Operational for more than 40 years, AMKO Service Company specializes in cryogenic trailer, high-pressure and stationary tube rehabilitation, including repair and testing. Its customers include industrial gas producers, oil field service companies, and cryogenic liquid and gas haulers. The company offers cryogenic, compressed gas and carbon dioxide equipment and services. Additionally, it provides retesting services and specializes in piping design, installation and fabrication. AMKO Service Company is located in Dover, Ohio, and is a wholly owned subsidiary of Praxair, one of the largest industrial gas company in North America and South America. Praxair produces, sells and distributes atmospheric and process gases and high-performance surface coatings.