NESS Wärmetechnik GmbH carried out a demanding industrial project for Unilin in France to integrate a new recycling process for MDF and HDF chips. The focus was on engineering, fabrication, and installation of modern piping systems under significant time pressure. The project was managed on the NESS side by Philipp Müller, while Guillaume Simon served as the main contact at Unilin.
For the introduction of the new batch process, Unilin required reliable industrial process integration. Piping systems were installed for steam, thermal oil, and a steam-fiber mixture. The challenge of the project lay not only in its technical complexity but also in the surrounding conditions: parts of the buildings were still under construction while other trades were installing their components in parallel. Only four weeks passed between order placement and the start of installation.
„This strategic and challenging project required the collaboration with a trustful company to guarantee work done to the highest standards. The NESS team (Andreas, Philipp, Markus, Oliver among others) was fully dedicated to our innovative and demanding project. I started to work with NESS more than 15 years ago and I have always appreciated our partnership (ie. innovative products, competence, knowledge transfers, and friendliness). NESS is a first-choice partner with whom I hope to continue to work successfully in the future.“
NESS was responsible for the complete planning, stress analysis, prefabrication, and installation of the piping systems. The work was closely coordinated with other trades. In total, the team installed approximately 650 meters of industrial piping.
The thermal oil pipelines were designed for an operating pressure of 10 bar and temperatures of up to 300°C. During operation, temperatures typically range between 250 and 280°C.
A particular challenge was a DN300 steam distribution manifold classified in Category IV, which underwent TÜV inspection and approval. Steam pipelines place special demands on planning and execution due to high internal pressures and the risk of steam hammer.
The design parameters of the steam pipelines were 19 bar pressure and a temperature of 215°C. Thanks to the close collaboration between the engineering and installation teams, as well as extensive experience in industrial piping construction, these requirements were implemented safely and professionally.
Particularly noteworthy is that CE Declarations of Conformity in accordance with the Pressure Equipment Directive were issued for the steam pipelines DN100 (Category I) and DN200 (Category II) installed within the project.In addition, the steam distributor DN350 (NVT 700) in Category IV underwent a full conformity assessment in accordance with the Pressure Equipment Directive in conjunction with the AD 2000 Code, including successful TÜV approval.This not only demonstrates NESS’s technical expertise in the industrial high-pressure range, but also ensures the highest safety and quality standards in compliance with European regulations.
The installation phase ran from June 2 to August 19, 2025. Prefabricated modules were installed step by step while additional components were produced in parallel. Despite challenging framework conditions, both the scheduled timeline and the defined budget were maintained. The coordinated approach enabled the safe integration of the new process components. The project once again highlights NESS’s expertise in complex industrial projects, particularly where technical know-how, flexibility, and efficient project management are essential.
The planned timeline was successfully met. Cooperation between NESS, Unilin, and all involved trades was efficient and solution-oriented. The industrial piping installation was completed safely and according to plan.
With this international project, NESS demonstrates its expertise in industrial pipeline construction and the technical implementation of complex process plants. Precise engineering, structured project coordination and close consultation have resulted in a stable solution for modern recycling processes. The combination of technical expertise, structured project coordination and partnership-based cooperation forms the basis for sustainable and future-proof process solutions.
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