Fracture control technology and development for modern high-strength gas transmission pipelines
- 作者：Xian-Kui Zhu
- 会议时间：2013-09-01
- 关键词：running fracture ; CVN energy ; DWTT energy ; BTCM ; fracture toughness ; high strength steel ; gas pipeline
- 作者单位：Battelle Memorial Institute,505 King Avenue,Columbus,Ohio 43201,USA
- 母体文献：2013中国国际管道会议暨第一届中国管道与储罐腐蚀与防护学术交流会论文集
- 会议名称：2013中国国际管道会议暨第一届中国管道与储罐腐蚀与防护学术交流会
- 会议地点：廊坊
- 主办单位：中国腐蚀与防护学会
- 语种：chi
摘要
Regulations require fracture control plan in the structural design and safe operation for a gas transmission pipeline.Fracture control involves technology to be developed to control brittle fracture, ductile fracture initiation, and ductile fracture propagation in a transmission pipeline, as reviewed in this paper.Approaches for the first two issues that were developed forty years ago are still in use today, with limited improvement.In contrast, ductile fracture propagation and arrest have obtained extensive attention and research, but technology is still needed to develop for modem high-strength pipeline steels.Thus, this work primarily focuses on the discussions of technology and development for ductile fracture propagation control in gas pipelines.In order to control ductile fr acture propagation, Battelle in the mid1970s developed a two-curve model (BTCM) to determine arrest toughness for gas pipeline steels in terms of Charpy vee-notched (CVN) impact energy.Practice showed that the BTCM is viable for pipeline grades up to X65, but issues have emerged for higher grades.Thus, different corrections or alternative methods to improve the BTCM have been proposed.This includes the CVN energy-based correction methods, the drop-weight tear test (DWTT) energy-based methods, the crack-tip opening angle (CTOA) methods, and finite element analysis methods.This paper reviews and evaluates these methods, and also discusses the newest technology developed to determine fracture arrest toughness for high-strength pipeline steels in grades X80 and above.