1.OD:2 3/8"-6 5/8" 2.Grade:E,X,G,S ... EU,IEU 4.HB:Arnco100XT,150XT,300XT, Botn1000,3000 5.IPC:TC2000,TK34 For more than 40 years, ... tools including Drill Pipe, Drill Collar, Heavy Weight Drill Pipe, Kelly,Pup Joint and so on. Our API drill pipes ... threads are machined by CNC Lathes and inspected with API Spec standard thread gauges. To improve the galling- ... Certificates and so on. 2 3/8--5 1/2 drill pipe