Fast screening for detection of heavy corrosion in insulated pipe using pulsed eddy current

使用脉冲涡流快速筛选检测保温管道中的重腐蚀

• 批准号: 507066-2016
• 负责人: Krause, Thomas
• 金额: $ 2.11万
• 依托单位: Royal Military College of Canada
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=655977
• 关键词: Fast; screening; detection; heavy; corrosion

Insulated pipe and steel structures arise in a large number of applications including oil and gas pipeline,**balance of plant in the petrochemical industry, steel support structures for buildings and large liquid storage**containers. Degradation of insulated metal piping, pressure vessels and structural components may be the**result of 1) internal corrosive processes, arising within the existing transport medium or 2) external sources**such as aerated water or water with corrosive contaminants that have been introduced into thick (up to 51 mm)**insulating barriers. Other areas where corrosion may occur include above ground carbon steel storage tanks,**where insulating layers can be 6 to10 mm thick. Current ultrasonic inspection technology is only capable of**localized wall thickness measurements after insulation removal. PEC has a demonstrated capability to perform**inspection in the presence of conducting ferromagnetic materials at large lift-offs. This project will: 1) Develop**pulsed eddy current (PEC) technology, including probe design that is optimized for rapid inspection of**insulated electrically conducting pipe at large lift-off for general corrosion. 2) Demonstrate capabilities and**limitations of such technology. 3) Develop theoretical models of the response of PEC to changing wall**thickness, lift-off and permeability and validate these against laboratory measurements. 4) Optimize probe**design for the target inspection conditions and assist in identifying parameters that may affect measurement**accuracy using the developed models. This work will be important to inspection service providers who cannot**currently perform local inspection of pipe without expensive and time consuming removal of insulation.**Development of technologies that will assist in lifecycle management and improve assessment capability for**conditions of corrosion in chemical processing, oil and gas and liquid transport and containment industries will**support the performance of Canadian industry in these areas. HQP will be trained to enter the workforce in this**rapidly growing area of in-service inspection.**

保温管和钢结构在石油和天然气管道、石油化工装置平衡、建筑物钢支撑结构和大型液体储存容器等大量应用中出现。绝缘金属管道、压力容器和结构部件的劣化可能是1)在现有运输介质内产生的内部腐蚀过程的**结果，或2)外部来源**的结果，例如曝气水或含有腐蚀性污染物的水已被引入厚(最多51毫米)**绝缘屏障。其他可能发生腐蚀的区域包括地面碳钢储罐，**绝缘层厚度可达6至10毫米。目前的超声波检测技术只能**在拆除绝缘材料后进行局部壁厚测量。PEC已证明有能力在大升空时在存在导电铁磁材料的情况下执行**检查。该项目将：1)开发**脉冲涡流(PEC)技术，包括优化的探头设计，用于在大提离时快速检测**绝缘导电管道的一般腐蚀。2)展示此类技术的能力和**局限性。3)建立了PEC对改变壁厚、提离和渗透率的响应的理论模型，并与实验室测量结果进行了验证。4)针对目标检测条件优化探头**设计，并使用开发的模型帮助识别可能影响测量**精度的参数。这项工作对于检测服务提供商来说将非常重要，这些服务提供商目前无法**在不拆除绝缘材料的情况下对管道进行本地检测。**开发有助于生命周期管理的技术并提高对**化学加工、油气和液体运输以及安全壳行业**腐蚀状况的评估能力**将**支持加拿大工业在这些领域的表现。HQP将接受培训，以便进入这一**快速增长的在职检验领域。**