Essential Features of Implementing A DCVG (Direct Current Voltage Gradient) Survey

Essential Features of Implementing A DCVG (Direct Current Voltage Gradient) Survey

What is a DCVG Survey?

A DCVG (Direct Current Voltage Gradient) Survey is performed to identify corrosion defects within a pipeline, mainly for buried pipelines. In addition, it assesses the effectiveness of corrosion protection and determines major and minor defects within the equipment.

Pipelines, being significant play a crucial role in the oil and gas industries. To note, buried or underground pipelines are prone to corrosion despite highly resistant coatings. Due to this, it is of utmost priority to detect pipeline-coating faults and analyze loopholes in corrosion control strategies.

Moreover, Direct Current Voltage Gradient is one of the most effective and reliable methods to assess the efficiency of a pipeline cathodic protection system, as a part of the ECDA (external corrosion direct assessment) concept.

Direct Current Voltage Gradient
Implementing a DCVG Survey

Implementing a Direct Current Voltage Gradient Survey

As discussed earlier, a Direct Current Voltage Gradient survey identifies coating defects within the pipelines (buried/underground). The process of applying Direct Current Voltage Gradient is efficacious through implementing a DCVG survey; the process mainly follows some important points mentioned below:

  • Determining the current condition of protective coatings of pipelines
  • Applying a DC current to the pipeline
  • Identifying voltage gradients as DC current flows through the soil creating a voltage gradient.
  • Observing and analyzing the direction of the gradients to locate protective cathodic and anodic coating faults.

Key features of DCVG

  • Precise and reliable results
  • High-sensitive results
  • Identification of minor and major pipeline defects
  • High-resolution coating defect results
  • Accurate voltage gradient detection at ground level

Velosi’s DCVG Survey Service Globally

Velosi’s team of experienced professionals extensively performs a DCVG survey as ECDA (external corrosion direct assessment) concept, enhancing overall asset integrity. Our DCVG survey equips advanced equipment facilities in accordance with legal standards. Furthermore, at Velosi, we deliver custom-made solutions best suitable to your business needs.

Please contact us for more information and assistance.


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