The effect of weld metal matching on girth weld performance: Volume III - an ECA analysis. Final report
- Universiteit Gent (Belgium). Laboratory Soete for Strength of Materials and Welding Technology
Modern pipeline standards contain alternative methodologies for determining the acceptable defect size in pipeline welds. Through the use of fracture mechanics and plastic collapse assessments, the mechanical and toughness properties of the defective region relate to the applied stress at the defect and defect geometry. The assumptions made in these methodologies are not always representative of the situation accurring in pipeline girth welds. To determine the effect of the various input parameters on acceptable defect size, The Welding Supervisory Committee of the American Gas Association commenced in 1990, in collaboration with the Laboratorium Soete of the University Gent, Belgium, a series of small scale (Charpy V impact and CTOD) and large scale (fatigue pre-cracked wide plate) tests. All the experimental investigations were intended to evaluate the effects of weld metal mis-match, temperature, defect size, defect type, defect interaction, pipe wall thickness and yield to tensile ratio on girth weld fracture behaviour. The aim of this report was to determine how weld metal yield strength overmatching or undermatching influences girth weld defect size prediction. A further analysis was conducted using the newly revised PD6493:1991 to provide a critical analysis with the objective of explaining the behaviour of the wide plate tests.
- Research Organization:
- American Gas Association, Inc., Arlington, VA (United States). Pipeline Research Committee
- Sponsoring Organization:
- American Gas Association, Inc., Arlington, VA (United States)
- OSTI ID:
- 10118262
- Report Number(s):
- AGA-95006552; ON: UN95006552; CNN: Contract PR-202-922; TRN: 95:002256
- Resource Relation:
- Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
42 ENGINEERING
36 MATERIALS SCIENCE
WELDED JOINTS
FRACTURE MECHANICS
YIELD STRENGTH
PERFORMANCE TESTING
PIPELINES
WELDING
ALLOYS
PIPES
FATIGUE
CRACKS
STRESS INTENSITY FACTORS
DEFORMATION
CHARPY TEST
IMPACT TESTS
FRACTURE PROPERTIES
TEMPERATURE DEPENDENCE
022000
032000
420205
360101
TRANSPORT, HANDLING, AND STORAGE
TRANSPORT AND STORAGE FACILITIES
PREPARATION AND FABRICATION