Saturday, June 5, 2010

Re: [MW:5388] Thickness for impact testing

Hi ,
      sorry for my belated comment  on this query
ASME B 31.3 thickness range(323.3.1) is applicable in case of Impact Test is applicable as per 
ASME B 31.3 otherwise the thickness range for PQR is as per ASME Sec-IX. 

Regards,
Vaithiyanathan
QA Engineer,
WorleyParsons Arabian Industries(JV)
Oman.


On Wed, May 26, 2010 at 10:31 AM, manpreet <manpreetsin88@rediffmail.com> wrote:
Dear All

My case is


Material- Low carbon steel
Applicable code: ASME B 31.3

According to ASME IX QW-403.6, the minimum base metal thickness qulified is the thickness of test coupon T or 0.625" (5/8"), whichever is less. That is 0.5". Therefore, the thickness range 0.25"-0.5" is not qualified.

But the vendor pointed out the the qualified thickness range can based on fabrication code B31.3 Table 323.3.1 which indicates that qualifed thickness range is T/2 to T+0.25".

In this case, what is the minimum qulified thickness: 0.25" or 0.5"? Please advise.

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With Best Regards

B.Vaithiyanathan

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