The outside surface of the tube is visually examined to locate visible, injurious defects.
Magnetic Particle Inspection (MPI)
A transversely oriented magnetic field is induced into the tube and iron powder applied to its outside surface. The powder is attracted to areas of variation in the magnetic field created by longitudinal or three dimensional defects, thus outlying the defects. Depth of the defect is then determined by grinding to the point of maximum penetration and measuring with an accurate depth gauge. The tube is marked and classified as under API Spec.
MPI for Special Upset of High Strength Materials
This inspection locates injurious defects in the end areas of this material. Utilizing AC-YOKE magnetizing equipment longitudinal and transverse magnetic fields are induced into the end areas to detect defects regardless of orientation. Careful magnetic particle inspection is performed on the outside surface. Sandblasting is recommended for most sensitive inspection.
Magnaflux Inspection of End Areas
This inspection detects all defects extending to the surface and representing external damage or actual parting material inspection procedure.
API Drifting (Full Length)
Drifts according to API standards are applied to insure specified I.D. dimensions
Ultrasonic Wall Thickness Spot Test
Ultrasonic spot checks are made to determine the wall thickness along a helical path or in specified areas.
Visual Thread Inspection
Thread Inspection with API Thread Gauge
Pins and coupling are measured for compliance with API Spec.
Manual Thread Repair
Hardness testers are employed to determine pipe hardness
Internal Cleaning (Full Length)
Removal of scale rust and other deposits with rotary metallic brushes.
External Cleaning (Full Length)
Removal of external scale rust and other deposits with rotary metallic brushes.
Inspection After Machine Shop Repair
Dimensional inspection and Magnetic Particle Inspection performed to API Specifications of dimensions