论文部分内容阅读
在锅壳式燃油燃气热水锅炉的内部检验中,发现烟管的高温烟气入口管端产生裂纹,导致烟管泄漏是这种炉型最常见的失效形式。本文结合锅炉运行工况试图对烟管管端产生裂纹的原因进行分析,并提出一些防范管端产生裂纹的有效措施。1管端裂纹的形态和缺陷部位的金相组织通过对泄漏锅炉烟管管端裂纹渗透检测,发现常见的管端裂纹形态有:轴向裂纹、径向裂纹、周向裂纹和混合型裂纹。烟管内壁的轴向裂纹长短不
In the internal inspection of the boiler-shell oil-fired gas-fired hot water boiler, cracks were found in the pipe end of the high-temperature flue gas inlet of the smoke pipe, leading to smoke pipe leakage being the most common failure mode of this type of furnace. Based on the boiler operating conditions, this paper attempts to analyze the causes of cracks on the pipe ends and puts forward some effective measures to prevent cracks on the pipe ends. 1 The shape of the pipe end crack and the microstructure of the defect site Through the leak detection of the smoke pipe end crack penetration testing, found that the common pipe end crack morphology: axial crack, radial crack, circumferential crack and mixed crack. The inner wall of the smoke pipe axial crack length not