Electromagnetic Ultrasonic EMAT Non invasive Corrosion Monitoring Solution

Causes of pipeline corrosion:

During the use and transportation of hazardous chemical pipelines and storage tanks in petroleum refining and other chemical enterprises, corrosive substances such as sulfides and water-soluble alkalis may be present. Corrosion of production equipment and transportation pipelines during the production, processing, and transportation process. It mainly occurs in leakage point corrosion in low-temperature areas, sulfur corrosion in high-temperature areas, and cyclic acid corrosion in high-temperature areas. Once the pipeline is corroded and damaged, it may lead to oil and gas leaks, which can easily cause fires and threaten the safety of surrounding residents' lives and property. There are research results showing that oil and gas pipelines will experience severe corrosion after about two years of use.

The necessity of online monitoring:

Corrosion maintenance costs: 1. Design, processing, and construction costs 2. Pipeline material selection 3. Increase in pipeline wall thickness 4. Irregular shutdown to reduce corrosion

Operating production costs: 1. Corrosion component costs 2. Maintenance costs after corrosion 3. Shutdown costs after corrosion

Limitations of manual corrosion measurement; 1. Human factors uncertainty 2, problem repeatability and reproducibility 3, feasibility in harsh environments 4, lack of long-term effective online detection and data analysis of on-site equipment pipelines. Predicting the lifespan of pipelines is difficult to predict the risks associated with existing pipelines; Therefore, the interval between major repairs is too long, and it is difficult to measure the corrosion of overhead pipelines regularly. A device that can perform online corrosion monitoring of pipelines is needed.

Beijing Hangu Online Corrosion Monitoring and Evaluation Prediction System

Electromagnetic Ultrasonic Testing Technology (EMAT) refers to the use of a strong pulse voltage in a permanent magnetic field to generate a pulse current in a coil and a strong electromagnetic field around it. The electromagnetic field radiated to the surface of the object will generate eddy currents on the surface of the object. The eddy currents are subjected to Lorentz forces, and the direction of the force is perpendicular to the eddy currents, pointing towards the center of the eddy currents, resulting in the generation of electromagnetic ultrasonic waves on the surface.

Compared with traditional ultrasonic testing techniques, it has the advantages of high accuracy, no need for coupling agents, non-contact, suitable for high-temperature detection, and easy excitation of various ultrasonic shapes.

Main functions:

EMAT Electromagnetic Ultrasonic Testing Technology

No need for polishing, no need for coupling agent, non-invasive and non-destructive installation

Real time temperature correction technology

Measurement accuracy reaches 0.001mm

The system implements corrosion rate calculation and can predict the remaining life of pipelines
Cloud system monitoring, allowing for anytime, anywhere viewing of corrosion status

Private deployment, secure and confidential

System Advantages

Corrosion monitoring nodes and communication gateways

Advantages of online corrosion monitoring and evaluation prediction system

1. Standardization system construction

(1) The current industry mainly uses manual inspection methods for corrosion detection, and the routes and testing operations of manual inspection are highly uncontrollable due to personnel responsibility issues, which cannot guarantee the reliability of data.

(2) The detection location setting and monitoring operation process of the pipeline are not standardized, and there are errors in the measurement data of different inspection personnel.

(3) There are various brands and types of thickness measuring equipment used for manual inspection, based on different detection technology principles, resulting in significant differences in accuracy between the detection equipment.

(4) The testing personnel record the testing data on paper and then enter it into the system, which poses risks of input errors and long upload cycles.

2. Digital system construction

(1) Traditional corrosion detection data relies on regular inspection records, with single data and imprecise analysis methods. The monitoring platform can uniformly save records.

(2) There is a lack of unified management and scheduling for personnel inspection routes and times, and there is no linkage between equipment, personnel, and data.

3. Establish an information management system

(1) The traditional approach belongs to the experience driven type, and the formulation and implementation of detection plans rely on the experience of management and detection personnel, with significant subjective factors.

Improvement: The information technology approach belongs to the data-driven type, relying on computers for extensive calculations and data analysis, thereby providing solutions for management and testing personnel

(2) Hierarchical management mechanism