Drill Pipe Standards and technical conditions for supply:API SPEC 5DP Grade: E75, X95, G105, S135 . The wear-resistant belt of tool joint: Arnco 100XT, 200XT, 300XT, 400XT Internal coating drill pipe: TK34, DPC, TC2000, TC3000 Usage: Mine blasting, water well drilling, geothermal wells drilling, fore poling, coal and nonferrous metal mining projects, etc.