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双金属复合管是一种新型管材,内层金属为不锈钢,外层金属为碳钢。由于两层金属的结合属于机械贴合结构,在焊缝的射线检测中经常出现结构性黑影,干扰底片的正常评定。本文根据历次工程中的情况,结合辽河油田双六储气库工程,对结构性黑影进行了分析,提出了结构性黑影的确认准则,为双金属复合管在工程中的应用质量保证提供了技术支持。
Bimetallic composite pipe is a new type of pipe, the inner metal is stainless steel, the outer metal is carbon steel. Due to the combination of two layers of metal is a mechanical fit structure, often in the weld ray detection of structural darkness, interfere with the normal assessment of the film. In this paper, according to the situation in previous projects, combined with the double Liu six gas storage project in Liaohe Oilfield, the structural shadow is analyzed, and the criteria for the confirmation of structural shadow are put forward, which provides the application quality assurance for bimetallic composite pipe in engineering Technical support.