One of the Authentic Manufacturer of A178 and SA178 carbon steel tubes in Japan, Hanko Steel provides premium tubing solutions for a range of industrial uses. Boilers, heat exchangers, condensers, and superheater systems all make extensive use of these tubes, which guarantee exceptional performance and longevity in high-temperature and high-pressure environments. Our A178/SA178 tubes are precisely manufactured to satisfy international standards, ensuring superior mechanical strength, corrosion resistance, and weldability for demanding applications.