... 99.999%3) Nitrogen pressure: 0.1 – 0.7Mpa4) Dew point: -45°C5) Purification not needed, as nitrogen of 99.999 ... Metallurgy: For anneal protection, agglomeration protection, nitrogenizing, furnace washing and blowing, etc. Used in fields such as metal heating ... metallic mesh, galvanized wire, semiconductor, etc. 2. Chemical and new material industries: For chemical material gas, pipeline blowing, gas ...