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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=683096
• 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 storagecontainers. Degradation of insulated metal piping, pressure vessels and structural components may be theresult of 1) internal corrosive processes, arising within the existing transport medium or 2) external sourcessuch 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 oflocalized wall thickness measurements after insulation removal. PEC has a demonstrated capability to performinspection in the presence of conducting ferromagnetic materials at large lift-offs. This project will: 1) Developpulsed eddy current (PEC) technology, including probe design that is optimized for rapid inspection ofinsulated electrically conducting pipe at large lift-off for general corrosion. 2) Demonstrate capabilities andlimitations of such technology. 3) Develop theoretical models of the response of PEC to changing wallthickness, lift-off and permeability and validate these against laboratory measurements. 4) Optimize probedesign for the target inspection conditions and assist in identifying parameters that may affect measurementaccuracy using the developed models. This work will be important to inspection service providers who cannotcurrently 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 forconditions of corrosion in chemical processing, oil and gas and liquid transport and containment industries willsupport the performance of Canadian industry in these areas. HQP will be trained to enter the workforce in thisrapidly growing area of in-service inspection.

绝缘管和钢结构出现在大量的应用中，包括石油和天然气管道、石化工业中的工厂平衡、建筑物的钢支撑结构和大型液体储存容器。绝缘金属管道、压力容器和结构部件的劣化可能是以下原因造成的：1）内部腐蚀过程，在现有的输送介质中产生;或2）外部来源，如充气水或含有腐蚀性污染物的水，这些污染物已被引入厚（高达51 mm）的绝缘屏障中。可能发生腐蚀的其他区域包括地上碳钢储罐，其中绝缘层可以为6至10 mm厚。目前的超声波检测技术只能在绝缘层去除后进行局部壁厚测量。PEC已证明有能力在大提升时在存在导电铁磁材料的情况下进行检查。该项目将：1）开发了脉冲涡流（PEC）技术，包括探头设计，该探头设计优化用于在大提离下快速检测绝缘导电管道的全面腐蚀。2)展示这种技术的能力和局限性。3)开发PEC对变化壁厚、提离和渗透性的响应的理论模型，并根据实验室测量结果验证这些模型。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。这项工作将是重要的检查服务供应商谁目前不能执行本地检查的管道，而不昂贵和耗时的去除绝缘。技术的发展，将有助于在生命周期管理和提高评估能力为条件的腐蚀化学加工，石油和天然气和液体运输和遏制工业将支持加拿大工业在这些领域的表现。HQP将接受培训，以进入这一快速发展的在职检查领域的劳动力队伍。