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Title: Case study of a reinforcement to a mismatched girth weld in a 48-in diameter gas pipeline using a composite wrap
Category: Pigsource Papers
Downloadable: Yes 
Catalog No.: pg3547
Date of Publication: Oct 1 2009 12:00AM
Price: $25.00 US
Authors: Alan Morton
Abstract: A pipeline owner operates a network of large diameter pipelines in the production and transportation of natural gas. Within this infrastructure near a compressor station is a 48┬Činch pipeline made from API X70 pipe with 1.125-inch wall. The system successfully completed the hydrostatic test and was in service delivering natural gas at 940 psi. Inspection revealed that during construction a 0.433-inch mismatch at a girth weld had occurred. The pipeline owner analyzed the weld area and determined the conditions to be safe for the 940 psi operating pressure.
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