Graphite Electrode

Graphite electrode is a major conduction materials used in the electric smelting industry, as the electric arc furnace (LAF) and ladle furnaces (LF) smelting steel, the submerged-arc furnace producing ferroalloy, pure silicon, phosphor, matte, calcium carbide, ect. , and the electric resistance furnace as graphitization furnace producing graphite electrode, glass melting furnace, electric furnace producing carbofrax, ect. There are three type graphite electrodes, NP (RP), HP, UHP, with corresponding 4 & 3 thread per inch (TPI) Nipples to suit.
Specifications & Allowance of Graphite Electrodes
Diameter mm Length mm
Nominal Diameter Actual Diameter Nominal Length Allowance
mm inch Max Min Length Short Dimension
75 3 78 73 1000/1200/1600 +50
-75 -225
100 4 103 98
130 5 132 127
150 6 154 149 1600/1800 ±100 -275
200 8 205 200 1600/1800
225 9 230 225 1600/1800 ±100 -275
250 10 256 251 1600/1800 ±100 -275
300 12 307 302 1600/1800
350 14 357 352 1800/2000/2200
400 16 409 403 1800/2000/2200 ±100 -275
450 18 460 454 1800/2000/2200/2400
500 20 511 505 1800/2000/2200/2400
550 22 562 556 1800/2000/2200/2400 ±100 -275
600 24 613 607 2000/2200/2400/2700
650 26 663 657 2400/2700
700 28 714 708 2400/2700 ±100 -275
800 32 815 809 2400/2700