Magnetic Particle Testing in Offshore: What It Finds, What It Misses, and What Governs It
What MT is actually used for in offshore
Fatigue is the offshore mechanism, and MT finds it — node welds, conductor guides and crane pedestals are examined on rotation because cyclic loading never stops.
How MT works
MT magnetises a ferromagnetic component and applies iron particles, which gather at the flux leakage a surface-breaking or near-surface discontinuity creates. It is fast, inexpensive per square metre, and unusually good at what it does: finding cracks in steel that a visual examination would miss.
What MT will not do
What MT will not do: work on non-magnetic material at all — no stainless austenitics, no aluminium, no nickel alloys — and it finds nothing meaningfully below the surface. Coatings degrade sensitivity, and flaws parallel to the flux direction are invisible, which is why examination in two directions is standard practice rather than diligence.
The offshore assets this applies to
Platform topsides and process modules, structural jackets and risers, subsea infrastructure, and FPSO hulls and turrets.
The damage mechanisms driving the examination
Fatigue is the defining mechanism — wave loading cycles structural nodes continuously — with seawater corrosion, splash-zone attack, and CUI on topside process equipment.
What governs acceptance
Class societies and, in the US Gulf, BSEE regulation; API RP 2X-family guidance for structural examination; operator standards above all of it. Access and weather windows shape scope as much as the code does. On the method side: ASME Section V Article 7; AWS D1.1 for structural work; ASTM E1444 in aerospace and general industry; ASTM E709 as the practice reference. An examination that is technically sound but performed outside the governing regime is not an examination anyone will accept, which is why the code family matters as much as the technique.
How Atlantis delivers MT in this sector
Atlantis mobilises examination teams to your site under Atlantis procedures with ASNT Level III oversight — we do not claim a depot or laboratory in every market, and say so plainly. What you receive is the examination performed to a qualified procedure, findings evaluated against the acceptance criteria your contract names, and records structured to survive a client audit years later.
Magnetic Particle Testing services · MT training and certification · Offshore programme consulting · Offshore NDT training · scope a MT examination.
MT in other sectors
Refining · Petrochemical · LNG · Pipeline · Marine & Shipbuilding · Aviation & Aerospace.