Wow! Fantastic invention , couldn't believe this kind of calibration blocks would exist 😳. So those SDHs are actually curved following the inside contour of the pipe, right?. May I ask some newbie questions? 😅, how I'm supposed to calibrate for previous steps, Wedge Angle, delay, velocity, and sensitivity? What cal. Block should I use for a curved Wedge, it doesn't makes sense to calibrate on a flat IIW block 🙄
@@hollowayndtengineeringinc.5201 Thanks a lot for your great videos, really appreciate your time and efforts, God bless you 🙏🏻. Still though, I can't get it right, I tried to calibrate the distance on a notch carved in 8" pipe, but I'm not sure if it is accurate enough :( What would you advice me to calibrate the distance /velocity on? Depth, surface distance or beam path?
Excelente video, sería fascinante si dieras una explicación del criterio de aceptación de ASME SECC VIII div 2, en específico a un espesor mayor de 1" . Saludos!
Hi Paul thanks for explaining this, just there is one question in my mind about PACS calibration block What different if we make TCG by using PACS calibration block instead of ERVW and make the scanning surface of the PACS curvature as NPS of the pipe
Hi Al, the PACS block is just one thickness and does not have the requisite hole size required by ASME. So even if you contoured the top and bottom it would still not be compliant.
Hey Paul, I'm learning PAUT. We were doing TCG cals today on the veo3 on 1.5mm SDH. After completing the TCG we were confused that the maxed A-scan signal from the reflectors is breaking TCG, just like in your video at around 4:01. I have my PAUT course soon but do you know why this is the case? Great video and sorry for taking up your time!! Cheers - Doug 🏴
@@DoogHoneyman no stupid questions! :) So the TCG curve is not a DAC curve. If it were a DAC, then you are right the A-scans would peak up at the line and not go above. But the TCG curve is simply a reference line that shows the dB adjustment at different sound paths. The idea is that with the TCG, they will peak at a consistent screen level (usually 80%) after you're done. Which, if you overlay the TCG curve (which is *not* a flat line at 80%), you'll see why the A-scan peaks at 80% will be higher than the TCG line.
Thank you... Paul for wonderful explanation for TCG IN PAUT. In conventional UT, we all mainly use DAC method for examination. Now my question is "whether an indication whose amplitude is 20% DAC is equal to 20% TCG ?"
If you don't mind could you explain? There is no standard for this, for example iso 13588 referred to iso 17640 , but this is manual ultrasonic and saying use the same probe which are performing UT .
Thank you for the rad videos. Are you using a concave wedge or is it flat? What would you suggest as the best wedge to use when scanning Scanning a 6” pipe of 1”WT.?
Hi Jason, that was a curved wedge. I always recommend using a wedge contoured exactly to the examination surface. So in the case of a 6 inch pipe, that would be 6.625 inches. It isn't always practical to be carrying around wedges for every pipe size, so feel free to use the tolerances introduced in 2017 in the ASME code. I wrote an article on that here: www.hollowayndt.com/news/2018/10/22/making-sense-of-wedge-curvature-according-to-asme-sec-v-article-4
Hi Paul, thank you for all information, there is on question , is the ERVW blocks have a different outside diameter to covers inspect variable piping outside diameter ?? for example how can the medium ERVW block covers 6",8",10" ??
hi, excelent video, could you pass me the block diagram? i wanna make one block too, and another question, could you please make a video calibration speed, wedge delay and sensivity for pipe inspection, i am new in all that, but i really want the block diagram if you could pass it please
hello, if I need to calibrate sensitivity with a notch reflector? how can I select that from the device because the device has three reflector types Radius, thickness, and depth SDH ??
Those reflector types are not for setting a TCG. Those are typically used for time base calibrations. I would advise you to get some assistance from your supervisor or Level 3.
![KAYTRANADA - Witchy (feat. Childish Gambino) [Official Video]](http://i.ytimg.com/vi/jGK3YVmGZ3Y/mqdefault.jpg)
Excellent video! PAUT for me since 1999 -- and a guitar riff to boot :)
Always a pleasure to watch you videos. 👍👍
That was cool Paul. 👍
Wow! Fantastic invention , couldn't believe this kind of calibration blocks would exist 😳. So those SDHs are actually curved following the inside contour of the pipe, right?.
May I ask some newbie questions? 😅, how I'm supposed to calibrate for previous steps, Wedge Angle, delay, velocity, and sensitivity? What cal. Block should I use for a curved Wedge, it doesn't makes sense to calibrate on a flat IIW block 🙄
Hi there, for a more in depth look at the ERVW blocks, there's this video. Hope it answers your questions!
ruclips.net/video/3sV-LQKfe5Y/видео.html
@@hollowayndtengineeringinc.5201 Thanks a lot for your great videos, really appreciate your time and efforts, God bless you 🙏🏻. Still though, I can't get it right, I tried to calibrate the distance on a notch carved in 8" pipe, but I'm not sure if it is accurate enough :(
What would you advice me to calibrate the distance /velocity on? Depth, surface distance or beam path?
