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Author Anyone do MPI (Magnetic Particle Inspection?)
Dan
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Registered: 22nd Apr 02
Location: Gorleston on Sea, Norfolk
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2nd May 13 at 18:20   View Garage View User's Profile U2U Member Reply With Quote
So what else can be tested with the mpi?

My supervisor is adamant its the best method for our engine work, ive forwarded him and the department manager the pricing etc.

They seem keen to do it, just unsure what else it will open doors too.



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Dan
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Registered: 22nd Apr 02
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2nd May 13 at 18:21   View Garage View User's Profile U2U Member Reply With Quote
We do a lot of unit building, all from scratch, so theres a lot of welding involved and we usually send the frames that are lifted off for testing. Im assuming this would do that?

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fred7
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Registered: 17th May 04
Location: Rugeley, Staffordshire
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2nd May 13 at 19:18   View User's Profile U2U Member Reply With Quote
It really depends on what you weld dan and what you need to test. Thats y theres a few different processes to deal with different things. I may b wrong but if you have ut already think they would be covered to do mpi already?
alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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2nd May 13 at 19:27   View User's Profile U2U Member Reply With Quote
It's more large scale stuff it's used for it my work, I've never seen one that you might use for say a 1/2'' pipe weld - that sort of stuff's usually tested with dye pen.
Colin
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2nd May 13 at 19:38   View User's Profile U2U Member Reply With Quote
We do it along with UT and radiography at my place.
Dan
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Registered: 22nd Apr 02
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2nd May 13 at 19:49   View Garage View User's Profile U2U Member Reply With Quote
what do u use it for colin?

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alan-g-w
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2nd May 13 at 19:52   View User's Profile U2U Member Reply With Quote
They used to do X-ray before my time, the room's still there for it. It's a mob called Axiom that get subcontracted most of our testing but the welders do some as well, the guys always talk about how loaded they are.
richc
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Registered: 24th Mar 07
Location: Ilkeston
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3rd May 13 at 07:23   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Dan
So what else can be tested with the mpi?

My supervisor is adamant its the best method for our engine work, ive forwarded him and the department manager the pricing etc.

They seem keen to do it, just unsure what else it will open doors too.



Our MD is in racing cars. Im talking like £50k engine builds and stuff, and we Dye pen everything to do with his cars.
Dan
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Registered: 22nd Apr 02
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3rd May 13 at 12:11   View Garage View User's Profile U2U Member Reply With Quote
I'm talking big big engines though. 1000 plus bhp long running stuff. So it's big capacity but only small output.

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richc
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3rd May 13 at 14:05   View User's Profile U2U Member Reply With Quote
Obviously up to you, but MPI is abit 'run of the mill' in NDT terms.

For example, all our Rolls Royce work (nuclear, submarine etc) are Dye pen. You can do Dye pen on a range of materials, something which you cant do with Mag hence suggestin Dye pen.
fred7
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Registered: 17th May 04
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3rd May 13 at 15:03   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by richc
Obviously up to you, but MPI is abit 'run of the mill' in NDT terms.

For example, all our Rolls Royce work (nuclear, submarine etc) are Dye pen. You can do Dye pen on a range of materials, something which you cant do with Mag hence suggestin Dye pen.


This is correct our rolls royce stuff has to be dye pen but its all aluminium but still best process for what we do
Dan
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Registered: 22nd Apr 02
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3rd May 13 at 18:15   View Garage View User's Profile U2U Member Reply With Quote
When you say dye pen, is that the spray it red, then spray it white stuff? We do that now, but he reckons its pretty crap. Maybe its the cheap products we use?

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fred7
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3rd May 13 at 19:03   View User's Profile U2U Member Reply With Quote
Yes thats dye pen. It depends how your using it? Defo not crap
Dan
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Registered: 22nd Apr 02
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3rd May 13 at 19:05   View Garage View User's Profile U2U Member Reply With Quote
Itll show surface cracks only though wont it?

I think hes wanting the below surface issues?

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fred7
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Registered: 17th May 04
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3rd May 13 at 19:34   View User's Profile U2U Member Reply With Quote
Mpi wont show below surface cracks really. Thats what UT is for

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