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Background

The Ratchaburi Power Project is a combined cycle unit belonging to Ratchaburi Power Company, an independent power producer, which has a long-term 25- year power purchase agreement with EGAT. The plant is located some 80km south west of Bangkok in Ratchaburi province and construction was started in 2005. The plant has a total capacity of 1,400 megawatts, which is supplied by two combined thermal units of 700 megawatts capacity each. The plant was due to be on line in early to mid 2008.

Operating Conditions

Ratchaburi Power Plant uses two types of fuel Natural Gas and Oil. The power plants are installed with Stacks, Cooling Towers and Waste Water Treatment facilities. As is normal with Power Generation Plants the wastewater treatment is a chemical process, which is highly corrosive, and site assets where the chemicals are stored, transported and used need suffcient corrosion protection to guarantee a long trouble free service life.

Special Requirements

Trepax were awarded a contract by MHI the project EPC to supply protective systems for the Waste Water Treatment Plant. Trepax were also awarded an installation contract by Sino Thai the projects main civil contractor. Trepax had previously worked with EGAT engineers on the design and specifcation of the protective lining systems. A special conductive vinyl ester primer was used to allow the lining to be tested by a holiday detector for the presence of pinholes. This enables the application of a defect free lining system, which assists in providing maintenance free long term protection.

System Specifications

A fbre reinforced epoxy vinyl ester lining system was specifed and used for this project for all areas of the waste water treatment and surrounding concrete.

Project Details

Location	Ratchaburi, Thailand
Project	Ratchaburi Power Project
Owner	Ratchaburi Power Company Limited
EPC	MHI
Contractor	Sino-Thai Engineering & Construction Public Company Limited
Date	2007
Work	Concrete Waste Water & Turbine Floor
System	Various
Area	6,800 m2
Value	US$ 400,000