Vessel, equipment, piping for maintenance and turnaround modification
- PTT Global Chemical Public Co., Ltd.
- Rayong Olefins Co., Ltd.
- Map Ta Phut Olefins Co., Ltd.
- Map Ta Phut Tank Terminal Co., Ltd.
- Thai Tank Terminal Co., Ltd.
- Siam Mitsui PTA Co., Ltd.
- Bayer Thai Co., Ltd.
- Thai Polycarbonate Co., Ltd.
- Praxair (Thailand) Co., Ltd.
- Ube Chemicals (Asia) Public Co., Ltd.
- Bangkok Synthetics Co., Ltd.