Technobell is an engineering company and in order to deliver state of the art products it requires cutting edge technology for design, simulations and animations. Therefore we use SOLIDWORKS and FARO 3D to develop and implement all our projects.

Our long-term supplier of software solutions, IB-CADDY from Ljubljana, invited us to speak at their latest workshop where Luka Dolenc, Head of commercial department, shared our experience in using Solidworks and Faro 3D in designing our patented Double Salt Zone Reactor, 3D scanning of complete petrochemical process unit as well as in design of different machines used in our GRP factories.


At the beginning of March 2020 our engineers completed the upgrading of an existing Technobell CFW2600 machine. The upgrade was made in two steps, first the maximal diameter was enlarged from DN2600 to DN3000, and secondly the production speed was increased by 50%. Both mechanical and automation modifications were performed.

Technobell has extensive experience in manufacturing new CFW machines with a wide range of diameters (from 300 up to 4000 mm) and upgrading existing ones. We provide various services related to GRP pipes production. You are welcome to contact us for more information:


JEC World 2020 was postponed from March 3 – 5, 2020 to May 12 – 14, 2020.

We hope you can reschedule your participation and visit us at our booth K50 in Hall 6, meet our staff and learn about Technobell’s latest developments in Glass Reinforced Polyester (GRP) Pipes Production Technologies and Chemical Process Production Technologies.

Looking forward to meeting you at JEC World in Paris!

Technobell Team


TECHNOBELL Koper is proud to announce that it has received the Social Responsibility Certificate SR 10:2015. The Slovenian Institute for Quality along with the Swiss IQNet grant the said certificate only to companies that act for the benefit of society at large. Besides maintaining an ethical business policy we act in the best interests of the environment, our clients, our suppliers, our employees, our city, our country and the community as a whole. Social responsibility is a duty thatwe perform every day to maintain a balance between the economy and the ecosystem we live in.


The Technobell petrochemical team attended the Clariant Maleic Anhydride conference which took place in Munich from 14 to 17 October 2019. The conference was an informative and at the same time socializing event that comprised three days of interesting discussions with various experts, including the Maleic Anhydride catalyst supplier, process licensors and equipment manufacturers. It was a unique opportunity to meet with our clients and potential future partners in one place, which provided an incredible networking experience.

At the conference, Technobell also had the opportunity to present its 3D model of patented Double Zone Tubular MA Reactor and the latest developments in Reactor performance optimization called Technobell Advanced Reaction Control (TARC) System.

We would like to thank and congratulate the Clariant team for the successful organization of this event.


Technobell Technology was granted a patent for »Double zone tubular reactor and method for carrying out maleic anhydride production by n-butane oxidation«

Technobell Technology is proud to announce that we have been granted a patent by the US Patent & Trademark Office for »Double Zone Tubular Reactor and Method for Carrying Out Maleic Anhydride Production by N-Butane Oxidation«. This highlights the innovations that are being carried out in our petrochemical department. We would like to thank our colleague COO Gabor Toth, the inventor, and his team who are focused on constant process and equipment design developments.

On this occasion Gabor Toth said: »Receiving this Patent is not only a validation of our know-how but even more confirmation from a world-renowned independent institution about the value of our R&D activities that result in new and useful innovations. We believe that by the application of Technobell’s exclusive State-of-the Art Maleic Anhydride Technology and Double Zone Reactor, our Clients will be satisfied owner of the market leading production performance.«


Abstract from the patent »Double zone tubular reactor and method for carrying out maleic anhydride production by n-butane oxidation«

A tubular reactor that produces maleic anhydride from a gas mixture containing n-butane and oxygen includes a first reaction zone including an inlet for the gas mixture and a second reaction zone including an outlet for a reaction gas mixture, a plurality of tubes extending in an axial direction through the first and second reaction zones, a temperature control system, configured for controlling a reaction temperature in each of the reaction zones independently, includes a heat transfer system for each of the reaction zones configured for controlling the temperature of a liquid coolant flowing through one of the reaction zones, and a circulation pumping system configured for controlling flow conditions of the liquid coolant flowing through the reactor and one of the heat transfer systems, and a preheating arrangement configured for preheating the gas mixture such that the gas mixture enters the first reaction zone at a predefined inlet temperature.

Technobell’s GRP Pipe Hydro-Testing Machine:  Faster, Stronger & Safer

Technobell’s Continuous Winding Machines are now able to reach the record production speed, even 60m/h. This allows the reduction of pipe production cost, something that all pipe producers are looking for.

In order to follow the high pipe production output, Technobell`s technical department has developed the latest generation Hydro-Testing Machine which is capable to test 100% of pipes produced at a maximum speed. This is rendered possible thanks to its completely automatic, PLC based control system. All technical aspects have been thought in order to make the Hydro-Testing Machine safe, easy to use and most efficient of its kind.

All Hydro-Testing Machine’s features allow the testing process to be performed by only one operator in absolute safety.

Our Hydro-Testing Machine has been designed to withstand up to 1,350 ton of end thrust load with a safety factor of 1.5 which is the highest among this type of machines available on the market. Moreover, all testing data are recorded and can be shared with QC via LAN connection.

The pump piping capacity has been sized in order to reach a testing pressure of up to 100 bars which allows the user to perform a burst test even on a DN 1000 mm pipe.

In the figure below you can see a comparison between Continuous Winding Machine production time and the Hydro-Testing Machine testing speed using the relevant standards (ISO 7511, AWWA C950, BS 5480).


Middle East is investing in a new Maleic Anhydride plant using Technobell’s Technology


After completing the engineering of the new 22.000 TPY Maleic Anhydride plant based on Technobell’s License the production plant erection is currently ongoing.

The expected start-up of the newest Middle East Maleic Anhydride plant is foreseen in the beginning of 2020 and will be under the supervision of Technobell’s experts.

Technobell is going to support the plant operations management during the initial plant operating period involving three former Maleic Anhydride plant managers of Technobell.

Technobell would like to thank all visitors, partners and customers who visited our booth at JEC World 2019 in Paris.  Our team of experts from the GRP, Polyester Resins and Petrochemical departments where excited to meet you and  share their knowledge about the composite industry.

Technobell’s Double Zone Maleic Anhydride Reactor Ready for 60.000 TPY Capacity.

The Research and Development Team from Technobell’s Technology Department has successfully finished the design of its new High capacity Double Zone Reactor for n-butane based Maleic Anhydride production with single train capacity up to 60.000 TPY.

The most advanced reactor is a result of constant research and development of Technobell’s engineering team, well-known for its continuous focusing on technology know-how and process equipment improvements based on market demands and known bottlenecks of worldwide operating reactors.

The new reactor combines the advantage of the revolutionary performance of Technobell’s licensed Double Zone Reactor and high production capacity resulting in a market leading production performance, productivity, economisation and efficiency.

Reactor’s key features:

  • Concentric salt circulation results equal salt distribution both in radial and axial directions around the catalyst tubes.
  • Central reaction gas inlet with special gas distributor design ensures identical GHSV in each catalyst tube.
  • Operation with the Double Zone Reactor leads to high production flexibility with exceptional high reaction maleic anhydride yield.
  • Gives flexibility to the end-user to generate any MP, HP or HHP steam as required by its process.
  • Operation with high n-butane concentration in the feed gas parallel with high n-C4 conversion and selectivity.
  • Reduced hot-spot temperature and smooth catalyst temperature profile extends the catalyst lifecycle.
  • Significant investment cost reduction.