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首页> 外文会议>Proceedings of the ASME India oil and gas pipeline conference 2013 >INTERNAL CORROSION DIRECT ASSESSMENT FOR HYDROCARBON SERVICE PETROLEUM PIPELINES
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INTERNAL CORROSION DIRECT ASSESSMENT FOR HYDROCARBON SERVICE PETROLEUM PIPELINES

机译：油气服务石油管道的内部腐蚀直接评估

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Contaminants such as CO_2, H_2S and O_2 in water-wet liquid and gas pipelines create an aggressive environment conducive to facilitating internal corrosion. During pipeline operations, solids deposition, water accumulation, bacterial activities and improper chemical inhibition aggravate the internal corrosion attack. For assessing the threat of internal corrosion, the petroleum industry currently has only three integrity validation tools at its disposal. These are Pressure Testing, In-line Inspection (ILI) and Internal Corrosion Direct Assessment (ICDA). To enhance pipeline integrity for piggable and non-piggable pipelines, NACE International has developed and published a variety of industry consensus Standard Practices for the ICDA protocols to predict time-dependent internal corrosion threats for various petroleum products in both offshore and onshore under sweet or sour environments. These NACE International ICDA Standards include: 1. SP0206-2006 "ICDA Methodology for Pipelines Carrying Normally Dry Natural Gas (DG-ICDA)". 2. SP0208-2008 "ICDA Methodology for Liquid Petroleum Pipelines (LP-ICDA)". 3. SPO110-2010 "Wet Gas ICDA Methodology for Pipelines (WG-ICDA)". 4. Multiphase flow (MP-ICDA) is under development with TG-426 and will be released in 2013. 5. Process Piping (PP-ECDA, Above Ground) is in its early stages of development with the release not likely before 2015. 6. Process Piping (PP-ECDA, Buried) is in its early stages of development with the release not likely before 2015. 7. Process Piping (PP-ICDA) for various service environments is in its early stages of development with the release not likely before 2015. All ICDA protocols are a structured, iterative integrity assessment process, consisting of the following four steps: Preassessment, Indirect Inspection, Detailed Examination and Postassessment. Most importantly, unlike ILI and pressure testing, all the ICDA standards require a mandatory root cause analysis and a go forward mitigation plan to arrest the corrosion processes being encountered. This paper reviews the following case studies: LP-ICDA for a crude oil pipeline and WG-ICDA for a high pressure gas pipeline with free water and condensate. ICDA is applicable for dry gas systems too but due to limiting length of this paper, the dry gas case study is not detailed. This paper will be useful for the pipeline operators to provide guidance in identifying locations at which corrosion activity has occurred, is occurring, or may likely occur in the future under a series of pre-defined operating conditions.
机译：水润湿的液体和气体管道中的诸如CO_2，H_2S和O_2之类的污染物会产生侵蚀性环境，有利于内部腐蚀。在管道运行过程中，固体沉积，积水，细菌活动和不适当的化学抑制作用会加剧内部腐蚀。为了评估内部腐蚀的威胁，石油行业目前只有三个完整性验证工具可供使用。这些是压力测试，在线检查（ILI）和内部腐蚀直接评估（ICDA）。为了增强可插拔和不可插拔管道的管道完整性，NACE International已经开发并发布了多种行业共识的ICDA协议标准规范，以预测含糖或含糖的海上和陆上各种石油产品随时间变化的内部腐蚀威胁环境。这些NACE国际ICDA标准包括：1. SP0206-2006“用于输送正常干燥天然气的管道的ICDA方法论”（DG-ICDA）。 2. SP0208-2008“液态石油管道的ICDA方法论”（LP-ICDA）。 3. SPO110-2010“管道湿气ICDA方法论（WG-ICDA）”。 4.多相流（MP-ICDA）正在与TG-426一起开发，并将于2013年发布。5.工艺管道（PP-ECDA，地上）正处于开发的早期阶段，不太可能在2015年之前发布。 6.进程管道（PP-ECDA，埋藏）处于开发的早期阶段，不太可能在2015年之前发布。7.各种服务环境的进程管道（PP-ICDA）处于开发的早期阶段，没有发布可能在2015年之前。所有ICDA协议都是一个结构化的迭代完整性评估流程，包括以下四个步骤：预评估，间接检查，详细检查和后评估。最重要的是，与ILI和压力测试不同，所有ICDA标准都需要进行强制性的根本原因分析并制定缓解计划，以制止遇到的腐蚀过程。本文回顾了以下案例研究：用于原油管道的LP-ICDA和用于具有游离水和冷凝水的高压天然气管道的WG-ICDA。 ICDA也适用于干燥气体系统，但由于本文篇幅有限，因此未详细说明干燥气体案例研究。本文对于管道运营商提供有用的指导，可用于识别在一系列预定的运行条件下发生，正在发生或将来可能发生腐蚀活动的位置。

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