Alternating Current Field Measurement (ACFM)
ACFM is widely used for detection and sizing of surface-breaking cracks in
structures such as oil and gas platforms, process plant, pressure vessels,
storage tanks, bridges and theme park rides. It is used for general area
inspection, thread inspection, applications at high temperatures or in
radioactive environments, but its main use remains the inspection of welds,
particularly in ferritic steel.
ACFM has a number of advantages over conventional techniques for weld
inspection including:
