Oil and Gas Industry / Power Plant

• Bangkok Industrial Gas Co.,Ltd.
• Praxair ( Thailand) Co.,Ltd.
• Thai Industrial Gas Co.,Ltd.
• The Glow Group
• Alliance Refining Co., Ltd.
• Egco Engineering & Service Co., Ltd.

Petrochemical / Chemical Industry

• Bayer Polymer Co., Ltd.
• Thai Plastics and Chemicals Co., Ltd.
• Thai Petrochemical Industry
• SCC-Dow Chemical Co., Ltd.
• Ineos ABS (Thailand) Co.,Ltd.
• Tuntex (Thailand) Co., Ltd.
• PTT Group

Automobile / Assembly Parts Industry

• General Motor Co., Ltd.
• Auto Alliance (Thailand) Co., Ltd.
• Siam Zexel Co., Ltd.
• Bendix (Thailand) Limited.

• Diakin Industry.
• Mitsubishi Electric Consumer Products
• MIG Production Co.,Ltd.
• Emerson Electric (Thailand) Ltd.
• Rohm Apollo Co., Ltd
• Egco Engineering Service Co.,Ltd.
• Alstom Power (Thailand) Ltd.
• Bangkok Industrial Gas
• TOC Glycol Co.,Ltd.
• PTT Group
• Etc.

Other Industry- EEE Co.,Ltd.

• Inctech Metrology Co., Ltd
• Yokogawa (Thailand) Co.,Ltd
• Mingdeng Metrology Co.,Ltd
• QTC (Thailand) Co., Ltd.
• PTT Group
• Bangkok Industrial Gas
• Yokohama Tire Manufacturing (Thailand) Co.,Ltd.
• Tokuyama Siam Silica Co.,Ltd.
• Bridgestone Metalfha (Thailand) Co.,Ltd.- etc.