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Technical Discussions
steve hornby
steve hornby
01:41 Mar-03-2004
equivalent wire IQI sensitivity

If an ASME plague type penetrameter of a thickness of 2% of the specimen thickness under test is used and the 4T hole is the only hole visible is it right to claim 2% IQI sensitivity. Article 2 of ASME 5 in the appendix section appears to bear this fact up in the wire equivalence table however having talked to various people in the UK they seem to indicate that the 2T hole must be seen even if a plague thickness representing 2% is used. The 4T hole would only indicate a sensitivity of around 2.6%. Can anybody give me further guideance or is this a long standing difference in interpretation between US & European thinking


    
 
 
Sasaki
Sasaki
01:27 Mar-04-2004
Re: equivalent wire IQI sensitivity
US standards define the acceptance IQI sensitivity in term of e.g. "2-2T" in which "2" stands for the thickness of IQI with regard to the "material" thickness of interest and "2T" denotes "the hole size of the IQI" is what I have been understanding until now.

Regards,


    
 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
09:45 Mar-11-2004
Re: equivalent wire IQI sensitivity
You are correct and most Europeans do not read the code properly plus they are hung up on the figure 2% sensitivity which does not appear anywhere in ASME.

ASME is quite clear it tells you you must see a specified hole on a specified thickness. The equivelent penetrameter sensitivity table goes on to say that when you do not have the correct hole IQI you can use the one listed in the EPS Table. Simple no calculations involved.


    
 
 
ilyes
ilyes
03:27 Oct-27-2004
Re: equivalent wire IQI sensitivity
----------- Start Original Message -----------
:
: Two percent sensitivity is the actual IQI, 2% of the tickness, remember you need to see three sides of the IQI, the 2T hole then is the quality level.
: Exerpt from ASME Section V, Article 22
:
: The quality level usually required for radiography
: is 2% (2-2T when using hole type IQI) unless a higher
: or lower quality is agreed upon between the purchaser
: and the supplier. At the 2% subject contrast level, three quality levels of inspection, 2-1T, 2-2T, and 2-4T, are available through the design and application of the IQI (Practice E 1025, Table 1). Other levels of inspection are available in Practice E 1025, Table 1. The level of inspection specified should be based on the service requirements of the product. Great care should be taken in specifying quality levels 2-1T, 1-1T, and 1-2T byഊSE-94 ARTICLE 22 — RADIOGRAPHIC STANDARDS first determining that these quality levels can be main-tained in production radiography.
:: If an ASME plague type penetrameter of a thickness of 2% of the specimen thickness under test is used and the 4T hole is the only hole visible is it right to claim 2% IQI sensitivity. Article 2 of ASME 5 in the appendix section appears to bear this fact up in the wire equivalence table however having talked to various people in the UK they seem to indicate that the 2T hole must be seen even if a plague thickness representing 2% is used. The 4T hole would only indicate a sensitivity of around 2.6%. Can anybody give me further guideance or is this a long standing difference in interpretation between US & European thinking
------------ End Original Message ------------




    
 
 
william brennan
william brennan
04:10 Dec-13-2004
IQI Wires and vynal plasic
----------- Start Original Message -----------
: If an ASME plague type penetrameter of a thickness of 2% of the specimen thickness under test is used and the 4T hole is the only hole visible is it right to claim 2% IQI sensitivity. Article 2 of ASME 5 in the appendix section appears to bear this fact up in the wire equivalence table however having talked to various people in the UK they seem to indicate that the 2T hole must be seen even if a plague thickness representing 2% is used. The 4T hole would only indicate a sensitivity of around 2.6%. Can anybody give me further guideance or is this a long standing difference in interpretation between US & European thinking
------------ End Original Message ------------

Can anybody point me in the right direction for finding a supplier of wires,plastic and laminators for making IQI's?



    
 
 

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