NDE Methods for Insulated Plant Piping
NDE Methods for Insulated Plant Piping
(OP)
We have a 10" CS line carrying sweet wet natural gas with a significant concentration of CO2. The line is insulated and runs at an elevation of 5 to 6 meters on supports for approximately 400 meters. Significant corrosion is expected in this line, despite dosing of anti corrosion agent.
We have previously done UT, which turned out to be very expensive due to the need of stripping the insulation and installing the scaffolding.
If anybody knows of advances in NDE which could allow testing of the line (while the plant is running) without the need of stripping the insulation, it would be a great help.
We have previously done UT, which turned out to be very expensive due to the need of stripping the insulation and installing the scaffolding.
If anybody knows of advances in NDE which could allow testing of the line (while the plant is running) without the need of stripping the insulation, it would be a great help.





RE: NDE Methods for Insulated Plant Piping
RE: NDE Methods for Insulated Plant Piping
RE: NDE Methods for Insulated Plant Piping
RE: NDE Methods for Insulated Plant Piping
http://www.ndt.net/article/ecndt02/251/251.htm
RE: NDE Methods for Insulated Plant Piping
http://www.forgoodpower.com/fieldinspections.html
RE: NDE Methods for Insulated Plant Piping
What were the results from the UT already performed?
Perhaps you are referring to corrosion under insulation (CUI) which will occur on the outside of the pipe. If this is the case, challenge the process engineers as to the need for insulation in the first place. If it cannot be totally justified, get rid of it. If the need for it is maintained, ensure that there is a quality coating on the pipe before the insulation goes on. Even with this approach, expect to have the insulation off again after 10 years to fully inspect and maintain the coating.
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: NDE Methods for Insulated Plant Piping
Guided Wave
RE: NDE Methods for Insulated Plant Piping
We have also used a real time X-Ray instrument to check for external corrosion under insulation.
RE: NDE Methods for Insulated Plant Piping
They have invested thousands in this subject.
Look in to it.
www.mti-global.org
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: NDE Methods for Insulated Plant Piping
More info on ndt.com
RE: NDE Methods for Insulated Plant Piping
Both methods are volumetric assessments where general wall loss is decectable but isolated pitting is difficult to detect.
RE: NDE Methods for Insulated Plant Piping
RE: NDE Methods for Insulated Plant Piping
RE: NDE Methods for Insulated Plant Piping