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Technical Discussions
Steve
Steve
04:29 Mar-25-2004
Calibration block for TKY joints???

What type of calibration block is required when doing TKY joints according to API RP 2X, hole size etc. Can you drill holes in a similar mock up or is it an ASME cal block. I read the recommended practice and it doesn't clearly lay it out. Appreciate any help.
Thanks.


    
 
 
Mankenberg
Consultant
USA, Joined Nov 2003, 9

Mankenberg

Consultant
USA,
Joined Nov 2003
9
06:31 Mar-25-2004
Re: Calibration block for TKY joints???
----------- Start Original Message -----------
: What type of calibration block is required when doing TKY joints according to API RP 2X, hole size etc. Can you drill holes in a similar mock up or is it an ASME cal block. I read the recommended practice and it doesn't clearly lay it out. Appreciate any help.
: Thanks.
------------ End Original Message ------------

RP-2X is not crystal clear. You need to get inferences from other areas, such as for instance in the acceptance criteria sections, where they speak of disregard levels.
For TKYs you will have something similar to an ASME basic block (you need to construct DAC curves) with SDHs (for the body of the weld) and with notches (for the "root area"). A bit of thought needs to go into the design and construction of your blocks, however.
If you look at Figure 43, for example, it specifies that "the ultrsonic specialist should determine the value of "T"..." (FYI, the "ultrasonic specialist" is defined in the document, and it is not the technician - it will be the Level III.) Because RP-2X requires transfer correction, most likely you will need a set of blocks with varying ranges of thicknesses, even though the hole sizes are the same. If you design your blocks well, you can also combine the Level A and Level C blocks (the hole sizes are the same) by strategic placement of the various notches.
Regards,
Mankenberg


    
 
 
Steve
Steve
00:52 Mar-26-2004
Re: Calibration block for TKY joints???
So from what I understand the cal block can be flat plate and does not require a curved calibration block.

I am curious about this because most procedures reference ASME Section V and it requires curved calibration blocks for pipe under 20 in. diameter.

Any thoughts?

----------- Start Original Message -----------
: : What type of calibration block is required when doing TKY joints according to API RP 2X, hole size etc. Can you drill holes in a similar mock up or is it an ASME cal block. I read the recommended practice and it doesn't clearly lay it out. Appreciate any help.
: : Thanks.
: RP-2X is not crystal clear. You need to get inferences from other areas, such as for instance in the acceptance criteria sections, where they speak of disregard levels.
: For TKYs you will have something similar to an ASME basic block (you need to construct DAC curves) with SDHs (for the body of the weld) and with notches (for the "root area"). A bit of thought needs to go into the design and construction of your blocks, however.
: If you look at Figure 43, for example, it specifies that "the ultrsonic specialist should determine the value of "T"..." (FYI, the "ultrasonic specialist" is defined in the document, and it is not the technician - it will be the Level III.) Because RP-2X requires transfer correction, most likely you will need a set of blocks with varying ranges of thicknesses, even though the hole sizes are the same. If you design your blocks well, you can also combine the Level A and Level C blocks (the hole sizes are the same) by strategic placement of the various notches.
: Regards,
: Mankenberg
------------ End Original Message ------------




    
 
 
Mankenberg
Consultant
USA, Joined Nov 2003, 9

Mankenberg

Consultant
USA,
Joined Nov 2003
9
02:27 Mar-27-2004
Re: Calibration block for TKY joints???
RP-2X does not require curved calibration standards. They compensate for this with transfer correction (ref 7.7.4 where they speak of "contact area").
Mankenberg

----------- Start Original Message -----------
: So from what I understand the cal block can be flat plate and does not require a curved calibration block.
: I am curious about this because most procedures reference ASME Section V and it requires curved calibration blocks for pipe under 20 in. diameter.
: Any thoughts?
: : : What type of calibration block is required when doing TKY joints according to API RP 2X, hole size etc. Can you drill holes in a similar mock up or is it an ASME cal block. I read the recommended practice and it doesn't clearly lay it out. Appreciate any help.
: : : Thanks.
: : RP-2X is not crystal clear. You need to get inferences from other areas, such as for instance in the acceptance criteria sections, where they speak of disregard levels.
: : For TKYs you will have something similar to an ASME basic block (you need to construct DAC curves) with SDHs (for the body of the weld) and with notches (for the "root area"). A bit of thought needs to go into the design and construction of your blocks, however.
: : If you look at Figure 43, for example, it specifies that "the ultrsonic specialist should determine the value of "T"..." (FYI, the "ultrasonic specialist" is defined in the document, and it is not the technician - it will be the Level III.) Because RP-2X requires transfer correction, most likely you will need a set of blocks with varying ranges of thicknesses, even though the hole sizes are the same. If you design your blocks well, you can also combine the Level A and Level C blocks (the hole sizes are the same) by strategic placement of the various notches.
: : Regards,
: : Mankenberg
------------ End Original Message ------------




    
 
 
Gual Flores
Gual Flores
04:45 Nov-22-2013
Re: Calibration block for TKY joints???
In Reply to Mankenberg at 02:27 Mar-27-2004 .

Excuse me to interrupt you guys for a while because I have also a question regarding about the type of DAC that you will make it is also the same as you did in ASME that you need to make it into 80%, 40% and 20% or not? Also what is the difference about the Level A and Level C Blocks? thank you

    
 
 

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