graphite electrode with grade RP, RPI, HP, UHP used for arc furnaces Graphite ... : 3TPI, 4TPI, 4TPI long;-high conductivity-high bulk density-low electrical resistance-low ash-good resistant of oxidation,heat shock & impact ... according to customer’s requirements.*we can produce to meet with customer’s requirements. Graphite Electrodes with grade RP RPI HP UHP