1. Drill Pipe Manufacturing Flow Chart
25
Upsetting Heat
Treatment
Straightening
Magnetic
Particle
Inspection
Inspection for
Longitudinal Defect
Transverse Defect
Wall Thickness
Forging Heat
Treatment
Threading Hardbanding
(optional)
Flash
Removal
Hardness
Check
Wet Magnetic
Particle and
Ultrasonic Inspection
Finishing and
Final Inspection
Internal
Plastic Coating
(optional)
Shipping
Friction
Welding
Heat
Treatment
of Weld
Magnetic
Particle
Inspection
ASSEMBLY
Phos
Coating
Make-and-Break
(optional)
Alignment
Inspection
Pipe Body
Tool Joint
Drill pipe is manufactured to customer requirements and, where applicable, to specifications
such as API, ISO, NS1, DS1, IRP, etc. It is inspected 100% after completion.
Unitesteel www.gaslinepipe.com sales1@shunitesteel.com www.shunitesteel.com