Amiblu is a joint venture of two brands with a rich history

Hobas logo
Flowtite logo

About Us

Amiblu is a 50:50 joint venture whose goal is to develop and deliver world-class GRP pipes and fittings to responsibly solve the world’s water and sewer challenges. Amiblu combines Amiantit Europe and its Flowtite Technology, and Hobas Europe, part of WIG Wietersdorfer Holding, and is the specialist in drinking water, irrigation, storm- and wastewater, hydropower and industry.

The two businesses have distinct expertise that complement each other perfectly. Hobas is a leader in centrifugally cast pipe systems, and Flowtite in continuous filament wound pipe systems. Amiblu’s headquarters is in Klagenfurt, Austria, and the company has production facilities in Germany, Spain, Poland, Romania and Africa. It has a R&D centre in Norway and employs around 1,500 people.

Our licensee partners around the world, plus an extensive network of sales and engineering offices, add a further global dimension. The result is that wherever our customers require a high performance solution, Flowtite and Hobas come together to deliver precisely what they require.

first CC-GRP pipes with Beetle


It all began quite modestly at the Basle Dye Works in 1957 where wooden cylinders were employed for the dyeing process. These kept splintering and deforming after some time putting the expensive textiles at risk. Seeking a suitable replacement for the cylinders, the factory’s engineers developed a centrifugal casting method using glassfiber reinforced plastics (GRP). Thanks to the method and material, they achieved perfectly concentric cylinders with a precise outer diameter and smooth surface – just as required.

GRP had previously been used for shipbuilding, automobile and aircraft industry. However, its resistance to both corrosion and chemicals also made the material highly suitable for other applications. The Swiss, renowned for their vision and pioneering spirit, recognized its benefits and soon employed centrifugally cast pipes for conveying water – a new company was born: Hobas. The pipes laid at these early times are still in use today. Step by step, the products were improved, the manufacturing process was automated, the product range extended, and tailor-made fittings were added to the portfolio.


In 1927, in Sandefjord, a small shipping town on the coast of Norway, Odd Gleditsch started a manufacturing plant for vegetable oils called Vera Fabrikker, this plant was the cradle of Flowtite pipes.

Linseed oil was an ingredient he needed in the production of paint for the Jotun paint company. In 1965, a group of engineers at the plant started experimenting with polyester resin and glassfiber. Along with the Danish company Drostholm, they invented the continuous winding method for the manufacture of GRP pipes and tanks. The material was revolutionary – it did not corrode, it was light, and thanks to the GRP sandwich construction, it achieved strength, stability, and durability.

Owens Corning took over 100 % of the company from Jotun in 1993. In cooperation with Owens Corning, Vera Fabrikker developed Flowtite GRP pipes and tanks as they are known today. Flowtite now operates pipe factories on five continents.

First Flowtite pipe history


1957 First production of centrifugally cast GRP pipes in Switzerland
1968The Amiantit Group was established in Dammam, Saudi Arabia
1968First production of continuously wound pipes at Vera Fabrikker (Jotun) in Norway
1971Owens Corning buys GRP Technology from Vera Fabrikker
1984Joint venture of HOBAS and the Wietersdorfer Group
1987Hobas opens pipe plant in the USA
1988Owens Corning aquires 90% of the shares in Veroc Technology (later Flowtite Technology)
2001Amiantit aquires Flowtite Technology
2003First production of non-circular GRP pipes in Germany
200750-year anniversary Hobas
2016Hobas and Amiantit (Flowtite) announce the companies’ intent to merge
201750-year anniversary Flowtite
2017EU Commission approves the merger
2017Amiblu is established with ownership of Hobas and Flowtite Technologies
2018Amiblu opens a state-of-the-art production facility for GRP fittings in Poland
2021Amiblu introduces the most stringent life-cycle assessments in the industry

Two technologies, endless possibilities

Flowtite technology

Find more information on Flowtite and its continuous filament winding technology HERE.

Hobas logo
Flowtite logo

Hobas technology

Find more information on Hobas and its centrifugally cast pipe systems HERE.


Technical data

Diameter, pressure, stiffness, and so much more… All the technical hard facts you need to plan, lay, and operate our pipelines.


Reference database

Over 30,000 projects in over 125 countries in over 60 years: Discover spectacular and technically challenging construction works with Amiblu’s technologies (Flowtite, Hobas, Amiblu, Amiscreen) in our reference database.


Our footprint

We aim to have life cycle assessments for all products by end of 2022 and a carbon-neutral pipe production by 2030. We use the resources we have—our business, our voice, and our network—to fight the climate crisis and inspire people around the globe to value water as we should.