Subsea NDT Technologies

ART – Acoustic Resonance Technology

The advantages of acoustic resonance technology (ART) have long been recognised in the subsea inspection marketplace. The technology—with its coating penetration and accuracy capabilities for through-wall inspection of pressure holding equipment—is well suited to detect mediums. TSC Subsea’s ART is deployed remotely via our ARTEMIS™ system to provide unique external inspection of subsea assets, including rigid and flexible pipelines, flowlines and risers.

ACFM – Alternating Current Field Measurement

For 30 years, alternating current field measurement (ACFM) electromagnetic inspection technology has been the method of choice for detecting and sizing subsea surface-breaking cracks. Recognized and approved by many certification bodies, including DNV, ABS and Lloyds, the technique has been used successfully to supersede traditional non-computerized and more user-dependent methods, such as magnetic particle inspection (MPI).

PEC – Pulsed Eddy Current

Corrosion under insulation is possibly the greatest unresolved asset integrity problem in the industry. Adding a subsea environment to that increases the challenge ten-fold. Current methods for measuring wall thickness over insulation (liftoff) without removing it all have severe limitations. TSC Subsea’s exclusive ROV-deployed subsea Eddyfi Lyft® and high-resolution array probes provide a high-performance solution that reinvents pulsed eddy current (PEC).

SPA – Subsea Phased Array

Collaborating closely with its business associates, Eddyfi Technologies, TSC Subsea has successfully introduced the numerous advantages of Phased Array technology to the realm of subsea inspection. The innovative Subsea Phased Array (SPA™) system seamlessly integrates traditional PAUT and ToFD techniques while also incorporating advanced applications utilizing the latest technological advancements in TFM (Total Focusing Method).

Our services

Subsea Structures

Splash Zone

Vessels and FPSOs

Flexible Risers

Pipelines

Grouting

Case Studies

ARTEMIS: Through-Coating Inspection for Large-Diameter Subsea Pipelines.

Dec 2, 2025

A primary objective was to assess areas expected to become dead legs as a result of future pipework rearrangements. These dead legs, along with the commingling point for flow back to Nyhamna, have been assessed as susceptible to Flow-Assisted Corrosion (FAC),...

ARTEMIS: Through-Coating Inspection for Large-Diameter Subsea Pipelines.

A primary objective was to assess areas expected to become dead legs as a result of future pipework rearrangements. These dead legs, along with the commingling point for flow back to Nyhamna, have been assessed as susceptible to Flow-Assisted Corrosion (FAC),...

ARTEMIS: Through-Coating Inspection for Large-Diameter Subsea Pipelines.

A primary objective was to assess areas expected to become dead legs as a result of future pipework rearrangements. These dead legs, along with the commingling point for flow back to Nyhamna, have been assessed as susceptible to Flow-Assisted Corrosion (FAC),...

vCompact™ in Action: Corrosion Mapping & Weld Integrity Assessment of Subsea Pipelines.

A leading offshore operator in the South China Sea relies on a network of subsea pipelines and flowlines to transport oil and gas from wells to its production facilities. Over the years, these pipelines have been at risk of saltwater corrosion, mechanical stress, and...

Subsea Pipe Bend Inspection with ROV-Deployed Crawler and Phased Array Technology.

Introduction TSC Subsea was approached by a long-standing client, DeepOcean, acting on behalf of Repsol Norge AS, to conduct a diver-less, ROV-deployed inspection of multiple subsea pipe bends and T-sections of varying diameters. The inspection was to take place in...

Rapid Hydrate Plug Detection Solution for Subsea Pipelines.

Introduction In the deep waters off the coast of Angola, a major offshore operator faced a significant flow assurance issue with one of its 12-inch gas gathering flowlines. The suspected culprit? Hydrate plug. Hydrate formation is a major flow assurance concern for...

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