... RP, RPI, HP, UHP used for arc furnaces Graphite Electrodes:-grade:RP, RPI(HD), HP, UHP-dia. ... :500-2700mm;-nipple: 3TPI, 4TPI, 4TPI long;-high conductivity-high bulk density-low electrical resistance-low ash-good resistant ... ≤0.40.30.30.20.3*male-female graphite electrodes: we can produce other grade also according to ... to meet with customer’s requirements. Graphite Electrodes with grade RP RPI HP UHP