Re: [MW:30363] how to verify the weld joint integrity without destructive test-reg

I think that welding can be acceptable, the concept is sanity (SANIDAD, I don't know which is the most appropriate word in the English language), without defects, but there is no guarantee that this welding will resist enough, sanity is not the same, which is determined by an NDT, the resistance of said welding and many do not know how to distinguish between these two concepts; In theory for that there is Visual Inspection (Before, During and After), but it is not just "seeing", you really need to verify a number of factors during these three stages, I will state some:
BEFORE: Base material, Filler metal, Calibrated Welding Machine, Drawings, preheating, joint preparation, WPS, etc.
DURING: Amperage, voltage, wire speed, position, preheating between steps, cleaning between steps, etc ...
AFTER: Appearance, surface defects, cooling rate, penetration, PWHT, etc ...
The truth is that many inspectors only see the last stage and do not bother to see the first two, but for more information, check the AWS Welding Inspector Manual, there he talks more extensively about this topic.
Regards!

El mié., 8 ene. 2020 a las 21:10, Vasanth P (<19vasanth@gmail.com>) escribió:

Hi pillai

As I know, you cannot check the weld integrity in job without destructive test.

Only you can find weld imperfections through nondestructive test.

For structural weld, if it is mild steel and not heavy thick. Most preheat will be no less than zero degree and inter pass should not exceeding 250degree C.

And no client will do integrity test after welding in structural steel jobs if it is MS steel. 

If it is high or low alloy steel you can do PMI method to check the alloy content.

Correct me if I am wrong.

On Wed, 8 Jan 2020 at 11:26 AM G.K.PILLAI <pillai762000@gmail.com> wrote:

dear experts,

 can we have to verify the structural weld joint integrity with any one of non destructive test methods.( exactly my question is here  during welding  the contractor  may not be following the preheat and intrepass temperature .but the weld was completed.in this situation how to verify the weld joint integrity without destructive test)

Thanks&Regards,

G.K.PILLAI.

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