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PR-631-174506-R01 Substandard Properties in Pipeline Fittings and Flanges
Abstract
Some instances of substandard high yield (42-80 ksi) fittings and flanges have been reported over the past few years in Canada and the USA. In response, PRCI launched project MAT-7-1 to investigate some of the potential metallurgical causes of this issue. The main activities in this project included a survey of operators and manufacturers, a review of the scientific literature pertinent to the metallurgy of fittings and flanges, a critical review of the relevant MSS and CSA manufacturing standards, as well as a summary of proposed changes for MSS-SP-44 that have been recommended by API Sub Committee 21 (Materials work-ing group on pipeline flange and fitting quality).
The report provides information, which should be useful for operators and manufacturers on the metallurgy pertinent to the manufacturing of fittings and flanges. The information should also help to improved stand-ard practices, as well as the quality and reliability of pipeline fittings and flanges.
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PR-631-174506-R01 Substandard Properties in Pipeline Fittings and Flanges
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