Amiblu – two brands with a rich history

World-class GRP pipes and fittings designed for generations.

We are Amiblu

Amiblu designs and supplies world-class GRP pipes and fittings with an exceptionally long lifetime. Our aim is to solve the world’s water, sewer, and energy challenges in a future-oriented way. We are experts in GRP system solutions for wastewater, stormwater, drinking water, irrigation, hydropower, and industry applications.

Our long-term experience of more than half a century in GRP production and research makes us fit for future challenges. With an accredited GRP pipe testing laboratory in Norway, our innovative spirit is based on a solid R&D background. Amiblu’s headquarters is in Klagenfurt, Austria, and the company has production facilities in Germany, Spain, Poland, and Romania. It employs around 1,500 people worldwide.

Our licensee partners around the globe, plus an extensive network of sales and engineering offices, add a further global dimension. Wherever our customers require a high-performance solution, Amiblu experts deliver precisely what they need. To date, Hobas and Flowtite products are used in 125 countries worldwide – lined up, our pipes would span the globe several times.

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.