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Technical Discussions
Michael Williams
Michael Williams
12:41 Jul-30-2014
IQI (when to use 2 on a single graph?)

Hi,
Im hoping someone can help me out. I've looked through asme viii and asme v and it tells you how to place the IQI (perpendicular to the weld) but it doesn't tell you where to place it (i.e one in the middle or 1 at either end of the graph). I was hoping someone could verify this for me?
Thanks in advance
Regards
Mike

 
 Reply 
 
Tim
Tim
14:41 Jul-30-2014
Re: IQI (when to use 2 on a single graph?)
In Reply to Michael Williams at 12:41 Jul-30-2014 (Opening).

Keep in mind that the use of IQI is to prove sensitivity in the Area Of Interest. It is generally a good idea to prove at the middle and near the end of the AOI.

Also, more than one may be needed if a shim is necessary when using penetrameter vs. wire.

 
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jaimin
NDT Inspector, NDT LeveL-III @ UIC, KSA
Saudi Arabia, Joined Dec 2012, 100

jaimin

NDT Inspector, NDT LeveL-III @ UIC, KSA
Saudi Arabia,
Joined Dec 2012
100
07:42 Jul-31-2014
Re: IQI (when to use 2 on a single graph?)
In Reply to Michael Williams at 12:41 Jul-30-2014 (Opening).

Dear micjael,

1. as i know it shall be placed where radiation is reaching less( of course at the end of segment of your film).
2. asme also specify that u have to put 2 iqi when there is lot change in density to find that whether sensitivity achived or not.

regards,
jaimin patel

 
 Reply 
 
Michael Williams
Michael Williams
13:01 Jul-31-2014
Re: IQI (when to use 2 on a single graph?)
In Reply to jaimin at 07:42 Jul-31-2014 .

Hi,
Thanks for the replies, I'm using 10x40 films so I'll put one on either end

 
 Reply 
 
Dave Dent
NDT Inspector,
Nigeria, Joined Jan 2014, 2

Dave Dent

NDT Inspector,
Nigeria,
Joined Jan 2014
2
15:43 Aug-04-2014
Re: IQI (when to use 2 on a single graph?)
In Reply to Michael Williams at 13:01 Jul-31-2014 .

When you place the IQI on the film, make sure that they are with in 25mm of the DFL and the thinnest wire is to the outside

 
 Reply 
 
Narasimha Rao
Narasimha Rao
07:43 Aug-05-2014
Re: IQI (when to use 2 on a single graph?)
In Reply to Michael Williams at 12:41 Jul-30-2014 (Opening).

Hi Michael,

you didn't mentioned which type of IQI you are going to use,in case if you are using wire type IQI for weld joint IQI shall be kept across the weld 1/8 inch away from the weld edge.

If you are using hole type IQI shall be kept parallel to the weld and 1/8 inch away from weld edge.
In panoramic technique we need to use 4IQI 90degrees apart.
If thickness difference more then more than 1 IQI is required.
When the density varies from the location IQI by greater than (-15% to 30%) then another IQI is required.

Regards,
M.Narasimha Rao
NDT Engineer
INDIA.

 
 Reply 
 

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