We have skilled personnel and equipment to carry out the Close Interval Potential Surveys (CIPS) to evaluate the effectiveness of the installed Cathodic Protection system and underground pipeline’s coating integrity. The coating damage will be determined by CIPS
DCVG, a direct current (DC) signal is applied to the pipeline and the voltage gradient in the soil above the pipeline is measured. Voltage gradients, as measured between two calibrated reference electrodes spaces apart, arise as a result of the current pickup or discharge at pipeline coating faults location to estimate the coating breakdown size and position. Physical examination and repair of the pipeline depend the magnitude of the voltage gradient.
Holiday test one of the non-destructive methods applied on coating to detect unacceptable faults and discontinuities such as pinholes and voids on exposed pipeline.If electrical flow detected then the test area is termed as conductive indicating presence of discontinuities.
The underground pipelineand other buried facilities are subjected to electrical interference by third party sources. This includes AC and DC interference from other cathodic protection system, DC & AC interference from railway system, AC interference from high voltage transmission line and also from power generation industry. These interferences can cause the severe damage or corrosion of adjacent underground steel structures. Also will cause electrical shock hazard to human.
The interference study includes manual calculation with strict adherence to NACE specifications, and also to provide accurate simulation result through state-of-the-art simulation software.
Once the interference study and assessment is done, will provide the efficient and effective mitigation method to mitigate or eliminate the AC and DC interference issue.
Bio-fouling problems associated with sea water system are well known in affecting the system’s performance and in time the growth also influence the corrosion rate when the material of the structure react with the substances. Mussels, barnacles and other type of marine growth will attach themselves to the structure and if left unattended, the buildup can obstruct the structure and block the system. Periodic shut down and maintenance of the pipeline is time consuming and has high cost impact.
We provide a solution by designing an anti-fouling of electrolytic process on the surface of the protected structure where metal ions act as anti-fouling agent. It is suitable to be applied on static equipment that are immersed in sea water like water pumps etc.
A cold applied tape are manufactured from high performance PVC/HDPE files laminated to a layer of specially formulated rubber modified bituminous adhesive or high tack butyl rubber designed for corrosion prevention on field joints, fittings, specialty piping and repair or rehabilitation. The outer layer of PVC/HDPE to provide good mechanical strength or resistant from abrasion and cut.
The cold wrapped is fexible and conformable, immediate and aggressive bond to substrate and at overlap. Long lasting protection. Clean and easy to use by hand or machine. Easy to repair or replace after inspection. Resistant to dilute mineral acids, alkalis and salts. Non cracking and non absorbent to moisture. Immediate effect with no curing time. Compatible with, and can be used to overwrap most pipeline coatings.