Pipeline Safety Through Combined Ultrasonic In-Line Inspection

Threat detection and identification is key to managing pipeline safety. According to industry standards, specific pipeline threat root causes are grouped into three categories:

  • Time-dependent threats
  • Time-independent threats
  • Resident threats

Prevention, detection and mitigation of specific threats such as corrosion, cracking or excavation damage are considered by operator integrity programs. These include complex routines to assess if two or more threats of a different nature occur coincidentally and independently of each other.

Coincident and interacting threats in a pipe segment can result in an increased chances of pipeline failure. Although an individual threat may not be of major concern, the condition might be critical for safe operation of the same pipe segment if multiple types of threats are present and interacting at the same location.

Challenging Interacting Threats

NDT Global delivers the most accurate and reliable ultrasonic in-line inspection service available today. Dedicated inspection tools and technologies have been developed that allow assessment of isolated as well as interacting pipeline defects. Two or more inspection technologies can be customized in a combined tool configuration for a single inspection tool run saving operational costs and enabling evaluation of interacting threats at the same time. Multiple data sets are gathered by a combined high-resolution inspection capturing e.g. both the geometry of the pipe and metal loss defects. Data analysis at NDT Global utilizes the acquired data sets by means of combined analysis processes. Enhanced detection and identification of interacting threats is enabled as the data sets complement each other and are fully aligned. Combined reporting on e.g. corrosion or cracks associated with dents, wrinkles or buckles helps to prioritize and manage interacting threats in pipelines today.