Thank you Mr.Karanth for excellent information.
Anyway as per catagory we cannot cover 100% RT,but we have to avoid such a things during welding.In GTAW process,how pin holes will occur..?
Dinesh.
From: shankar narayan karanth <karanthequipments@gmail.com>
To: materials-welding@googlegroups.com
Sent: Sunday, December 25, 2011 4:57 PM
Subject: Re: [MW:13308] Hydro testing failure
To: materials-welding@googlegroups.com
Sent: Sunday, December 25, 2011 4:57 PM
Subject: Re: [MW:13308] Hydro testing failure
Dear Shankar,
It looks that there are pin holes which you might have considered them to be rounded indication with in the limits of acceptance while Radiography interpretation.When optical density of rounded indication is quite high, you have to suspect them to be pin holes and had you carried PT on them it is quite likely that you have detected the defects.It is quite likely that very small rounded indications may not get picked up while carrying out MT. Hope this has answered your query.
P.S.Karanth
98251 29987
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It looks that there are pin holes which you might have considered them to be rounded indication with in the limits of acceptance while Radiography interpretation.When optical density of rounded indication is quite high, you have to suspect them to be pin holes and had you carried PT on them it is quite likely that you have detected the defects.It is quite likely that very small rounded indications may not get picked up while carrying out MT. Hope this has answered your query.
P.S.Karanth
98251 29987
On Sun, Dec 25, 2011 at 5:41 PM, Dick Overkleeft <dick.overkleeft@gmail.com> wrote:
Dear Mr. Shankar,Could you please sent some more information?Can you inform us what kind of stainless steel you applied.What welding process you used, and which filler material.Is it plate or tube welding.What kind of water ( is there any chlorid in the water) did you use for hydrotesting and did you air test before hydrotesting.What kind of defects did you see on the X-ray?After this we might be able to give an answer on your question.bets regards,Dick Overkleeft EWEBureau Veritas2011/12/24 Dinesh Ravi Shankar <dinesh_ravi2001@yahoo.com>
--Dear friends,During hydro testing of stainless steel, recently 2 tests leak occurred at welded joint area. I verified RT films, PMI reports...etc.Just I want to find root cause.Please advise me that what proactive surveillance need to take of further hydro test failure & how it is happening..?Thank you & Best Regards,
S. Dinesh Ravi Shankar.
Mechanical Inspector,
Saudi Aramco Project Inspection Division (SAPID),
Manifa Core Hydrocarbon Facilities Project.Kingdom of Saudi Arabia.,Mobile : +966 568059765,
Tel : +966 3 379 2018.
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