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Re: [MW:4113] Pitting acceptance criteria

By Materials & Welding
dear sir anything biger than the calaberation notch wich is 1mm is a defect and i do believe it would be down to the welding engineer to make a desision as to wether or not to use the elbow i do bilieve that there is no specific area as to how much pitting would b allowed the decision would be yes or no or can the pitting b eliminated i.e repair welded as a welding inspector i would have some idea as to wether or not it way be used but would hafto come from a engineer and depending on what product would be going through the material
 
 
regards
mike.
----- Original Message -----
Sent: Wednesday, January 20, 2010 9:52 AM
Subject: [MW:4105] Pitting acceptance criteria

Dear all,
 
We received one 40" elbow (ASME 16.9) ASTM A 860 material having so much pitting on full external surface. Which standard we can refer for the acceptance criteria? 
 
 
I referred in ASTM A 860, its talks about only depth of surface discontinuity(5% of the nominal thickness),  there is no detail about the area of the pitting allowance.
 
Please help me on this issue. Very urgent
 
Regards,
 
Gulam Kader 

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