Excelente video, sería fascinante si dieras una explicación del criterio de aceptación de ASME SECC VIII div 2, en específico a un espesor mayor de 1" . Saludos!
Someday!
Hi Paul thanks for explaining this, can you explain wedge delay calibration angle wedge calibration on sonatest thank you.
Hi Santiago, yup I sure can... but I think Sonatest has those videos available already.
Try this one: ruclips.net/video/UOibHGwUy8Q/видео.html
Hi Paul thanks for explaining this, just there is one question in my mind about PACS calibration block
What different if we make TCG by using PACS calibration block instead of ERVW and make the scanning surface of the PACS curvature as NPS of the pipe
Hi Al, the PACS block is just one thickness and does not have the requisite hole size required by ASME. So even if you contoured the top and bottom it would still not be compliant.
Hey Paul, I'm learning PAUT. We were doing TCG cals today on the veo3 on 1.5mm SDH. After completing the TCG we were confused that the maxed A-scan signal from the reflectors is breaking TCG, just like in your video at around 4:01. I have my PAUT course soon but do you know why this is the case? Great video and sorry for taking up your time!! Cheers - Doug 🏴
Also to add, the ref gain stays the same so not sure why the amplitude is above TCG. Aware this could be a stupid question 😂
@@DoogHoneyman no stupid questions! :) So the TCG curve is not a DAC curve. If it were a DAC, then you are right the A-scans would peak up at the line and not go above. But the TCG curve is simply a reference line that shows the dB adjustment at different sound paths. The idea is that with the TCG, they will peak at a consistent screen level (usually 80%) after you're done. Which, if you overlay the TCG curve (which is *not* a flat line at 80%), you'll see why the A-scan peaks at 80% will be higher than the TCG line.
Understood, I think, still thinking about this one actually. Thank you!! 🙌
Thank you... Paul for wonderful explanation for TCG IN PAUT.
In conventional UT, we all mainly use DAC method for examination. Now my question is "whether an indication whose amplitude is 20% DAC is equal to 20% TCG ?"
Yes it is.
Does your procedure explicitly state DAC? Why not use TCG instead?
@@hollowayndtengineeringinc.5201 it specify as "reference level"
20 percent of TCG, would equate to 16%, as 10% of a Ref(80%) would equal 8%, and you can do the math from there...
@@emanuelchavez8444 thanks..
Hi Paul, Have you ever do transfer correction with a phased array device?
Yes, but it's quite complicated
If you don't mind could you explain? There is no standard for this, for example iso 13588 referred to iso 17640 , but this is manual ultrasonic and saying use the same probe which are performing UT .
For ASME Piping use Notch or we can use SDH?? Then in mx2, can we made TCG with manual (Custom) TCG?
Thanks
You can use notches or SDH as per the code.
Thank you for the rad videos.
Are you using a concave wedge or is it flat?
What would you suggest as the best wedge to use when scanning Scanning a 6” pipe of 1”WT.?
Hi Jason, that was a curved wedge.
I always recommend using a wedge contoured exactly to the examination surface. So in the case of a 6 inch pipe, that would be 6.625 inches. It isn't always practical to be carrying around wedges for every pipe size, so feel free to use the tolerances introduced in 2017 in the ASME code.
I wrote an article on that here: www.hollowayndt.com/news/2018/10/22/making-sense-of-wedge-curvature-according-to-asme-sec-v-article-4
Hi Paul, thank you for all information, there is on question , is the ERVW blocks have a different outside diameter to covers inspect variable piping outside diameter ?? for example how can the medium ERVW block covers 6",8",10" ??
If your watch the calibration block sizing video it will help.
hi, excelent video, could you pass me the block diagram? i wanna make one block too, and another question, could you please make a video calibration speed, wedge delay and sensivity for pipe inspection, i am new in all that, but i really want the block diagram if you could pass it please
The block design is patented, so I can't share it. And I will do a pipe calibration video at some point. Thanks for watching!
@@hollowayndtengineeringinc.5201 ok thanks, another question, do you have videos about tofd calibration ?
How did you make that cal piece, was it welded or completely CNC
PH Tool makes them. ERVW blocks, completely wire cut.
I'm sure you did the accelerated beat yourself :P
Actually I ripped it from an old instrumental album! Intro to first track on Liquid Tension Experiment.
lol Funny, the number 2 album is my favorite! I always listen to Orion from Metallica when I am in that mood.
hello, if I need to calibrate sensitivity with a notch reflector? how can I select that from the device because the device has three reflector types Radius, thickness, and depth SDH ??
Those reflector types are not for setting a TCG. Those are typically used for time base calibrations. I would advise you to get some assistance from your supervisor or Level 3.
TCG 캘리브레이션 시간 꽤나 걸림 그래도 지금은 5분컷