RE: [MW:12123] Repair procedure on severely punctured root

Ramin.

 

Why PWHT? Does a weld thickness of 12.7 mm on  SA 106 Gr B base metal require any PWHT as per any commonly referred boiler and pressure vessel code?

 

I would think the suggestion of Prem Nautiyal is the way to go.

 

The technique referred is" common bridging technique" to close in wide-root gaps, which is quite common for manual GTAW. Using 6010 with 10-12 mm root gap would not be safe , as the welder would not be able to control the weld puddle.Hence GTAW would be the preferred technique to bridge the root and proceed further.

 

Thanks.

 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario,Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ramin Kondori
Sent: Friday, August 05, 2011 11:10 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:12121] Repair procedure on severely punctured root

It's better to apply PWHT after completion of the weld.

Regards

Ramin  Kondori

   QC/Welding Engineer 

         IWE AT 0070

   

On Fri, Aug 5, 2011 at 12:50 PM, prem nautiyal <prem_nautiyal26@yahoo.com> wrote:

Yes you can do weld buildup on the punctured rootface by ER70S-2 (TIG) till you get a uniform root gap of @3mm. Then weld the root run with ER70S-2 and complete the joint with E7018 provided you have a WPS / PQR for the same.   Regards   Prem Nautiyal --- On Fri, 8/5/11, limesh M <limesh78@gmail.com> wrote: From: limesh M <limesh78@gmail.com> Subject: [MW:12110] Repair procedure on severely punctured root To: "Materials & Welding" <materials-welding@googlegroups.com> Date: Friday, August 5, 2011, 10:45 AM Dear All, Material : ASTM A106 Gr. B Thickness : 12.70 mm Welding Process : SMAW Electrodes used as per approved WPS : SFA 5.1, E6010 (Root)+ SFA 5.1, E7018(Fill&Cap) During through thickness repair, by mistake root pass has been punctured badly(5-8cm in length after complete removal).Unfortunately,now the root gap is almost 10-12 mm wide and it is difficult to weld root again with E6010.In this case what is the better option other than cut and bevel the joint.Is there any problem to build root with GTAW by using ER 70S2 and fill remaining thickness with 7018? Regards, Limesh -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.