Field Test
Petro Farayand Alvand Company, with the help of state-of-the-art technologies and continuous training, provides the following services in order to check and monitoring the cathodic protection system, condition and efficiency of coating, troubleshooting and elimination of possible defects such as:
- Fast data recording by data logger
- DCVG and ACVG
- CIPS
- ECDA
- Review and evaluation of coverage
Quick recording of the potential of the structure in contact with the electrolyte by sampling more than 50 data per second with the help of Data Logger, allows useful information such as instant off potential, IR drop, instant on potential, profile Potential over time from a few milliseconds to several days and months is possible 24 hours a day.
Data logger equipped with current interrupter and GPS in order to synchronize and record the off potential with the least possible difference and with an accuracy of about 0.01 mV, record the relevant data and while displaying it as a graph, specify the required information It seems.
DCVG و ACVG
Non-destructive clay of pipelines and their coating using modern method of DC and AC current voltage gradient analysis is a method that is used with the help of the latest technology in the world to check the status of cathodic protection system and coating of transmission pipelines. DCVG method with the help of a current INTRUPTER and reference of special electrodes and with monitoring of the whole pipeline. Provides voltage along the pipe, conductivity and resistance of the coating in the soil, etc.
The Company also Provides cathodic protection and control of linear corrosion, coating defects, stray currents, PICK UP points, Discharge field current, current and voltage along the pipe, conductivity and resistance of the coating in the soil, etc.
CIPS
CIPS or Close Interval Potential Survey is a method that uses modern equipment and technology to measure point-to-point and accurate potential along the pipeline relative to the electrolyte and soil.
This method gives an accurate diagram of the on and instant off potential of the entire pipeline (covered and bare) to the corrosion engineer and helps him to analyze the results of the cathodic system, its condition, diagnose defects and determine hot spots.
ECDA
ECDA or External Corrosion Direct Assistant method is the continuous inspection method based on NACE SP0502 standard that used to monitor and evaluate the corrosion and efficiency of the corrosion control system in the pipeline and other equipment. This method is used for lines that:
- Cannot be inspected by conventional methods
- have been inspected by conventional methods and it has not been possible to identify areas prone to corrosion.
- Determining sensitive and corrosive points is a priority in them.
This method also allows the diagnosis of defects due to mechanical damage, SCC and microbial corrosion and prevents the growth and increase of corrosion defects.
This method includes the following:
- Initial evaluation
- Direct inspection
- Indirect inspection
- CIPS
- DCVG
- Stream map or PCM
- Analysis of water, soil
- Electromagnetic studies
- Pearson Field Survey
- Final evaluation.
