... Pipe 1.OD:3 1/2,4",4 1/2",5",5 1/2" 2.Steel grade: E75,X95,G105,S135 3.MOQ: ... 25 tons 4.Certificates : API 5DP,API7-1 Main feature: A. The drill rods ... are determined according to the requirements of Group 1 & Group 3 of API SPEC 5D. C. Drill pipe ... impact resistance E. Good corrosion resistance Hardbanding Feature: A. Good balance between antiwear and friction-reduction B. ...