Dong O Flange co, Ltd
* Own factory (31,750 m) with skilled manpower and modern machinery, laboratory * strong item : welding neck, slip-on, lap-joint, blind, threaded, sock welding flange, etc.. * ISO 9001 & 14001 certification * main market : Oil/Gas process equipment, petro- chemical, construction, plant power, shipping, etc.. * strict quality control & strong responsibility
