External inspection / assessment of pitting on live pipe 1

[mariolucas75]

A 20" live pipe is having an external corrosion / corrosion products build-up, flaking... what would you suggest to inspect the potential pitting under the deposit (how deep the corrosion might have gone under the deposit)?

Thank you

 

[SJones]

https://esrtechnology.com/insights/hois/inspection-of-uninsulated-external-corrosion-scabs/

https://www.bindt.org/News/May-2017/in-service-inspection-of-surface-scabs/

https://www.bindt.org/shopbindt/hoi...ernal-Corrosion-Scabs-HOIS-G-028-Issue-1.html

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[LittleInch]

A long screwdriver....

The corrosion products have very little strength so just scrape them off then do some UT.

Or just fit a bolted clamp over ituntil you can depressurise the line and examine a bit better or replace the section.

No pictures, size, walk thickness, pressure, so you're not going to get much more....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Louisiana Inspector]

A long screwdriver....

The corrosion products have very little strength so just scrape them off then do some UT.

This is not good advice. Do not do this unless the system is very low pressure and the process contained is not dangerous. Believe it or not, a little bit of scale can block a through-wall leak even with high pressure.

Simply perform Long Range Ultrasonic Testing or Pulse Eddy Current Inspection if the system is online.

 

[LittleInch]

Hence why you use the long screwdiver.....

If its that bad at least you're there when it fails rather than the night shift.

Or fit a clamp....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[mariolucas75]

Dear All,

Thank you very much....