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Evaluating Cracks and Dents with Damage in Pipelines
The course content as outlined below is being offered through Clarion Technical. Follow this link to the Clarion website for information on the next scheduled upcoming dates and locations and to register http://www.clarion.org/conferencesDate.php
Various forms of cracks, crack-like indications and long seam weld anomalies are
known to be present in pipelines, which can become a safety concern over the
operational life of the pipeline. The most typical forms of cracking are Manufacturing
Related (such as lack of fusion, cold welds and hook crack-like), Operational Driven
(fatigue cracks initiating at imperfections or dents) and Environmentally Assisted
(stress corrosion cracking, hydrogen-induced cracking and corrosion fatigue
cracking).
This course will cover in greater depth the formation and conditions that drive crack
growth until they become unstable, leading to leaks or ruptures. The appropriate
assessment methods such as ILI tools, pressure testing and direct assessments will be
reviewed as well as traditional and current engineering methods for determining
crack severity for response and remediation. Each attendee will receive a
complimentary Excel based crack assessment calculator which will be demonstrated in
class using practical case studies. It will be necessary to bring a laptop to this course.
1. Characteristics and Behavior of Cracks in Pipelines
2. Foundations of Engineering Fracture Mechanics
3. Performing Engineering Analyses of Cracks
4. Evaluating Dent Fatigue Behavior
5. Integrity Assessments for Addressing Cracks and Dents
6. In-Ditch Non-Destructive Evaluation (NDE) and Repair Methods
FATIGUE AND FRACTURE PERFORMANCE OF PIPELINES
Fatigue analysis and fracture behavior evaluations are important considerations for predicting and demonstrating the future structural integrity of pipelines. Fatigue failures of energy pipelines are governed mainly by the magnitude and frequency of the operational cyclic pressures, fracture behavior (brittle or ductile), initial crack shape and size, fracture toughness and residual deformation stresses. In fatigue analysis, any deficiency in considering the interrelationship of these factors can result in unreliable predictions or overly conservative results.
Chapter 1: Common Definitions and Concepts in Fatigue Analysis
Chapter 2: Pipeline Fracture Behavior
Chapter 3: Characterization of Variable Cyclic Pressure Data
Chapter 4: Performing Pressure Cycle Fatigue Crack Growth Analysis
Chapter 5: Evaluating Dent Fatigue Performance
Chapter 6: Validating Fatigue Crack Growth Life Predictions