Why xray are use for lower thickness
Prasad Rode
Why xray are commonly used for thickness of material 5mm and below.
Is gamma ray, will take more exposure time. Or any other good technical reason.
Regards
Prasad
George Dilintas
Prasad
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prem_nautiyal26
Why xray are commonly used for thickness of material 5mm and below.
Is gamma ray, will take more exposure time. Or any other good technical reason.
Regards
Prasad
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Prasad Rode
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
Raju Kandula
Radiographs with x Ray have high definition and good weld image for review compared to gamma ray
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George Dilintas
Prasad
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Kannayeram Gnanapandithan
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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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anthony chundal
Regards
Prasad
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Prasad Rode
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
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Perumal Govindan
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
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pgoswami
Hello Everyone,
I think some back to basics/fundamentals are required to understand which way to proceed, X-Ray or Gamma Ray for radiography. Source intensity vs. required contrast/density is always a challenge to any radiographer. Skilled radiographer could easily manipulate those with experience.
For a thickness of 4 mm, X-Ray would be the way to go, not the Gamma Ray, due to its high intensity and failure to get the right contrast. If isotopes are to be chosen, certainly it WILL NOT be not Ir-192
This paper highlights all the merits/demerits of both the techniques and is worth reading.
Thanks.
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineering Specialist ,
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Prasad Rode
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lab
Dear Mr. Prasad,
Please refer clause no. 7.2 of ISO 17636-2 titled as Choice of tube voltage and radiation source. This standard guides you to select appropriate X ray equipment or gamma ray source for different thickness of different materials.
Regards,
A Meganathan
Kochi
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Prasad Rode
Sent: Wednesday, November 16, 2016 6:58 PM
To: material...@googlegroups.com
Subject: Re: [MW:25723] Why xray are use for lower thickness
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" <kgpan...@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 <puro...@gmail.com> wrote:
This message is
eligible for Automatic Cleanup! (puro...@gmail.com) Add cleanup rule | More info
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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Subject: Re: [MW:25730] Why xray are use for lower thickness
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