This standard specifies the terms and definitions, structural types and model preparation methods, technical requirements, materials, test methods, inspection rules, marking, painting, packaging and storage of injection valves for metallurgical descaling systems (hereinafter referred to as "injection valves"). Transportation. This standard is applicable to injection valves with nominal pressures PN250~PN320, nominal sizes DN25~DN200, operating temperatures not greater than 80°C, and industrial water as the medium in metallurgical descaling systems. Injection valves used in other systems can also be used as a reference.