RT/UT OF SOCKET WELD/BRANCH WELD

[Jignesh Desai]

Few days ago i came across UOP specification 8-11-12-Piping, which asked radiography of socket / branch welds for low alloy steel/SS. If somebody has done project with UOP in past, pl share their experience.

Also i read one very old B 31.3 Interpretation: 5-13 for the radiography of socket welds as below...

Subject:ANSI/ASME 831.3-1984 Edition, With the ANSI/ASME 831.3a-1984 Addenda, Table 327.4.1A, Limitations on Imperfections in Welds-Internal Porosity 

Date Issued: December 2, 1986

Question (1): In ANSI/ASME 831.3, Table 327.4.1 A, under internal porosity forfillet, socket, seal and reinforcement attachment welds, the wording NA (not applicable) is indicated. Does this mean that radiographic examination is not required for this type of joint configuration?

Reply (1): Yes.

In my opinion, RT of SW is only performed to detect the gap between two components, also in past during some corossion isometric study, we have assigned TML (thikness monitoring location) to carry out RT of SW/BW to confirm the correctness of welded heavy schedule components.

Can any one write few words about the technical feasibility and effectiveness of final result to confirm the soundness of SW/Branch weld by RT/UT with code back up? If somebody have any digital RT film of SW joint pl share.

Best Regds

[paresh k patel]

Dear Jignesh

Hi! How are you? Hope fine.

Yes this is carried out to detect gap. In many companies this practice is adopted to verify gap for SW joints.

Regards

Paresh Patel
ABS IV


On Wed, 01 Dec 2010 07:17:32 +0530 wrote

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[Raghuram Bathula]

Yes it is common to check 5% or 10% of welds, but 100% RT as specified
in this stnadard is something strange.

On Dec 1, 11:47 am, "paresh k patel" <pkpatel1...@rediffmail.com>
wrote:

[Ahmed Husain]

It is also ARAMCO requirement  to take NDT to verify gaps in SW joints.

 

Regards,

AHusain
 

---

From: Raghuram Bathula <raghura...@gmail.com>
To: Materials & Welding <material...@googlegroups.com>
Sent: Wed, December 1, 2010 10:31:11 AM
Subject: [MW:8461] Re: RT/UT OF SOCKET WELD/BRANCH WELD

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[marcelo]

dear all,

for my understanding of rt with socket welds especially in high temp
service is to ensure that the gap is there so the material is allowed
in termal expansions to avoid pushing the fillet weld during in
service condition.

thanks,
marcelo p soriano
qa/qc engineer

On Nov 30, 7:52 pm, Jignesh Desai <jignesh.desai....@gmail.com> wrote:
> Few days ago i came across *UOP specification 8-11-12-Piping*, which asked

> radiography of socket / branch welds for low alloy steel/SS. If somebody has
> done project with UOP in past, pl share their experience.
>

> *Also i read one very old B 31.3 Interpretation: 5-13 for the radiography of
> socket welds as below...*
> *
> *
> *Subject:ANSI/ASME 831.3-1984 Edition, With the ANSI/ASME 831.3a-1984

> Addenda, Table 327.4.1A, Limitations on Imperfections in Welds-Internal

> Porosity *
> *Date Issued: December 2, 1986*
> *
> *
> *Question (1): In ANSI/ASME 831.3, Table 327.4.1 A, under internal porosity

> forfillet, socket, seal and reinforcement attachment welds, the wording NA
> (not applicable) is indicated. Does this mean that radiographic examination

> is not required for this type of joint configuration?*
> *
> *
> *Reply (1): Yes.*