Re: [MW:12019] Roller marks

These roller marks may be dangerous if thermal cycle should be considered in design...

In general, if longitudinal stress (specially cyclic) are present, you may need to reconsider using these pipes...

These can be good "crack initiation sites"

If so, maybe smoothing with grinding may be helpful provided the depth doesn't exceed the maximum allowable depth according to your job specification...

Regards

Ramin  Kondori

   QC/Welding Engineer 

         IWE AT 0070

   

On Sun, Jul 31, 2011 at 5:25 PM, yash yagnik <yash2223@gmail.com> wrote:

Dear Navneet,

First of all this pipes are conforming to which code and standard?

U may check the thickness of the roller marks if it is going beyond your minimum thickness requirement then not acceptable.

If not than there is a provision that surface imperfection may be remvoed by grinding.

Regards

Yash

On Sun, Jul 31, 2011 at 7:17 PM, Suresh <bobsuresh24@gmail.com> wrote:

Mr .Navaneet,

 

If the Code ASME 31.3 ...,as long as the thickness is beyond the 12.5 % of wall thickness..It has  Acceptable ...

 

Go though the wall thickness one by one and make a decision as per ASME 31.3 Code requrement .

 

Thanks

 

Suresh

On Sun, Jul 31, 2011 at 2:20 PM, navanee kumar <dnkuit@gmail.com> wrote:

Dear Experts,

Is it acceptable roller marks on the pipe?

Please find attached photographs.

 
Thanks&Regards,
Navaneethakumar.D.
+971505583738

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Thanks  & Best Regards,

Suresh

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