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Technical Discussions
tuan adnan
tuan adnan
05:00 Sep-20-2008
Radiography interpratation Technique-IQI selection

hello guys...
i have some confusion.
1- when interprect elips film.. in order to calculate the sensitivity do we used single wall or 2t .. and is the thicness based on parent material or added with capping ..for example t =4 mm and capping 1.5 as percode... what is the requirement for IQI used.. will it be group A or group B for elips film

2- also on DWSI... for sensity calculation do we used single t or 2t... in order to make or used IQI selection.. please advise.. thank you in advance.


    
 
 Reply 
 
Collin Maloney
NDT Inspector, - Plant Inspector
Applus RTD, Australia, Joined Nov 2000, 147

Collin Maloney

NDT Inspector, - Plant Inspector
Applus RTD,
Australia,
Joined Nov 2000
147
05:55 Sep-20-2008
Re: Radiography interpratation Technique-IQI selection
----------- Start Original Message -----------
: hello guys...
: i have some confusion.
: 1- when interprect elips film.. in order to calculate the sensitivity do we used single wall or 2t .. and is the thicness based on parent material or added with capping ..for example t =4 mm and capping 1.5 as percode... what is the requirement for IQI used.. will it be group A or group B for elips film
: 2- also on DWSI... for sensity calculation do we used single t or 2t... in order to make or used IQI selection.. please advise.. thank you in advance.
------------ End Original Message ------------

Hi

Sensitivity is calculated on single wall thickness including weld cap against thinest wire visible in the weld. Subtract 1 wire if IQI positioned on film side.
Selection of IQI for DWSI is "t".


    
 
 Reply 
 
Juan Amado
Engineering, Inspection
Arco Industrial, S.A., Panama, Joined Nov 2001, 44

Juan Amado

Engineering, Inspection
Arco Industrial, S.A.,
Panama,
Joined Nov 2001
44
06:13 Sep-20-2008
Re: Radiography interpratation Technique-IQI selection
When using this technique (Double Side Double Exposure) it is important to remeber that even though youare looking at the front and back welds in a single film, you are evaluating the quality of a single thickness weld, and hence the required sensitivity level for the radiograph must be set according to that. This also means that in your Ug calculation you shall take into account the total diameter of the pipe, so that both sides of the weld (i.e. the one near the film and the one far away) will meet the Ug requirement.

----------- Start Original Message -----------
: : hello guys...
: : i have some confusion.
: : 1- when interprect elips film.. in order to calculate the sensitivity do we used single wall or 2t .. and is the thicness based on parent material or added with capping ..for example t =4 mm and capping 1.5 as percode... what is the requirement for IQI used.. will it be group A or group B for elips film
: : 2- also on DWSI... for sensity calculation do we used single t or 2t... in order to make or used IQI selection.. please advise.. thank you in advance.
: Hi
: Sensitivity is calculated on single wall thickness including weld cap against thinest wire visible in the weld. Subtract 1 wire if IQI positioned on film side.
: Selection of IQI for DWSI is "t".
------------ End Original Message ------------




    
 
 Reply 
 

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