How much current magnitude can be applied for DCVG survey more then normal functioning current especially in dry environment like desert.and if it can creat an overprotetion is acceptable or not.thank you.
hank you for your question Darren. The relative sizing of defects is dependent on a number of factors and is unique to each pipeline. If the pipeline in question had suitably sized coupons installed, and these are bedded in the same backfill as the pipe, it may be possible to use these to correlate with the %IR readings. However, in the majority of instances, calibration digs are undertaken of a selection of different %IR - to verify the defect size vs %IR and determine what %IR should be repaired. We hope that answers your question adequately. Feel free to contact Isinyithi if you need further assistance. (pipeline@isinyithi.co.za)
Thank you. Frome Algeria
Thank you so much . Frome Algeria too,
Unbelievable informative video, thank you so much for your valuable contribution!!
very goog explanation, Regards
Thanks for this video.
Vert interesting subject,Thank you
How much current magnitude can be applied for DCVG survey more then normal functioning current especially in dry environment like desert.and if it can creat an overprotetion is acceptable or not.thank you.
Thankfully the DCVG equipment now is electronic and the mV difference is easy to record.
Great talk. Is it not possible to size defects against a coupon of known size?
hank you for your question Darren.
The relative sizing of defects is dependent on a number of factors and is unique to each pipeline.
If the pipeline in question had suitably sized coupons installed, and these are bedded in the same backfill as the pipe, it may be possible to use these to correlate with the %IR readings.
However, in the majority of instances, calibration digs are undertaken of a selection of different %IR - to verify the defect size vs %IR and determine what %IR should be repaired.
We hope that answers your question adequately.
Feel free to contact Isinyithi if you need further assistance. (pipeline@isinyithi.co.za)