Underwater magnetic particle inspection aids platform repairs
Owing to their present accuracy and cost-effective procedures, nondestructive testing techniques offer an immediate answer to the pressing need for routine inspection and preventive maintenance of offshore structures. With magnetic-particle inspection, a diver releases a premixed solution of magnetic particles onto a structure's metal surface between the poles of an applied magnetic field, usually in areas adjacent to welds. The magnetic field gathers the fluorescent particles into surface cracks, which then become visible. Putty strips applied to cracks make a casting of the fissure that can be brought to the surface for examination. Where greater penetration of the metal surface is necessary, ultrasonic testing offers a complimentary approach to the magnetic-particle procedure. This method detects subsurface voids and stress fissures but is of limited use for detecting surface defects.
- OSTI ID:
- 6034429
- Journal Information:
- Ocean Ind.; (United States), Vol. 14
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
03 NATURAL GAS
OFFSHORE PLATFORMS
INSPECTION
MAINTENANCE
MAGNETIC FIELDS
NONDESTRUCTIVE TESTING
PARTICLE INTERACTIONS
REPAIR
TESTING
ULTRASONIC TESTING
UNDERWATER OPERATIONS
ACOUSTIC TESTING
INTERACTIONS
MATERIALS TESTING
423000* - Engineering- Marine Engineering- (1980-)
020300 - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing