References
Companies listed below have performed tests at FFI and have agreed to be listed below.
This list is arranged in alphabetical order and its completeness is not guaranteed.
| Company | Locality; Country |
| BelmaFlex as | Farsø; Denmark |
| BEM Rohrnetzservice GmbH | Dinslaken; Germany |
| BRUGG Rohrsystem GmbH | Wunstorf; Germany |
| Canusa Systems Limited | Crawley; Grait Britain |
| Eurotubi s.r.l. | Mozzanica (BG); Italy |
| German Pipe Industrie- und Fernwärmetechnik GmbH | Nordhausen; Germany |
| HPW Industrievertretungsgesellschaft mbH | Haßloch; Germany |
| INPAL Industries SAS | Le Havre; France |
| ISOPLUS Fernwärmetechnik GmbH | Sondershausen; Germany |
| Isrotec Produktions GmbH | Speyer; Germany |
| LOGSTOR A/S | Løgstør; Denmark |
| Roberto Spaija Consulting | Berlin; Germany |
| Saudi Preinsulated Pipes Industries LLC | Riyadh; Saudi Arabia |
| Seal for Life Industries bvba | Westerlo; Belgiun |
| SET Pipes GmbH | Haltern am See; Germany |
| Uponor Infra Fintherm a.s. | Prague; Czechia |
| Vexve Oy | Sastamala; Finland |
| Zakład Produkcyjno Usługowy Międzyrzecz Sp. z o.o. | Międzyrzecz; Poland |
| Zinchitalia SpA | Alfianello (BS); Italy |