Methods For Inspecting Heat Exchanger Tubes

Nov 20, 2024 Leave a message

  • Eddy current detection technology (ECT)

Eddy current testing technology (ECT) inspects non-ferromagnetic fittings in a non-contact manner. This technique is suitable for detecting and quantifying discontinuity defects such as corrosion, erosion, abrasion, pitting, folding plate cuts, wall thickness loss, and cracks in non-ferrous metallic materials.

  • Far Field Detection Technology (RFT)

The Remote Field Testing (RFT) technique is currently being successfully applied to the inspection of fittings made of ferromagnetic materials such as carbon steel or ferritic stainless steel. The technique has excellent sensitivity in detecting and measuring volumetric defects originating from erosion, corrosion, wear and folding plate notches.

  • Magnetic leakage detection technology (MFL)

Magnetic Flux Leakage (MFL) is a fast inspection technique suitable for measuring wall thickness loss and detecting more obvious defects such as pitting, notching and circumferential cracks. The use of the MFL technique to inspect aluminium finned carbon steel fittings is very effective as the magnetic field is almost completely unaffected by these fins.

  • Near Field Detection Technology (NFT)

Near Field Testing (NFT) technology is a fast, cost-effective solution tailored specifically for the inspection of finned carbon steel fittings. This new technology relies on a simple driver-pickup eddy current probe design that makes signal analysis easy and simple. nft technology is particularly well suited to detecting corrosion, erosion or pitting on the inside walls of carbon steel fittings. the nft probe measures the lift-off value or 'fill factor' and then converts this value into an amplitude-based signal (no phase analysis is required). ). Since the depth of eddy current penetration is limited to the inner surface of the tubing, the shape of the fins and fans on the outside of the tubing have no effect on the NFT probe.

  • Rotational ultrasound technology (IRIS)

The Ultrasonic IRIS option is used to inspect fittings made of a variety of materials including ferrous, non-ferrous and non-metallic materials. This technique detects and quantifies pipe wall loss due to corrosion, erosion, abrasion, pitting, cracks, and folding plate cuts.