[MW:2217] RE: 2216] NDT for valve body welded

Hi!

When ever Overlay is carried for corrosion resistance purpose, This overlay thickness is not considered as strength purpose. Therefore criteria for overlay is for i)bonding ii) undiluted weld chemistry

For overlay weld Test required are i) Chemistry at level as per requirement ii) PT for barrier and final layer iii) UT for disbonding  confirmation ( Cracks are not allowed)

 

Regards

 

Hegde P.B.

 

+919714714803

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of gabsi fathi
Sent: Tuesday, May 19, 2009 8:21 PM
To: materials-welding@googlegroups.com
Subject: [MW:2216] NDT for valve body welded

 

dear ِِAll

 

As you  know some valve manufacturers use body seat which is welded i.e. stainless steel overlay welds over ductile iron body usin MIG welding process. the NDT method used to inspect the weld is PT. My question is this enough and accepted or you need additional NDT test such as UT.

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please let me know.

--
Meilleures Salutations.
Fathi Gabsi.

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