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Structural Integrity of Pipelines

机译:管道的结构完整性

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摘要

The acceptance standards given in API 1104 Section 9 are based on empirical criteria for workmanship and place primary importance on imperfection length. Such criteria have provided an excellent record of reliability in pipelines service for many years. Alternative acceptance standards for girth welds are presented in Annex A. The use of fracture mechanics analysis and fitness for service criteria for determining acceptance criteria incorporates the evaluation of both imperfection height and imperfection length. This criteria usually provide more generous allowable imperfection length. This approach is applied to a new gas pipeline, API 5L X70 material, 24 inches diameter and 11.9 mm thickness. The applied methodology is presented to perform failure assessment diagram (FAD) and a sensitivity analysis and safety margins or factors are determined.
机译:API 1104第9节中给出的验收标准基于工艺的经验标准,并且对缺陷的长度至关重要。多年来,这些标准为管道服务的可靠性提供了出色的记录。附件A给出了环焊缝的替代验收标准。使用断裂力学分析和对服务标准的适应性确定验收标准时,结合了对缺陷高度和缺陷长度的评估。该标准通常提供更大的容许缺陷长度。此方法适用于新的天然气管道,API 5L X70材料,直径24英寸,厚度11.9毫米。提出了应用的方法来执行失效评估图(FAD),并确定了灵敏度分析和安全裕度或因素。

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