Monday, February 25, 2013

RE: [MW:16867] Pitting Corrosion Resistance Failure in DSS

Dear Siva,

I would recommend that up to 8” Ø you could try the profile radiography technique,  this will give you the profile of both the internal and external walls. The remaining wall can be accurately calculated from the radiographs. Alternatively you can try long range UT, this requires removal of the insulation where the probe is attached and the results are reliable and accurate.

Regards

George V Aliyattukudy

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sivaselvam Ponandrum
Sent: 25 February 2013 10:50
To: materials-welding@googlegroups.com
Subject: RE: [MW:16862] Pitting Corrosion Resistance Failure in DSS

 

Dear George,

 

·         The Suspected corrosion will be internal

·         The piping will be  non-insulated and insulated

·         The diameter will range from 2” till 20”

 

Please advise suitable NDT methods.

 

Regards

 

Siva

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of George V Aliyattukudy
Sent: Sunday, February 24, 2013 4:03 PM
To: materials-welding@googlegroups.com
Subject: RE: [MW:16856] Pitting Corrosion Resistance Failure in DSS

 

Dear Siva,

There are screening NDE methods possible to detect corrosion, this will depend on the specific type of corrosion you are looking for;

·         is the suspected corrosion internal

·         is your piping insulated

·         what is the diameter of the pipe

I am saying this because methods like profile radiography is possible on small bore piping.

Regards

George V Aliyattukudy

HEAD OF INSPECTION

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sivaselvam Ponandrum
Sent: 24 February 2013 09:54
To: materials-welding@googlegroups.com
Subject: RE: [MW:16853] Pitting Corrosion Resistance Failure in DSS

 

Dear Paragpan,

 

What other NDT technique can be used to detect corrosion on the weld?

 

Is there a screening NDT technique (what NDT technique is this?)  prior doing detail NDT?

 

 

Regards

 

Siva

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of paragpan@gmail.com
Sent: Saturday, February 23, 2013 7:03 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:16847] Pitting Corrosion Resistance Failure in DSS

 

Dear Siva,

UT can detect the defects like crack, lack of fusion, LOP etc. in the weldment but not the
Corrosion.

Regards,
PARAG
Sent from my HTC

----- Reply message -----
From: "Sivaselvam Ponandrum" <sivaselvam@kpoc.com.my>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Subject: [MW:16841] Pitting Corrosion Resistance Failure in DSS
Date: Fri, Feb 22, 2013 4:17 PM

 

Dear Team,

 

Can UT Shear Wave detect corrosion at weld joint? Would this be a good screening tool?

 

 

Regards

 

Siva

 

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