... RP Graphite Electrode Grade: RP, HD, HP,SHP, UHP Diameter: 50--600mm Length available:48"/60"/72"/84"/96" Product Name: RP Graphite ... ElectrodeGrade: There are four types of graphite electrodes made in Sanli Carbon: RP, PI grade, HP, and UHP.Technical Parameter:Graphite electrode ... , corrosion resisting and wear resistance, graphite electrodes (RP ,HP ,UHP) are widely used in steel-making, ...