GRADE 550 LINE PIPE PASSES TESTS FOR CANADIAN PROJECT

Keith E. W. Coulson, Russell J. Young NOVA Corp. of Alberta Calgary Hiroaki Tsukamoto NKK Fukuyama, Japan Tests by NOVA Corp. of Alberta, Calgary, on Grade 550 pipe have led to the world's first specified use of the high-strength material in a large-diameter, high-pressure natural-gas pipeline. Use of the pipe allows significant material-cost savings by permitting thinner wall requirements. This savings is potentially enhanced by the fact that this higher strength pipe requires no

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