Applied standard:API SPEC 7 drill pipe tool joint
API SPEC 5D Drill pipe specification
SY/T 5561-92 Friction welding pipe welding zone technological conditions
Pipe joints and tube body strictly according to the selection criteria,for welding
zone work procedure complete on C-132-J Friction welding machine, for welding parts carry on quenching and annealing after welding,hardening and tempering
treatment. Each performance index and the specification request must be achieved related standard.