Re: [MW:25734] Why xray are use for lower thickness

Hi Prasad

Based on my experience, radiographic source to be used is always mentioned in the Client NDT specification.

In case, if not mentioned you may go for Selenium-75 radiography source for better quality of radiography image.

Regards
Govindan

On 17 Nov 2016 06:08, "Prasad Rode" <purode333@gmail.com> wrote:

Dear Sir's,

I agree that , we get better quality of radiograph in xray.
I only want to discussed that,
1) If we want to talk about radiography quality, then if required IQI is visible, then we can say that minimum defects is visible as required IQI is visible.
Code also says that radiographs quality or acceptance, depends on visibility of require IQI.
2) my another point is that, in which section or code, it is mention, that below particular thickness of material, xray to be use and above that thickness, gamma is allowed. So that we can insist contractor to do the same.

Thanks for response.
Expecting the same.

Regards
Prasad

On Nov 16, 2016 17:39, "Kannayeram Gnanapandithan" <kgpandithan@gmail.com> wrote:

no, X-ray is the best one

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Wed, Nov 16, 2016 at 11:48 AM, Prasad Rode <purode333@gmail.com> wrote:

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Dear prem and George sir,

Thanks for reply.
I want to ask that if I use the high sourse ir192 and increase the exposure time i.e. time as required by calculation, can I get the good radiographs and using iqi of din standard.
Our thickness of pipe is below 4mm.
We required genuine and technical reason to insist to contractor.
Requesting for response.

Regards
Prasad

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