- Tata Steel, Netherlands
- Clyde Bergemann Brinkmann GmbH, Germany
- Standardkessel GmbH, Germany
- LOI Thermprocess GmbH, Germany
- RWE Kraftwerk Huckingen, Germany
- RWE Kraftwerk Duisburg - Hamborn, Germany
- SMS SIEMAG, South Africa
- Five North American, Great Britain
- BDI, Slovakia
- APA-Kandt, Germany
- Hydro Aluminium, Germany