In Line Inspection Methods

• Caliper and Geometric In-line Inspection “PIG’s”
• Caliper PIG’s carry electro-mechanical sensors to determine the geometric
  properties of a pipeline: measuring dents, bulging, buckling, and other geometric deformations.
  Caliper pigging is also used for location mapping and the geographical positioning of pipeline features.
• Magnetic Flux Leakage (MFL) In-line Inspection “PIG’s”
• Magnetic Flux Leakage (MFL) PIG’s use powerful magnets to magnetize the pipe wall to saturation. Tri-axial hall sensors measure magnetic flux leaking from defect sites.
• Ultrasonic (UT) In-line Inspection “PIG’s”
• Ultrasonic (UT) ILI PIG’s measure metal loss, corrosion, cracking, and gouges in a pipeline by direct measurement of ultrasonic pressure waves inside the pipe wall.
  These waves provide information that can be used to measure remaining wall
  thickness or detect and size cracking.
  Ultrasonic ILI PIG Configurations include UT Rotary (UT-R), UT Multi-Channel Ring (UT-MC Ring), UT Multi-Channel Octopus (UT-MC Octopus), and UT-CS Hawk Crack Detection, Sizing, and Monitoring (UT-CS Hawk).