... The material of drill pipe body are chosen by 1&3 group of API 5D. Applied standard:API SPEC 7 ... flat-sideD/ODgradethicknessthickening of the formLb/ftKg/minmmin mm2 3/86.656.269.322.37560.3E,X,G,S0 ... G,S0.3689.35inside or outside the thickening thickening3 1/215.5014.6321.793.50088.9E0.44911.40inside ... or outside the thickening thickening3 1/215.5014.6321.793.50088.9X,G,S0.44911 ...