Introduction

Several sections of the Materials and Construction (M&C) Defects Chapter have illustrated M&C defects and discussed briefly at a high level pipeline loadings other than pressure that can lead to failure at such defects – where loadings is used in a generic sense. Loading aspects were considered in the QR Segment titled Components and Loads. This QR Segment considers the properties aspects and the underlying failure mechanisms, providing background concerning ductile and brittle modes of cracking, and the role of the pipe’s properties in regard to collapse-controlled and fracture-controlled failures. These mechanical and fracture properties quantify the resistance of the line pipe to collapse and fracture at defects. This is accomplished through use of a video that can be accessed below:

video: Failure Analysis – Strength and Fracture Properties

Click here for information concerning pipeline Components and Loads.