Stress Concentration Tomography Services (SCT) PART 3: FUNDAMENTAL PRINCIPLES

Posted on
July 10, 2019 by

PART 3: FUNDAMENTAL PRINCIPLES

SCT™ provides high-resolution information on the wall condition of an underground pipeline. It detects all mechanical and metallurgical defects such as cracks, internal and external corrosion, and pipeline deformations caused by land movement. It also collects real-time data of the pipeline’s depth of burial underground.

During an SCT™ inspection, a technician carries the UNISCAN™ Scanner directly over the center of the pipeline. The scanner passively collects magnetic data of the pipeline underground; there is no need to induce energy into the pipeline, turn off CP systems, or change the pipeline operating pressure during inspection.

Upon completion of the field survey, Speir Hunter’s patented software analyses the pipeline magnetic data using complex algorithms that can decipher the mathematical relationship between material stress and magnetisation. The software reports the location of all abnormal zones of localized stress in the pipeline wall material by analyzing changes in the pipeline magnetic data. We call such areas ‘Stress Concentration Zones’ (SCZs).

Figure:  SCT™ (Stress Concentration Tomography) collects data on the pipeline’s latent
magnetic field remotely in order to assess the pipeline wall condition.


3-D Line Locating Ltd is a privately owned Buried Pipeline and Utility Locating, Hydrovac Services and Ground Disturbance Management company. For over 20 years, we have been at the forefront of the Damage Prevention industry in Western Canada. Although the industry has changed significantly over the last 20 years, we have been very fortunate to have been at the leading edge of the evolution and still maintain the highest levels of quality, accuracy, consistency and customer satisfaction in our industry.

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