🔥 NDT Dye Penetrant Demo

Today we are going to test some welds with the NDT process of Dye Penetrant.
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[slickmonkey]

When doing a PT inspection you need to apply more penetrant than you did in your video. Penetrant must extend past the grain boundary of the heat affected zone and not just be applied around the weld to have the ability to detect HAZ cracking from improper heat control

[bigshortstack]

you'd bet the cameraman's paycheck, huh? lolol. Excellent video, Bob. I think you are the only welding channel to show actual weld testing procedures and their results. THANK YOU !

[Quadflash]

Never thought about dye-based NDT for welds. I learned a lot. Thanks!

[Freshwaterfishkeeper]

Titanium grain structure is really cool if you can see it up really close. 👍🏼

[austingtir]

Was wondering when someone in the know was going to start showing videos of xray and proper structural welding procedures with testing and proof your on the right track with pen dye. I did all this welding structural steel and rail bridge flanges and webs together 20 years ago. Nobody else on youtube is showing this type of detail to this work so anybody watching that hasnt done this before should pay attention.

[The_NASA_GUY]

Great video. I like to try using those NDT techniques when I do my welds.

A friendly suggestion: when using solvents wear gloves. Human skin is not impermeable.

[camacho]

please keep it up with these NDT videos, great work

[eloy]

Keep up the highly informed videos guys

[austingtir]

I will add though im surprised you didnt show the dye test on something like a piece of 20mm V preped welded on one side and arc gouge out the other side, v grind, dye pen and weld back up with xray. This was our procedure here in NZ for basic 4711 coded welding. Or stainless steel milk tanker dairy welding where its used on sanded joints to show defects/pinholes.

I also think the use of dye pen to show what I might call possible cold roll from incorrect settings/to big a weld is probably not the best you should use the magnetic dye test for this as mentioned by the tech at the end of the vid. Interesting.

[mightylaidlow]

Great and very informative video, Bob. Thanks.

[barry]

Good to see some of the procedures that keeps welders honest. Just a couple of comments, there is NO evaporation in the developing stage its capillary action of the developer NOT evaporation. Second comment is cleanup is CRITICAL, the solvent during clean up must not be fluid on the test piece and is to be applied as per your technician in this case by a moistened lint free cloth but it must be thorough with no visible red evident with particular attention to the weld toe. Slag and spatter to be removed where possible. In my view the HAZ has been covered a little difficult to see but looks wide enough to me. I'll give your tech 7/10 from an ASNT level 3 and huge experience over many years. He would have got 8 but that water pressure was to high to close. Do that on very thin stainless steel bellows and you would miss indications. Now he is down to 6/10 unless i'm mistaken isn't that fluoro test plate titanium? then your mag particle isn't going to tell you much! I can't help myself BUT x ray is NOT the ideal method for crack detection as cracks are in general planar and unless the orientation of the beam is by good fortune looking down the crack you most likely will not see it. Dye pen and mag particle for surface and near surface discontinuities, x ray for volume defects and planar defects with careful orientation

[YounisAlwahaibi-gq]

In case i found a crack, how to solve issue?

[macnudd]

Good video, do the next step mag flux.

[ballinboyz]

If I have a welder grind out what could potentially be an indication, would I need to reapply penetrant and allow it to dwell again or could I just respray it with developer?

[hijiledwag]

Magnetic particle can not be done on titanium as it is a non-ferrous metal. Would need to do UT if you wanted to further inspect that weld.

[WTFChuk]

Bob, did you just very obviously adjust your junk at the beginning of this vid? LOL!!!

[biggreenthings]

That red line on top of the titanium weld is there because of gravity and lack of cleaning. If you flipped it over and re did the test it would still show up on the top of the weld

[scottwa]

Is there a video explaining why the CertiFlat welding table is tacked up the way you have it?

[onetime]

How harmful are penetrant dyes if accidentally contact with skin ?

[rajendra]

AST M E 165 or other standards are there ? What about others