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Technical Discussions
Varghese
Varghese
01:52 Oct-05-2008
ASME Calibration block for piping

For UT shear wave weld inspection of Circumferential joints on piping( OD less than 20"), is it necessary to have curved calibration blocks for DAC? Shall we use the the basic calibration block given in ASME ,T-434.2?




    
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1261

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1261
05:05 Oct-05-2008
Re: ASME Calibration block for piping
Varghese
Please go back to ASME Sec V Art 4 para 434.1.7 where you read about the Materials With Diameters Greater than 20 inch. That paragraph (T-434.1.7) is titled Block Curvature (Except for Piping).
The provision to use a flat plate is NOT part of the Piping Calibration Block options!

For Piping, you go to T-434.3 where you read that you must use a section of pipe of the same nominal size and schedule.

Ed

----------- Start Original Message -----------
: For UT shear wave weld inspection of Circumferential joints on piping( OD less than 20"), is it necessary to have curved calibration blocks for DAC? Shall we use the the basic calibration block given in ASME ,T-434.2?
------------ End Original Message ------------




    
 
 Reply 
 
N.Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N.Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
06:22 Oct-06-2008
Re: ASME Calibration block for piping
Yes, It is required to make ID and OD notch block from the pipe of same material if your referencing code is ASME Sec.V. The usable range of the block is 0.9Diameter to 1.5Diameter of calibration block.

Flat block with SDH is acceptable if you use BSEN or AS and RP2X (for tubular structural welds)

Rgds,

nksamy

----------- Start Original Message -----------
: For UT shear wave weld inspection of Circumferential joints on piping( OD less than 20"), is it necessary to have curved calibration blocks for DAC? Shall we use the the basic calibration block given in ASME ,T-434.2?
------------ End Original Message ------------




    
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1261

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1261
02:38 Oct-06-2008
Re: ASME Calibration block for piping
Mr Kuppusamy:
Please note the reference to Art 4 in my previous reply on this thread!!
The block curvature table in Fig T-434.1.7.2 is referenced from the section T-434.1.7 where it states Block Curvature EXCEPT FOR PIPING!

There is no such povision of 0,9-1,5 diameters for Piping. You read in T-434.3 the reqquirements for the Piping calibration blocks. There it states you SHALL use a section of pipe of the same size and schedule. In regards to pipe in this case SIZE means diameter! So you MAY NOT use a different diameter pipe.

Regards

----------- Start Original Message -----------
: Yes, It is required to make ID and OD notch block from the pipe of same material if your referencing code is ASME Sec.V. The usable range of the block is 0.9Diameter to 1.5Diameter of calibration block.
: Flat block with SDH is acceptable if you use BSEN or AS and RP2X (for tubular structural welds)
: Rgds,
: nksamy
: : For UT shear wave weld inspection of Circumferential joints on piping( OD less than 20"), is it necessary to have curved calibration blocks for DAC? Shall we use the the basic calibration block given in ASME ,T-434.2?
------------ End Original Message ------------




    
 
 Reply 
 
N.Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N.Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
04:08 Oct-06-2008
Re: ASME Calibration block for piping
Ed Ginzel,

Yes, you are correct. I refered wrong paragraph of Article-4 regarding the useful range.

Regards,

nks


: : Flat block with SDH is acceptable if you use BSEN or AS and RP2X (for tubular structural welds)
: : Rgds,
: : nksamy
: : : For UT shear wave weld inspection of Circumferential joints on piping( OD less than 20"), is it necessary to have curved calibration blocks for DAC? Shall we use the the basic calibration block given in ASME ,T-434.2?
------------ End Original Message ------------




    
 
 Reply 
 
sibu
NDT Inspector,
contractor staff at punj lloyd ltd, India, Joined Mar 2016, 27

sibu

NDT Inspector,
contractor staff at punj lloyd ltd,
India,
Joined Mar 2016
27
03:42 May-17-2016
Re: ASME Calibration block for piping
In Reply to Ed Ginzel at 02:38 Oct-06-2008 .

I have one doubt, my question is why ASME sec telling choose curvature with limit of 0.9 to 1.5
And depends upon which one they are taking this 0.9 to 1.5 , why we can't go beyond this limit , I need reason for taking that limit
I hope u understood my point of view...
By
Sibu.

    
 
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