What is NDT?

[gooner159]

Anyone have an idea what is NDT?

[Paul]

Non-destructive testing I think... Such as ultrasonic.

[ds.raikkonen]

Non-destructive testing I think... Such as ultrasonic.

Radiographic examination & Magnetic Particle testing are also methods of NDT.

[Giblet]

An old friend of mine was an Non Destructive Testing guy for the nuke plants in Ontario and some of the plants in the states. He used gear to run tests on cooling tubes.

It is also called Eddy Current Testing, which should help with your googling.

[ds.raikkonen]

Eddy current testing is used to detect surface defects right?

[Scotracer]

I'm probably the person to ask. I'm trying to get a presentation ready for Tuesday about Automated Ultrasonic Testing. God I hate presenting stuff

[noname]

UT widely used by energy for welds inspections.

[scarbs]

NDT as everyone agrees is “Non destructive testing”, its used to assess if a part is at the end of its life, without having to destroy it in the testing process. I’ve been to a few F1 NDT depts (Spyker and Honda as they were then known). NDT tends to be carried out on highly stressed components such as suspension and gearbox pieces.

For example

All suspension components (wishbones pushrods etc) are brought back for inspection and NDT after each race. Ultrasound is used to detect cracks and load tests are carried out with acoustic sensors to ‘listen’ for cracking of the fibres.

Metal parts such as hubs and uprights are crack tested with fluorescent fluid under UV light

[Belatti]

Some pages to check:

http://www.ndt-ed.org/index_flash.htm

http://www.magnaflux.com/

http://www.ndtsystems.com/index.html

[safeaschuck]

NDT as everyone agrees is “Non destructive testing”, its used to assess if a part is at the end of its life

Yep, but i would say it's used more during a parts rated life as a method of being as sure as you can be that nothing is happening to the part which will shorten it's lifespan.
When a part is at the end of it's rated hours it tends to get binned or stored for emergencies only, regardless of the out come of NDT.
However if it still has 10 hours left and you are between race weekends your going to strip every last nut and bolt and crack test everything just to be on the safe side.

[Richard]

NDT as everyone agrees is “Non destructive testing”, its used to assess if a part is at the end of its life

Yep, but i would say it's used more during a parts rated life as a method of being as sure as you can be that nothing is happening to the part which will shorten it's lifespan.

In my line of work it is also prior to the start of the design life, ie during manufacture to check joints and welds. It is also used to test castings and forgings for any flaws.

I guess it could be used for testing laminates/composites for de-lamination or de-bonding of the layers? That's just my guess.

[compo]

[Giblet]

Eddy current testing is used to detect surface defects right?

Wiki says:

"Eddy-current testing uses electromagnetic induction to detect flaws in conductive materials. There are several limitations, among them: only conductive materials can be tested, the surface of the material must be accessible, the finish of the material may cause bad readings, the depth of penetration into the material is limited, and flaws that lie parallel to the probe may be undetectable"

The use in the Candu reactors was more of an audit. They would test year to year, and look for changes and trends. The quality checks in Nuke plants are pretty insane, no tube with a flaw would ever make it anywhere near the plant.

My brother is an Electrician and works at a plant in Bruce. There is no stone unturned, untested, undocumented, or without procedure.

[Giblet]

Aren't you a tricky little spammer? Of course you have no idea, you are an acai berry expert.

Reported.

[Ciro Pabón]

... and banned. Thanks.

(NOTE: I erased the post before Giblet's)