共查询到19条相似文献,搜索用时 582 毫秒
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跨海架空管道主要位于浅海区域,检验人员难以接近,大部分检验项目只能采用非接触式检验方法。根据跨海架空管道的特点,介绍了管体腐蚀状况检测及安全评价方法,并提出了具体步骤和方法。该方法可实现对管体缺陷的检测,对检测中发现的超标缺陷进行安全评价,且具有检测时不停输、不去除防腐涂层、实时在线检测的特点。应用上述方法对某跨海架空管道进行了检测评价,通过对管体腐蚀缺陷的检测评价,提出了确保管道安全运行应采取的措施。 相似文献
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管道腐蚀检测相关技术主要包括:管道沿线环境调查,管线探测与测绘,管道防腐层完整性检测,管体检测,管道阴极保护系统检测,管道泄漏检测、监测及腐蚀管道的安全评价.管道腐蚀的根本在于管体,埋地钢质管道的腐蚀防护广泛采用施加防腐蚀涂层并附加阴极保护.针对埋地钢质管道防腐层检测评价、管体检测评价这两方面内容,介绍两种管道腐蚀检测... 相似文献
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结合完整性检测技术和基于风险的检验技术,介绍了两种确定埋地压力管道检验周期的方法以及在检测项目中的应用情况,并对这些方法进行了对比.第一种方法既考虑到管道失效造成的后果,又考虑到管道的失效可能性,是一种比较准确地确定埋地压力管道检验周期的方法.第二种方法仅考虑到失效的可能性,但计算过程简便,适用于粗略估算.用两种方法分别对相同管道进行了检验周期评价,计算过程还需要在将来的工程应用中逐步完善.这些方法的应用,避免了目前确定埋地压力管道检验周期的盲目性,降低了企业生产成本,减少了检验检测单位的工作量. 相似文献
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油田埋地管道防腐层破损点检测及影响因素 总被引:2,自引:1,他引:2
简要阐述了埋地管道防腐层破损点的检测原理,并通过现场检测实例,总结出了影响防腐层破损点检测的几个主要因素,同时提供了解决方法,以提高防腐层破损点的检测准确率. 相似文献
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The purpose of this paper is to study an economic efficiency for the prediction of additional truck turnaround time and for determining the number of the port security inspection equipment required at a terminal inspection station. The economic efficiency with six base models was developed to assist terminal operators' decision‐making. In addition, this study developed an optimal procedure that terminal operators could use to optimally run in terms of various statistics processes including exponential, deterministic, and others, seeking a solution that was beneficial for both terminal operators and truckers. As a result of this research of the additional cargo turnaround time for port security delay, the following conclusion can be drawn and made. The average additional delay time in the inspection station is very dependent on the inspection rate of the lower stage. The higher weighted inspection time based on raising security level allows less number of trucks to be inspected, which will derive high delay in the inspection station. Increase of rate of Green Lane usage will allow a decrease in the arrival rate, which may derive improvement of inspection equipment efficiency and average delay time at the inspection station. In multiple stage model, total number of trucks and delay time very closely follow those of low inspection stage rate and number of inspection units. Free Lane is to be followed by Customs‐Trade Partnership Against Terrorism and standardization of customs, packing, loading and unloading, documents, procedure, and exchange working in each country. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献