Eddy Current Test Acceptance 1

• Apr 3, 2007

1
• #2

EdStainless

Materials

May 20, 2004

16,283

The criteria are either in A249 or A1016 (the general spec). A rejection level is set using a standard with a drilled hole not to exceed 0.031" in diameter.
The E specs are just methods.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

Upvote 0 Downvote

• Apr 3, 2007

• Thread starter
• #3

SnTMan

Mechanical

Jan 22, 2005

6,824

Ed, thanks, I'll review and decide on one or the other. Maybe I should look at the tube quote too

Regards and thanks again,

Mike

 

Upvote 0 Downvote

• Apr 4, 2007

• #4

TubeSled

Materials

Aug 31, 2006

5

Mike,
Also E309 is commonly used as an eddy test method, with either of the following defects as the referenced standard:
1-A transverse notch up to 12.5% of wall
2-A drilled hole (up to 3 holes)
3-A longitudinal notch up to 12.5% of wall.

-Tom

 

Upvote 0 Downvote

• Apr 4, 2007

• #5

EdStainless

Materials

May 20, 2004

16,283

I have always preferred using a single drilled hole and require that it be run in four positions to verify calibration.
I also use holes rather than notches because it is easy to verify the size of the holes (I own some small pin gages). Notches have to EDM machined and the replicated to get measurements.

You don't need to specify an ET E spec. If you look at A249 it calls out A1016. And A1016 lists E309 and E426 as test methods.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

Upvote 0 Downvote

• Jul 9, 2007

• #6

sammyty

Industrial

Jun 28, 2007

7

EdStainless, excellent information here. i too am doing some eddy current testing, (rookie)
i am getting some conflicting information, spec e 309 says what it says about notches in the tubing and holes. i have been told by the eddy current maching manufacturer that if i have a second channel (absolute) on the machine i will have to mill a notch thru the tubing, e 309 says the notch is to be a percentage of the wall thickness...?? so which one is it?
Thank you, yes a269,a270 tubing

 

Upvote 0 Downvote

• Jul 11, 2007

• #7

EdStainless

Materials

May 20, 2004

16,283

E309 is very general.
If you are going to run bot differential and absolute, you need to decide what you are looking for with the absolute channel. The tubing spec will tell you what to use for ref std in the diff test.
There are a number of ways to use the absolute channel, though I have always like using two differential channels at different frequencies in order to get a better picture of the indication types.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

Upvote 0 Downvote

• Jul 11, 2007

• #8

sammyty

Industrial

Jun 28, 2007

7

EdStainless
thanks again. per spec e309, the testing should be for wall thickness only. (correct me if i am wrong) so with the absolute test i would be looking for thin wall conditions.
so can i look for this condition with a thru notch or do i need a milled notch not all the way thru the tubing..??

 

Upvote 0 Downvote

• Jul 11, 2007

• Thread starter
• #9

SnTMan

Mechanical

Jan 22, 2005

6,824

Just to close my part of this I did look at the tube quote, of course there is nothing there, and re-read SA-249 which invokes SA-1016, which pretty much settles the issue. Thanks Ed and others.

Mike

 

Upvote 0 Downvote

• Jul 11, 2007

• #10

rmw

Mechanical

Feb 6, 2002

5,724

SnTMan,

You must be hard up for some good reading; that's all I have to add.

rmw

 

Upvote 0 Downvote

• Jul 11, 2007

• Thread starter
• #11

SnTMan

Mechanical

Jan 22, 2005

6,824

rmw, that's what I get paid to do

 

Upvote 0 Downvote

• Jul 12, 2007

• #12

rmw

Mechanical

Feb 6, 2002

5,724

I know you do; I hope you could see the tongue in my cheek. I've read SA-249 myself and don't recommend it to the casual reader. But then too, I had a payday involved when I did it.

rmw

 

Upvote 0 Downvote

• Jul 13, 2007

• Thread starter
• #13

SnTMan

Mechanical

Jan 22, 2005

6,824

"I know you do; I hope you could see the tongue in my cheek."

Be assured I did. BTW, I didn't mean to imply I read the WHOLE THING at one sitting, just what I needed

 

Upvote 0 Downvote

• Jul 16, 2007

• #14

sammyty

Industrial

Jun 28, 2007

7

Edstainless
does your company do its own mechanical tests on the tubing?
if so did you get these tests or procedures certified by someone?
thanx again for all your help

 

Upvote 0 Downvote