The reliability-based limit-state design method has been showed to be a development tendency in oil & gas pipeline engineering. It is adopted by international advanced pipeline standards.
基于可靠性的极限状态设计方法是油气管道工程设计的发展趋势，已为国际上先进的管道工业标准所采用。
For the total length of long distance pipeline, there is no definite stipulation in the design's stage in design standards.
在管道设计的各个阶段，长输管道的总长度在设计规范中没有明确的规定。
For the total length of long distance pipeline, there is no definite stipulation in the design's stage in design standards.
在管道设计的各个阶段，长输管道的总长度在设计规范中没有明确的规定。
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