Doojin Co., Ltd. (CEO Yang-gyu Kwak) announced that it will participate in World Hydrogen Expo 2025 (WHE 2025), which will take place at KINTEX from December 4 to December 7.
Founded in 1994, Doojin localized Korea’s first cryogenic vacuum vessels and vacuum-insulated piping systems and has since carried out design, manufacturing, installation, after-sales service, and licensing work. The company currently focuses its business on cryogenic applications, including liquid hydrogen vacuum-insulated piping, vacuum valves, vacuum hoses, cryogenic vessels and storage tanks, and high-pressure gas facility construction.
Doojin has also contributed to the advancement of Korea’s cryogenic equipment industry for 35 years as the domestic agent of U.S.-based global cryogenic equipment company Chart Industries (formerly MVE). In addition, the company supplies products in Korea through partnerships with leading overseas manufacturers, including Technifab, Cryofab, Planer, Cryotherm, ACME, and Thermco.
Doojin has built a track record that includes manufacturing and installing Korea’s first LH2 vacuum-insulated piping system for the High-Changwon liquid hydrogen plant in 2023 with Doosan Enerbility, producing and installing vacuum piping for Korea’s first small-scale liquid hydrogen plant manufacturing facility in 2023 with Chungnam Techno Park and Parity, participating in the liquid hydrogen refueling station at Incheon International Airport Terminal 2 in 2025 with SK E&S and Bumhan, and carrying out ongoing complete construction projects for Hyundai Motor’s Namyang liquid hydrogen refueling station and Hyosung Hydrogen’s liquid hydrogen refueling stations in Ulsan and Changwon, both scheduled for completion in 2026.
At the exhibition, Doojin will introduce its lineup of liquid hydrogen cryogenic equipment, including cryogenic vessels, vacuum-insulated piping, and ultra-low-temperature containers.
Doojin emphasized that its vacuum-insulated piping is advancing Korea’s cryogenic technology through optimized design, quality, and reliability tailored specifically for liquid hydrogen. The company’s cryogenic vacuum piping products serve as specialized piping systems for transporting liquefied gases such as LH2, LN2, LNG, LO2, and LHe, maintaining stable temperatures and enabling safe, efficient flow.
This functionality comes from a double-pipe structure in which the inner pipe carrying the fluid sits inside an outer jacket pipe. A vacuum forms between the two pipes, blocking heat ingress into the inner pipe during liquid gas transfer and minimizing boil-off losses caused by temperature increases.
Doojin currently exports its products to China, Vietnam, and Thailand and plans to diversify its overseas markets further to include Japan and the United States.
Meanwhile, the World Hydrogen Expo 2025 is the world’s largest hydrogen industry event, bringing together hydrogen companies from around the globe to showcase the latest technologies and trends and create opportunities for global collaboration. Starting this year, the Hydrogen International Conference and the hydrogen industry exhibition H2 MEET have been integrated into a single event featuring both exhibitions and conferences. The event spans the entire hydrogen value chain from production to storage, transportation, and utilization. It aims to establish itself as a global hub for sharing innovative technologies and market strategies.
