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- since 1996 -

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Technical Discussions
vivek
India, Joined Dec 2015, 5

vivek

India,
Joined Dec 2015
5
04:45 Jan-02-2016
UT OF PIPING ABOVE 20 INCHES

Dear Experts,

happy new year,

i have a doubt, we have to do UT on pipe 24'',12.70 mm size. we have a calibration block of 36'', 12.70 mm size. can we use this calibration block as a reference block?

 
 Reply 
 
Andreas
NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh, Germany, Joined Oct 1999, 131

Andreas

NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh,
Germany,
Joined Oct 1999
131
08:27 Jan-02-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to vivek at 04:45 Jan-02-2016 (Opening).

Hallo Vivek,
you must more specific.
If you check for transverse defects only , it should be not a problem, because it is the same wall thickness.

Then what is the requirement of the specification you are using.


Regards

Andreas

 
 Reply 
 
vivek
India, Joined Dec 2015, 5

vivek

India,
Joined Dec 2015
5
10:04 Jan-02-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to Andreas at 08:27 Jan-02-2016 .

Mr. Andreas,

we are doing UT as per SEC V and our acceptance criteria is B31.3.

 
 Reply 
 
Diego
Consultant,
Freelance, Spain, Joined May 2013, 200

Diego

Consultant,
Freelance,
Spain,
Joined May 2013
200
14:00 Jan-02-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to vivek at 04:45 Jan-02-2016 (Opening).

Hi Vivek
It is right if T-434.1.2, T-434.1.5 and T-434.1.6 are fulfiled. If T-434.1.5 is not fulfiled , then ASME B31.3, 344.6.1 may be used.

 
 Reply 
 
vivek
India, Joined Dec 2015, 5

vivek

India,
Joined Dec 2015
5
15:05 Jan-02-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to Diego at 14:00 Jan-02-2016 .

Dear Mr. Diego,

the requirements of T-434.1.2, T-434.1.5 and T-434.1.6 are fulfilled.

my doubt is about T-434.1.7.1. which says-- for examination in materials where examination surface diameter is greater than 20''(500 mm), a block of essentially same curvature, or alternatively, a flat basic calibration block, may be used.

is it means that i shall use same curvature or flat block?
or i can used any block which is above 20'' in diameter and fulfills the requirements of T- 434.3.?

 
 Reply 
 
Diego
Consultant,
Freelance, Spain, Joined May 2013, 200

Diego

Consultant,
Freelance,
Spain,
Joined May 2013
200
17:38 Jan-02-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to vivek at 15:05 Jan-02-2016 .

Mr. Vivek.
In accordance with T-434.3, I think that it is permittede to employ a flat block.

 
 Reply 
 
Diego
Consultant,
Freelance, Spain, Joined May 2013, 200

Diego

Consultant,
Freelance,
Spain,
Joined May 2013
200
17:56 Jan-02-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to Diego at 17:38 Jan-02-2016 .

Mr. Vivek.
Further to my previous post. I see no objection to use the calibration block of 36" as reference block also

 
 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
09:42 Jan-03-2016
Re: UT OF PIPING ABOVE 20 INCHES
In Reply to vivek at 15:05 Jan-02-2016 .

Hi Vivek
T434.1.7 means that you can use either one. A curved block "or" a flat block, your choice

 
 Reply 
 

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