UT/RT

[Sundar Kumar]

Dear Experts,

  Is there any code reference that we should do  UT/RT only after 24/48 hours of welding . We are following construction code 31.3. Material carbon steel .

Thanks&Regards,

Sundar 

[syed moinul hasan]

There is no such code or standard, which compel you to perform  after 24/48 hours of welding.

However, it is recommeded to perform it  early inorder,  to know the soundness &  quality of the weld as well as performance of welder .

Thanks

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[Saulo MU]

You must eliminate the possibility of HIC in joints ( cracks could appear after cooling of Heat treatment has been completed that is the need of waiting 48 h )Specialy in hight tickness (up 20mm)


For Contractors is mandatory Visual inspection in all Codes

[Rajnish Dixit]

Dear Mr. Sundar,

It is a good engineering practice to perform non-destructive tests after 24/48 hours of welding to ensure there was no delayed cracks/ hydrogen induced cracks developed in welded joints.

It is generally applicable for low alloy steels like ( P5, P9, P11, P22, P91 materials) and ferritic steels.

This information is mainly specified in the welding related specifications of clients.

Thanks,
Best Regards,
Rajnish


--------------------------------------------
On Wed, 9/14/16, Sundar Kumar <sunkum...@gmail.com> wrote:

Subject: [MW:25392] UT/RT
To: "Materials & Welding" <material...@googlegroups.com>
Date: Wednesday, September 14, 2016, 9:56 PM

Dear Experts,
  Is there any code reference that we should do
 UT/RT only after 24/48 hours of welding . We are following
construction code 31.3. Material carbon steel .
Thanks&Regards,Sundar 



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Users must take their own decisions w.r.t. applicable
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[Mhaskar Aly]

It is good for Manufacturer to carry out RT / UT after certain duration of welding  (depends on type of material) to catch up delayed crackings (if any), as finally Manufacturer is certifying that product & is responsible for it.

Aly

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[Saulo MU]

As mhs indicates ,the need of inmediate inspección vía UT/RT is to control the welder performance.
So stop welders with a % of defects found .Lets say 5% ( percentage agreed).Also in case of failure you must duplicate quantity of tests.Till this reduces or to give permanent vacations (on the contrary) to this welder.

[kingslygeo vargheese]

Dear Sundar,

For offshore structural members as per EEMUA 158

7.2.2    Timing of Final Inspection and NDT

All visual inspection of completed welds shall be carried out as soon as is practical after the item has cooled down to ambient temperature .

NDT shall not be carried out until at least 48 hours have elapsed following completion of welding. However, for welds/items which are subject to a PWHT requirement , the specified inspection and NDT may be performed and reported immediately following completion of the PWHT process. but not before the welds/items have cooled to ambient temperature.

Regards

Kingsly Geo

BUREAU VERITAS - Abu Dhabi

On 1 October 2016 at 10:48, Saulo MU <pablo.cartag...@gmail.com> wrote:

As mhs indicates ,the need of inmediate inspección vía UT/RT is to control the welder performance.
So stop welders with a % of defects found .Lets say 5% ( percentage agreed).Also in case of failure you must duplicate quantity of tests.Till this reduces or to give permanent vacations (on the contrary) to this welder.

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