This standard specifies in detail the classification, technical requirements, test methods and inspection rules of marine high voltage piston air compressors. It is applicable to the design, production and acceptance of high voltage air compressors driven by electric motors or diesel engines with rated exhaust pressure ranging from 15 MPa to 40 MPa. The standard also covers marking, Encasement, transportation and storage requirements to ensure the safety and Reliability of equipment throughout its life cycle. Relevant material standards and test methods such as GB/T 699 (high quality carbon structural steel) and GB/T 3853 (positive displacement compressor acceptance test) are cited to provide a comprehensive technical basis.