Large Stand-Off Magnetometry (MMM Technology)

Petromaster is the sole service provider for this technology in the GCC. The system is based on the detection of Self Magnetic Leakage Fields (SMLF), which arise in ferromagnetic and paramagnetic materials due to the accumulation of high-density dislocations, enabling detection of High Stress Concentration Zones (SCZs).

This technology can be used on both contact and non-contact bases to assess internal and external conditions of ferromagnetic piping and pipelines. It is suitable for bare, insulated, and buried pipelines. When combined with Risk Based Inspection (RBI), it helps optimize selection of On-Stream Inspection (OSI) locations for targeted monitoring.

Metal Magnetic Memory (MMM) refers to the residual magnetization formed in components and welded joints during fabrication and operation. Most failures originate in Stress Concentration Zones (SCZs), which are areas of maximum stress compared to nominal conditions. These zones are primary locations for corrosion, fatigue, and creep damage.

Early detection of SCZs is essential for evaluating equipment integrity, preventing failures, and estimating remaining service life. MMM utilizes natural magnetization and its after-effect, appearing as magnetic memory of metal under stress and structural change.

The method detects residual magnetization formed during manufacturing, cooling, or during operation due to irreversible changes in local magnetization caused by stress concentration and material degradation.

International Standards

Applications of MMM Technology

Advantages of MMM Technology