This standard specifies the product model, technical requirements, test methods, inspection rules, marking, Encasement, transportation and storage of epoxy less solvent impregnating materials. The scope of application includes E-type epoxy resin and vegetable oil anhydride dissolved in organic solvents. Class B epoxy less solvent impregnating materials with solids by volume not less than 70%. The standard refers to a series of GB standards, including test methods for solvent insulating paints, inspection, Encasement, marking, general rules for storage and transportation, and technical conditions for heat-curing impregnating materials. The test method covers Appearance, Viscosity, solids by volume, flash point and other indicators, as well as the thick layer curing ability of the paint, Stability and the evaluation of the effect of enameled wire.