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Up Topic Welding Industry / Inspection & Qualification / UT Wall Thickness Recommendations?
- - By jxsnyder Date 03-21-2023 15:27
I am in the market for a UT instrument to measure wall thickness of in-service carbon steel fire sprinkler piping. Measurements would be taken external and would be used to track degradation/corrosion. What manufacturers would you recommend for ease of use?
Parent - By jwright650 (*****) Date 03-22-2023 14:00
I like Krautkramer products, just because that is what I "grew up" with and I'm used to.
Parent - - By Jovi Zhu (**) Date 03-23-2023 01:17
UTT meters of various brands can be selected. Like John, I like Krautkramer too and still remember their MIC10/20 UCI Hardness tester I used a decade ago:wink:

But for the application one thing to consider is the accuacy of the meter to track the wall loss since degradation/corrosion happens slowly. For example if pipe wall loss is 0.001mm after the last measurement, and the meter can only indicate 0.00mm then there is lack of detection capability. Engineering's specification of min wall thk should be considered for the meter selection. There is so called "Rule of 10" in MSA.
Parent - - By 803056 (*****) Date 03-23-2023 12:41 Edited 03-23-2023 12:47
There ain't no Krautkrmer anymore. Remember, GE bought them out and I believe they were subsequently sold to someone else. It looks like Waygate Technologies is the current manufacturer of the USM Go and other Krautkramer instruments.

I could be wrong. It wouldn't be the first time.

Al
Parent - - By jwright650 (*****) Date 03-29-2023 18:27
Looks like you are right, Al. The last machine that I purchased (and still use almost daily) still has the Krautkramer name on it, but was being sold by GE Technologies is the USM36. At my previous employer, I had a USN 50 and a USN 58L with the video outputs where I could display the screen to an overhead projector for a classroom setting. I miss that 58L, it was a really nice piece, but this USM36 is better suited for climbing around on steel checking moments.
Parent - - By 803056 (*****) Date 03-29-2023 19:42
I've been using the USM Go for several years. It small, it's light, you can see the display in relatively bright daylight, and it packs a punch.

Al
Parent - - By 803056 (*****) Date 04-03-2023 23:26
I'm just wrapping up a job testing a subbase for a forging press. The monster weighs in at 140-tons. I'm mapping out several cracks with my USM Go. At the moment, I'm shooting with a sound path of 103 inches to the crack.

Al
Parent - - By jwright650 (*****) Date 04-04-2023 10:54
Al, is that straight beam or shear wave? 103" is quite a distance, so that must be a good sized crack you're finding.
Parent - - By 803056 (*****) Date 05-03-2023 01:45
Straight beam, yup.

The crack is 29-inches deep by 90-inches long. My job what to determine how deep the crack extended.

Al
Parent - - By jwright650 (*****) Date 05-08-2023 11:41
So how do you go about repairing that?  ....or will that be a replace vs repair?
Parent - By 803056 (*****) Date 05-08-2023 18:30
I suggested an approach for a temporary repair that must last until the new component can be made. It's going through finite element analysis at the moment.

The lead time for a new part is about a year.

Al
Up Topic Welding Industry / Inspection & Qualification / UT Wall Thickness Recommendations?

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