管道运行英文翻译管运行英文翻译.docVIP

Third-party Damage Index Third-party Damage Index A. Minimum Depth of Cover 0-20 pts 20% B. Activity Level 0-20 pts 20% C. Aboveground Facilities 0-10 pts 10% D. Line Locating 0-15 pts 15% E. Public Education Programs 0-15 pts 15% F. Right-of-way Condition 0-5 pts 5% G. Patrol Frequency 0-15 pts 15% 0-100pts 100% This table lists some possible variables and weightings that could be used to assess the potential for third-party damages to a typical transmission pipeline (see Figures 3.1 and 3.2). Background Pipeline operators usually take steps to reduce the possibility of damage to their facilities by others. The extent to which mitigating steps are necessary depends on how readily the system can be damaged and bow often the chance for damage occurs. Third-party damage, as the term is used here, refers to any accidental damage done to the pipe as a result of activities of personnel not associated with the pipeline. This failure mode is also sometimes called outside force or external force, but those descriptions would presumably include damaging earth movements. We use third-party damage as the descriptor here to focus the analyses specifically on damage caused by people not associated with the pipeline. Potential earth movement damage is addressed in the design index discussion of Chapter 5. Intentional damages are covered in the sabotage module (Chapter 9).Accidental damages done by pipeline personnel and contractors are covered in the incorrect operations index chapter (Chapter 6). U.S. Department of Transportation (DOT) pipeline accident statistics indicate that third-party intrusions are often the leading cause of pipeline failure.