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Title: Drop-weight tear test application to natural gas pipeline fracture control
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Catalog No.: 2296s
Date of Publication: 2013-09-01
Price: $25.00 US
Authors: Dr Robert Eiber
Abstract: THE DROP-WEIGHT tear test (DWTT) has had a significant positive impact on the fracture properties of linepipe steels. This review summarizes the incidents that started the research leading to the development of the DWTT from 1960 to present. The initial driver for the development of the test was an incident that involved 8.3 miles (13.3 km) of brittle fracture during pre-service testing of a natural gas pipeline with gas. The initial goal of the DWTT was to accurately define the ductile-to-brittle transition temperature of pipeline steels to facilitate the specification of transition temperatures below the operating temperature range for linepipe. As the pipeline industry used the low-transition temperature steels, the need for a measure of the steel toughness emerged to control ductile-fracture propagation arrest leading to examination of the DWTT energy as a substitute for the Charpy V-notch energy which had been identified as the way to define the steel fracture toughness.
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