This document specifies the terms and definitions, classification and basic parameters, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and Storage and quality commitment. This standard applies to plunger pumps in metallurgy, forging, shipbuilding, petrochemical industry, geology and mining and other related fields, which use hydraulic oil or other liquids with equivalent performance as the working medium and have a rated pressure not greater than 45 MPa.