
Near Field Testing (NFT)
Inspection of carbon steel fin-fan and air-cooler tubes for inside-surface corrosion, erosion and pitting.

Near Field Testing (NFT) is used on carbon steel fin-fan and air-cooler tubes, detecting inside-surface corrosion, erosion, and pitting. It delivers results quickly without the need for complex calibration.
NFT excels at locating ID-side damage near the tube sheet, making it ideal for air-finned cooler bundles where rapid screening of hundreds of tubes is required during a tight turnaround window.
Near Field Testing (NFT) in Action
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Near Field Testing (NFT) Available Near You
TechCorr mobilizes certified crews from 14 offices across North America — every service is available everywhere, with rapid regional response from the office nearest your site.
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See how TechCorr applies asset integrity management expertise across the energy and industrial sectors we serve.
