iIt is our great pleasure to our customers Dong-O Flange. Since its establishment in 1989, our company has furnished with modern state-of-the-art equipment and facilities, with a lot of experience and accumulation of technology.

We provides costomers with a variety of high quality flanges in the fields of heavy industry, such as ship-building, petro-chemicla plants, power plants and others. As a result of our efforts, we achieved award in the Division from Doosan Mecatec and gained ISO9001 certification and ISO14001 certification for systematic Management and Environmental Management.

Our company does business with DOOSAN MECATEC, SEWON CELLONTEC, DAE KYUNG MACHINERY & ENGINEERING AND S&TC which have manufactured heat exchanger and pressure vessel for a long time. Besides we have exported flanges around the world such as Japan and Germany and then we have received recognition about our highest standard of quality and superb technology from our customers.

Our company has achieved impression through the best quality and best delivery. All the staff and administration will do the best in order to become top global company about flange business area of 21C through a higher value-added business and high-tech advances.