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Re: [MW:15729] PIPE- THICKNESS VARIATIONS

By Materials & Welding
Dear Mr. Kumar

It is possible for either cold drawn or hot drawn pipe to have thickness variation due to process itself, hence the tolerance is stated in the Codes.  Unless your customer specification is very clearly stating  about the thickness requirement as 9.53 mm minimum, the pipes within Code tolerances can be accepted. If you so desire, please ask your design department to recalculate the minimum required thickness to support your decisition to accept the pipes.

Regards

Gopu

--- On Sat, 20/10/12, Kumar kerala <sk7920541@gmail.com> wrote:

From: Kumar kerala <sk7920541@gmail.com>
Subject: [MW:15723] PIPE- THICKNESS VARIATIONS
To: materials-welding@googlegroups.com
Date: Saturday, 20 October, 2012, 2:48 PM

 
Dear members,
 
We have inspected some pipes (sizes from 12", 16" & 24" all schedule standard (9.53mm))....but it was observed that the thickness upon measurement is from 9.26mm to 9.3mm. the material is API-5L, Gr.B (PSL-1). eventhough the thicknesses are within the API- mill manufacturing tolerences, these are not matching with the Schedule required by drawings/client specifiactions. normally the physical thicknesses on pipe seen as more like 9.6, 9.7mm etc or even up to 10mm....but if it falls below the thickness written on the pipe itself, how could we assess this issue? opinions from all corners are appreciated. also, this may be very common issue with others, kindly share.
 
Thanks in advance
 
Kumar.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
 
 

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