Project Canada

Hydroelectricity has been used in Canada for more than 100 years and today represents two-thirds of the country’s power generation. While hydroelectric power is not a new concept, using large-diameter high density polyethylene pipe to transport water from a source to the generator is relatively new and is helping increase efficiency standards in construction and operation.

READ MORE

Infratunnel Protects Pipes Sweden

Infratunnel Protects Pipes Sweden

An almost two-kilometre long infratunnel with an internal diameter of 2.2 metres will house all of the piping needed for the infrastructure of a new city district being added to the southern Swedish city of Linköping. Excavations in the streets and residential areas will soon be history, since all maintenance and installation work will be achievable within the infratunnel.

READ MORE

Plastic pipe withstands Finland

Plastic pipe withstands Finland

When Stora Enso’s mills sought a new solution for the transport of process water, the forest industry corporation selected Weholite pipes manufactured from polypropylene. Unlike the concrete channels previously used, polypropylene pipes can withstand hot water that contains chemicals without suffering from corrosion.

READ MORE

Road Culverts Canada

Road Culverts Canada

Construction and traffic flow smoothly Construction work on the 407ETR highway was completed with minimal disruption to the motoring public.

READ MORE

Stormwater Tanks Finland

Stormwater Tanks Finland

With a bit of good luck, a property can overcome rains without flooding, but fewer and fewer count on such luck. As its stormwater solution, a waste power plant to be built in southern Finland chose one-hundred-metre long Weholite tanks.

READ MORE

Super Sized Cooling Philippines

Super Sized Cooling Philippines

The Petron Bataan Refinery (PBR), based in the Philippines, chose Weholite, a high density polyethylene (PE-HD) pipe, for the completion of its cooling water intake and outfall pipelines.

READ MORE

Contact

 

Please find your closest Weholite partner:
orange means a Weholite licencee and light blue means a Uponor Infra factory.

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