共查询到20条相似文献,搜索用时 843 毫秒
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<正>近期,从采油一厂防腐工作会上传来消息,该厂管道腐蚀治理取得明显成效,腐蚀刺漏问题同比减少了31%,治污费用减少了58.8%,年创效达600余万元。腐蚀主要包括管线腐蚀和设备腐蚀,由于服役时间长、介质腐蚀性强等因素影响,时常造成管线腐蚀穿孔,严重影响油气正常生产。该厂采取多种举措,为油气水管线构筑了一道"防腐墙"。采用防腐管材,是进行"内部防 相似文献
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东风4型内燃机车柴油机的回水管与增压器出水管连接处焊缝,因应力集中系数高,易导致疲劳裂纹,机车因回水管裂漏引起耗水量增大,影响正常运行.而机车回段整备修需要2-3 h,给焊修带来很大困难.16V240ZJB型柴油机回水总管与增压器水管连接处焊缝裂漏,位置如图1所示. 相似文献
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重油催化装置烟气管线阀密封面磨损严重、发生内漏造成装置停工,通过分析阀座的化学成分、硬度、微观组织以及操作条件对阀门的影响,认为阀门失效的原因是:阀门结构设计不合理及烟气管线内流体夹带固体粉末在高温下的冲蚀先造成了阀座密封面磨损,导致阀门失效. 相似文献
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在用管道漏磁检测装置的研制 总被引:7,自引:0,他引:7
将计算机技术,机电控制技术和信号处理技术与漏磁检测技术结合起来,研制成一种适用于野外作业的便携式管道缺陷漏磁检测装置,实验测试表明,该装置灵敏度及检测效率高,且成本低,在管道外侧一次扫查能检测出管道内外壁缺陷,在冶金,石油化工以及城市水暖供应等工业部门中具有广阔的应用前景。 相似文献
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The paper deals with the failure investigation of furnace‐tubes of a few medium capacity (86 T/H steam generation) package boilers in a petrochemical plant. As a consequence of damage, the boilers required major tube‐repair on urgent basis, and complete tube replacement within a period of two years. Failure of different boilers took place at varying service durations, though all of them had the same design and criteria of operation. The study included metallurgical characterization of the failed components; analysis of operation and process (historical) data; review of inspection and maintenance records; evaluation of design and water‐treatment practices; etc. As a result, water‐side corrosion was attributed to be the cause of tube‐leakage via general and localized corrosion mechanism, while, no metallurgical defects and changes were noticed in the failed components. On the other hand, process and operational abnormalities were diagnosed as the root cause of trouble initiation and propagation. In order to avoid the recurrence of such failures, various preventive measures (inspection, maintenance, operation and process) have been recommended. 相似文献
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H. M. Tawancy Luai. M. Al-Hadhrami 《Journal of Materials Engineering and Performance》2012,21(8):1757-1762
A jacketed underground pipeline made of 304 stainless steel tubing to transport utility water in a petrochemical plant at ambient temperature was perforated after few months of operation. Perforation started preferentially at the outer bottom surface of the pipe in the weld heat-affected zones where the insulating coating was damaged. Detailed microstructural characterization was carried out to determine the cause of failure using optical metallography, x-ray diffraction, scanning electron microscopy combined with energy dispersive spectroscopy, and transmission electron microscopy. Experimental results indicated that the failure occurred by interaction between the outer bottom surface of the pipe and surrounding environment leading to pitting and stress corrosion cracking in the presence of chloride ions. This could have been aided by residual welding stresses and the characteristic low stacking fault energy of the material. 相似文献
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基于声波原理检测供水管道泄漏 总被引:3,自引:0,他引:3
采用基于声学原理的区域漏水噪音诊断仪和相关仪共同检测供水管道泄漏。前者通过长时间听与统计分析结合的方法初步判断泄漏点,后者根据相关函数极值点位置精确定位。同时采用两种方法对某实际供水管道泄漏点进行定位,定位误差为1.8%。因此两种方法联合应用可有效检测供水管线泄漏。 相似文献
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对常压法三聚氰胺生产过程中产生的废渣进行理化性能、可燃烧性试验室检测,并对燃烧后的尾气进行测试,最终在乌石化热电厂锅炉进行了掺烧试验,结果表明,掺烧少量的三胺废渣,对热电厂锅炉操作无任何影响,产生的烟气及除渣废水中均没有检测到有害物质,烟气中的粉尘含量也无明显变化,该废渣与原煤掺混能够作为电厂锅炉的燃料使用. 相似文献
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采用科学、有效的检测技术,对管道的防腐层的完整性、管体腐蚀现状及环境腐蚀性等进行系统、全面检测与评价,排查管道高后果段、高风险段应力集中状况,为管道的完整性管理提供可靠依据,可有效避免管道发生腐蚀泄漏失效,实现在役管道安全、可靠的稳定运行。本文以某凝析油管道为例,介绍基于综合检测评价的管道外防腐管理体系在油田的应用效果。 相似文献
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从石化炼油装置常见的管道特定焊接方法出发,分析了CO2气保焊在炼油管道焊接中的常见缺陷及其用超声检测的适用性。对超声检测工艺进行了选择和优化,对于实际生产中压力管道的安装和超声检测具有指导意义。 相似文献
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输油管线是原油运输的重要通道,随着石油资源需求量的不断增加,对于输油管线的运维管理能力提出了更高的要求.由于原油的特殊性质,使得输油管线在长期运行过程中容易受到腐蚀,引起输油管线的运行风险,一旦造成原油泄露的安全事故,将会造成十分严重的后果.针对输油管线的腐蚀问题,需要在明确腐蚀原因的基础上采取相应的防腐措施,维护输油... 相似文献