2 3/8"-5" inch API 5DP Drill Pipe For Sale: Grade:DZ50,E75,X95,G105,S135 OD:60mm-127mm Thinkness: ... Details:2 3/8"-5" inch API 5DP Drill Pipe For Sale :Grade: DZ50,R780,E75,X95,G105,S135Material:40Cr,45Mn2,35CrMo ... manufacturer of drill pipes in China and has its own plant.2. Longway has advance production lines, adopts to American equipment ... mm 2 3/8"-5" inch API 5DP Drill Pipe For Sale