非金属管道(NMP)材料在石油和天然气行业中用作内部衬里和独立管道,构成了一种新兴的腐蚀策略。NMP材料本身容易受到蠕变导致的逐渐损坏,疲劳,渗透,加工缺陷,和安装失误。在酸性气体(CO2,H2S)的存在下,和高压高温下的碳氢化合物,主要的损害是由于渗透。对渗透可能造成的损害的监测没有明确定义,这导致了资产完整性管理的不确定性。渗透损害的评估目前是通过机械进行的,热,化学,和结构特性,采用拉伸试验,差示扫描量热法(DSC),傅里叶变换红外光谱(FTIR),和扫描电子显微镜(SEM)/透射电子显微镜(TEM),为了评估拉伸强度的变化,伸长率,体重减轻或增加,结晶度化学性质,和分子结构。试样通常用于分析聚合物的降解。它们是点传感器,不能提供实时信息。聚合物是介电材料,可以使用阻抗分析仪和介电谱来研究这种介电特性。这篇评论介绍了由于酸性气体暴露而导致管道中聚合物衬里失效的简要状态报告,碳氢化合物,和其他污染物。渗透,衬垫失效,监测的重要性,并简要讨论了新的专有(介电)性能。提供了一个包容的视角,显示了与管道中聚合物衬里材料监测相关的挑战,因为它与寿命预测要求有关。
Non-metallic pipe (NMP) materials are used as an internal lining and standalone pipes in the oil and gas industry, constituting an emerging corrosion strategy. The NMP materials are inherently susceptible to gradual damage due to creep, fatigue,
permeation, processing defects, and installation blunder. In the presence of acid gases (CO2, H2S), and hydrocarbons under high pressure and temperature, the main damage is due to permeation. The monitoring of possible damage due to
permeation is not well defined, which leads to uncertainty in asset integrity management. Assessment of
permeation damage is currently performed through mechanical, thermal, chemical, and structural properties, employing Tensile Test, Differential Scanning Calorimetry (DSC), Fourier-transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM)/Transmission Electron Microscopy (TEM), to evaluate the change in tensile strength, elongation, weight loss or gain, crystallinity, chemical properties, and molecular structure. Coupons are commonly used to analyze the degradation of polymers. They are point sensors and did not give real-time information. Polymers are dielectric materials, and this dielectric property can be studied using Impedance Analyzer and Dielectric Spectroscopy. This
review presents a brief status report on the failure of polymer liners in pipelines due to the exposure of acid gases, hydrocarbons, and other contaminants.
Permeation, liner failures, the importance of monitoring, and new exclusive (dielectric) property are briefly discussed. An inclusive perspective is provided, showing the challenges associated with the monitoring of the polymer liner material in the pipeline as it relates to the life-time prediction requirement.