A crude oil pipeline in Canada presented a particularly challenging scenario for NDT Global. Short, branched axial cracks located close to the girth welds had been observed. But these attributes created depth-sizing complexity for ultrasonic inline inspectionA method used to assess the the integrity and condition of pipelines. It involves the use of specialized tools that are inserted into the pipeline and propelled… tools. The assessment of such atypical flaws called for highly innovative techniques and an out-of-the-box approach.  Against this background, experts from NDT Global worked closely with the customer to develop the best-fit solution. The goal was to gain greater insight into the nature of the cracks while overcoming the sizing limitations of conventional inspectionThe systematic process of visually examining, testing, or monitoring pipeline components to assess their condition, integrity, and compliance with regulatory re… technology. To this end, a series of analytical tests and experimental assessments were performed.

• In-depth insight into crackA fracture or discontinuity in the wall of a pipeline, where the material is separated or broken, potentially compromising the integrity and safety of the pipel… complexities which were found to arise from the short crack lengths and close proximity to girth welds

• Full-scale pull-testing program to establish the inspectionThe systematic process of visually examining, testing, or monitoring pipeline components to assess their condition, integrity, and compliance with regulatory re… toolGeneric term signifying any type of instrumented tool or pig.’s sizing and detection capabilities

• Laboratory non-destructive experiments to better understand the impact of crackA fracture or discontinuity in the wall of a pipeline, where the material is separated or broken, potentially compromising the integrity and safety of the pipel… orientation on sizing