This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of CZY type marine self-priming centrifugal oil pump (hereinafter referred to as oil pump). This standard applies to self-priming centrifugal oil pumps used to transport gasoline, kerosene, and light diesel oil for ships, and also applies to seawater pumps and fresh water pumps where the temperature of the transport medium is not higher than 80°C.