According to the query Baidu love sourcing shows that the nitrogen generator is a kind of equipment used to produce pure nitrogen, nitrogen is widely used in metallurgy, chemical, electronics, food and other industries. The national regulations for nitrogen generators are divided into 3 categories according to the volume and the use of pressure, which are small, medium and large nitrogen generators. During operation, it merely filters out the oxygen from the air to obtain pure nitrogen, so from the point of view of technical characteristics, the nitrogen generator has no great danger. However, in the final analysis, the nitrogen generator is a kind of "container", and the definition of pressure vessel in the "Special Equipment Safety Law" is that the pressure is not less than 0.1 MPa under the design pressure. Therefore, the nitrogen generator meets the definition of "pressure vessel" and can be regarded as a special equipment.