Tube Inspection Solutions

Eddy Current Testing (ECT) — Non-Ferrous Tubes

Multi-frequency bobbin probe ECT for copper alloys, titanium, austenitic stainless steel, and Inconel tubes. Detects wall thinning, pitting, SCC, baffle cut wear, and tube-end degradation across the full tube length in a single pass. Fast, high-sensitivity, and the standard primary screening technique for non-ferrous heat exchanger and condenser tubes.

Internal Rotating Inspection System (IRIS) — All Materials

Immersion UT with rotating transducer for direct wall thickness measurement in ferrous and non-ferrous tubes. Provides quantitative remaining wall data for fitness-for-service calculations where ECT amplitude-based sizing carries insufficient accuracy. Used as primary inspection for carbon steel tubes requiring direct measurement, and as confirmation technique for significant ECT indications.

Magnetic Flux Leakage — Tubes (MFL) — Ferrous Tubes

High-speed MFL for carbon steel and low-alloy steel heat exchanger and boiler tubes. Detects wall loss, pitting, and baffle damage across large ferrous tube bundles at inspection rates that IRIS cannot match within typical outage windows. The primary screening tool for ferrous tube populations where RFET is not specified.

Remote Field Eddy Current (RFET) — Ferrous Tubes

Low-frequency RFET for carbon steel, cast iron, and ferritic stainless steel tubes. Equal sensitivity to inner and outer wall defects without magnetic saturation. The specified technique under ASTM E2096 for ferromagnetic heat exchanger tube inspection where ECT's ferromagnetic limitations make standard bobbin probe inspection unreliable.

A tube inspection programme for a complex plant with multiple heat exchangers — spanning different materials, wall thicknesses, service conditions, and damage mechanisms — requires technique selection to be made at the bundle level, not applied uniformly across the facility. Our tube inspection engineers review the heat exchanger register, tube material specifications, operating history, and previous inspection records before designing the technique deployment matrix for each bundle. The result is an inspection programme that uses the right technique for each tube population — and integrates screening and confirmation techniques to deliver both coverage and accuracy within the available inspection window.