The Materials and Construction (M&C) Defects Chapter covers such features without regard to if or how they might grow in service, or interact with other types of defects. This QR Segment provides a brief introduction to other M&C defects, whereas aspects related to how such defects might grow have been addressed in the Degradation and Cracking Segment.  This Degradation and Cracking Segment considers general corrosion, fatigue, selective-seam-weld corrosion and/or cracking, and another form of environmentally assisted cracking termed stress-corrosion cracking. That Segment includes a video, which is supported by extensive related discussion concerning kinetics and re-validation intervals.

Readers that are interested further discussion concerning pipeline M&C defects can find a brief video dealing such features below:

video: Failure Analysis – Defects