长期运行对主要天然气管道钢性能的影响。综述

L. Nyrkova, S. Osadchuk, L. Goncharenko, A. Rybakov, Yuliya Kharchenko
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引用次数: 1

摘要

地下管道在运行过程中会受到机械和腐蚀因素的影响。阴极保护管道对氢降解的敏感性增加,从而导致应力腐蚀开裂。据认为,管道钢材降解的主要因素是变形老化,变形老化会增加强度,降低塑性。长期使用的钢材也会产生体积微损伤。但在许多情况下,长期运行的管道母材和焊接接头仍能保持令人满意的性能。由于金属在收货状态下的粘度和塑性值较高,因此可以认为长期运行的天然气管道的金属状态是令人满意的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of long-term operation on the properties of main gas pipeline steels. A review
Underground pipelines during operation are affected by mechanical and corrosive factors. The susceptibility of cathodically protected pipe to hydrogen degradation increases, which contributes to stress-corrosion cracking. It is believed that the main factor in pipeline steels degradation is deformation aging, which increases strength and reduces plasticity. Volume microdamages also develop in long-time exploited steels. But in many cases, the base metal and welded joints of long-term operated pipelines retain satisfactory performance. Due to the high value of viscosity and plasticity of the metal in an as-received state, the metal state of long-term operated gas pipelines can be considered satisfactory.
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