Alloy steel F22 (EN 1.7380) valve is an ideal valve for subcritical boiler systems with temperatures ≤540°C; it is also the preferred valve for subcritical thermal power plants. In addition, alloy steel F22 (EN 1.7380) valves have strong resistance to high-temperature hydrogen-induced cracking (HIC) and hydrogen embrittlement resistance, so alloy steel F22 (EN 1.7380) valves are also widely used in hydrogenation devices.