This standard specifies all aspects of medium and high voltage reciprocating piston air compressors, including terms and definitions, models, basic parameters, requirements, test methods, inspection rules and labels, Encasement and storage. It is suitable for air compressors with a rated power of 1.1 kW to 630 kW and a rated exhaust pressure of 1.6 MPa to 45 MPa driven by electric motors. Likewise, it is also suitable for air compressors with a rated exhaust pressure of 1.6 MPa to 45 MPa without a drive motor when they leave the factory. Air compressors with a rated exhaust pressure of 1.6 MPa to 45 MPa driven by internal combustion engines or a motor with a rated power greater than 630 kW can be referred to for implementation. However, this standard does not apply to special-purpose air compressors such as vehicles, ships, and blow molding machines.