NFA INSPECTION
KAOTHEEM offers NFA tubular inspection services to inspect the ID of carbon steel fin-fan tubes. NFA tubular inspections use multiple individual coils grouped together instead of the single coil used in standard near-field testing (NFT). NFA uses two rows of receiver coils to provide 360º coverage of the ID of finned tubes.
IN COMPARISON TO NFT INSPECTIONS, NFA:
- Collects data for a larger tube area in a single pass.
- Is more sensitive to ID small volumetric flaws.
- Is better at sizing ID flaws.
- Is more sensitive to circumferential cracks.