IQI Wire Selection

[Richard robes]

Gent's,

Please give me some information regarding RT wire selection criteria. Pipeline job, code API 1104, Material -  Stainless steel.

Calculated Essential Wire number diameter is 0.16 and i got the wire number as 14th from the chart. From these data's how could i get the least visible wire to be seen on the radiograph?

Regards

Richard

[perumal govindan]

Mr. Richard,

Bit confused your calculation of wire diameter and wire number, please provide your wall thickness of Line Pipe then will calculate the required sensitivity / wire number to be visible on radiography film.

P Govindan

Richard

--
To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
 
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

[Richard robes]

Dear P Govindan,

Thanks for the reply, Wall thickness is 4.8mm, Film side, Single wall single image technique.

Regards

Richard

[perumal govindan]

Dear Mr. Richard,

If the wall thickness is 4.8mm, then the material thickness will be 4.8+ 1.6 (capping thick. / reinforcement) + 1.0 (root projection) = 7.4 mm. 

As per API STANDARD 1104, 12th Edition, Table 6- Weld Thickness Vs Diameter of ISO Wire Type IQI. If DIN Penetrameter (10 ISO 16) set used for 7.4 mm material thickness, the minimum visible wire is 13 (thick: 0.20 mm or 0.0078 inch). WIRE 13 SHALL BE CONSIDERED DUE TO LOWER MATERIAL THICKNESS.

Penetrameter sensitivity (ISO Penetrameter): 0.20/7.4 X 100 = 2.7%

Further, refer ASME Section V NDE: 2001 Edition, Article 2 Radiographic Examination, Table T-276 IQI Selection and T-233.2 Wire IQI Designation, Wire Diameter and Wire Identity, ASTM Set A Penetrameter minimum visible wire is 5 (thick: 0.20 mm or 0.008 inch). 

Penetrameter sensitivity (ASTM Penetrameter): 0.20/7.4 X 100 = 2.7%

Hope this clarifies........

P Govindan

[perumal govindan]

Dear Mr. Richards,

From Penetrameter 10 ISO 16, if your radiography is good you may visualize the wires numbers from 10, 11, 12 and 13 is acceptable and further if you find remaining wires 14, 15 and 16 the quality of the radiography is excellent. 

If in the radiography film 14th wire is visible your radiography quality is satisfactory and the penetrameter sensitivity: 0.16/7.4 x 100 = 2.16%.

P Govindan 

On Mon, Jul 15, 2013 at 5:30 PM, Richard robes <mech.pr...@gmail.com> wrote:

Richard

--

[rsmoh...@gmail.com]

Dear Richard,

Herewith i attached one IQI section table for reference i think it may clear your requirement.

Regards,

Mohan.R