Equipment and piping for offshore facilities
- Chevron Thailand Exploration and Production Ltd.
- Chevron Offshore (Thailand) Ltd.
LPG/NG Vessel and System, Petroleum Storage Tank in Refinery and Petroleum Terminal
Shop Inspection and site installation, maintenance inspection, turnaround inspection, statutory inspection
- PTT Public Co., Ltd.
- The Bangchak Petroleum Public Co., Ltd.
- Thai Oil Public Co., Ltd.
- IRPC Public Co., Ltd.
- Esso (Thailand) Public Co., Ltd.
- WP Energy Public Co., Ltd.
- Unique Gas and Petrochemicals Public Co., Ltd.
- Siam Gas and Petrochemical Public Co., Ltd.
- Star Petroleum Refining Co., Ltd.
- Thai Petroleum Pipeline Co., Ltd.