Reference are –
- AGIP KCO Kazakhstan
- AMPT Germany
- Andritz Hydro/GE
- ARH, Algeria
- Bangalore Metro Rail India
- BHI Korea
- Chiyoda, Japan
- COBRA Italy
- DAELIM
- EDP Portugal
- ENI Italy
- ESKOM South Africa
- Honeywell
- Hyundai Heavy Industries (HHI)
- IHI UK/ Diesel United Japan
- INPEX Australia
- JGC, Italy
- JKC Australia
- JKC Japan
- Kolkata Metro Rail India
- Kordestan Petrochemical Iran
- Lorestan Petrochemical Iran
- Mohabad Petrochemical Iran
- NDEC
- Pardis Petrochemical Iran
- Petrofac UAE
- POSKO Energy Korea
- PT MEINDO Indonesia
- Samsung Korea
- SBM Group France & Netherland
- Siemens Austria
- Technimont Italy
- TECHNIP
- TOYO Engineering
- TR
- TUEPRAS Turkey
- TUEV Germany
- TÜV SÜD/ALSTOM
- Voestalpine VAE GmbH Austria
- ZOHN ZINK KEU GmbH Germany