Tokyo, Japan - August 20, 2007

Yokogawa (Thailand) Receives Control System Contract
for Largest Petrochemical Project in Thailand

Yokogawa Electric Corporation announces that Yokogawa (Thailand) Ltd., a subsidiary in Thailand, has received a contract to supply control systems, field sensors, and other devices for a petrochemical plant complex construction project of Map Ta Phut Olefins Co., Ltd., a petrochemical company of the Siam Cement Group.

Yokogawa will participate in the project from an early stage as a main automation contractor (MAC)* together with engineering, procurement, and construction (EPC) contractors. This will enable the company to contribute to the standardization of control device specifications, improvement of engineering quality, and reduction of costs and delivery times. This is the first time Yokogawa has won an MAC contract in Thailand.

This plant complex will be constructed at the Map Ta Phut Industrial Estate, which is located in Rayong, southeast of Bangkok. It is the largest petrochemical project in Thailand. A key part of the complex will be a naphtha cracker plant with an annual production capacity of 1.7 million tons (900,000 tons of ethylene and 800,000 tons of propylene). This plant complex will also produce downstream products and have an annual production capacity of 400,000 tons for both high-density polyethylene (HDPE) and polypropylene.

For higher propylene output, an olefins conversion technology (OCT) will be used that converts butene and ethylene to propylene using a catalyst. The plant will also employ the latest technology to enable the use of such materials as naphtha as well as light condensate obtained from the natural gas extraction and generation process.

Under the contract, Yokogawa will deliver to the plant complex a CENTUM CS 3000 Integrated Production Control System and ProSafe-RS Safety Instrumented System, as well as approximately 60 GC1000 Mark II Process Gas Chromatographs and 5,000 field sensors, such as pressure transmitters and flowmeters.

Yokogawa believes that it was awarded this contract because of the relationship of trust that it has established with the Siam Cement Group over a period of many years, and the customer’s high evaluation of its engineering capabilities and service network in the country.

Yokogawa will continue to provide optimum solutions from the user perspective based on leading edge technologies to all industries operating in Thailand, a country that is growing steadily, and will focus on increasing market share.

* There is an increasing tendency for plant owners to place control system orders directly with control system suppliers in order to increase plant construction efficiency and reduce costs and delivery period.