DCVG

[sakib321]

DCVG
will any body give me details about this method

its purpose
its method
its limitation
its application

[ben]

Go through the following link and if you have any specific query, do let me know.
http://en.wikipedia.org/wiki/DCVG

[Nabeel Ahmed Qureshi]

Direct Current Voltage gradient, an accurate method for picking wrapping defects & is widely used on underground pipelines.
Describe your specific query.
Regards
NAQ

[sakib321]

is it necessary to dig up the whole pipe for coating inspection by using this method
and can we ensure the integrity of pipeline via this technique

[ben]

Is your pipeline cathodically protected?

[sakib321]

not at all