Yuo can use any mode of current AC or HWDC for WEP inspection. MT shall be done for tight laminations open to surface only.
Best u do Ut for subsurface laminations.
UT will give much better results than MT.
UT shall be done before WEP.
On Sep 19, 2012 3:07 PM, "Biplab Pal" <biplab.mech@googlemail.com> wrote:
-- --The fitting is gas cut and then grinded for modification work of pipeline.
On Tue, Sep 18, 2012 at 2:17 PM, muthu barathi <muthu_barathi@rediffmail.com> wrote:
You have to mention some more details for correct advice.
1. whether the bevel was made by gas cut or machining?
If gas cut used w, while gas cutting it might be opened if lamination was present.
AC will detect only surface not sub surface.
If you want to see sub surface defects then you have to go for HWDC. That also you can go up
to 3mm effectively.
On Mon, 17 Sep 2012 21:36:56 +0530 wrote
>Dear Exparts,
I have a doubt regarding MPT method.
I am going to check the lamination of plates from the bevel edges.
What MPT current mode should we use.
Is it AC or HWDC?
Please share your knowledge and code references.
--
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Biplab Pal
Welding Inspector
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