Materials & Welding: Re: [MW:35634] Can we avoid PWHT for P No.5A to P No.1 , 10mm weld joint ?

Friday, June 6, 2025

Re: [MW:35634] Can we avoid PWHT for P No.5A to P No.1 , 10mm weld joint ?

Dear Sir,

Thank you for your explanation.

As the vessel design based on Sec VIII Div-1, and if our client insists to do PWHT for that joint,

Case 1) can we do a pqr by buttering with ERNiCr-3 on P No.5A plate and butt weld with same filler for this dissimilar joint to avoid pwht.

Because, for P no.1 , the holding temperature is about 600 deg C and for P No.5A, the holding temperature is about 675 degrees C as per Sec VIII Div1,.

Case 2) Or , when we do pwht for this joint using ER80S-B2 filler, can we use higher holding temperature of 675 degree C .

METALLURGICALLY, is it safe ?

Please confirm.

Thanks and Regards,

Saravanan Sornam,

S.KOREA

On Fri, 23 May 2025, 8:43 pm George Dilintas, <dilintas@gmail.com> wrote:

in case the nominal base metal thickness is less than 16 mm and the specified Cr% is less than 3 (you must check the base metal MTRs) and the max C% is 0,15 (check MTR) and you apply a min preheat of 150degC then you are allowed not to perform PWHT, as per Section I
Δρ. Γεώργιος Διλιντάς
Ηπείρου 5 , Μελίσσια - 15127
Αεροναυπηγος Μηχανικός - Μελος ΤΕΕ 55018
Τηλ +30 210 8100578, +30 6944 646 204

Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

Στις Παρ 23 Μαΐ 2025 στις 5:36 π.μ., ο/η PARAI Reaction Channel <saravanshyla@gmail.com> έγραψε:
Dear Sir,

It is a condensate receiver tank and it is a design requirement from client side.

Regards,
Saravanan.
S.KOREA

On Thu, 22 May 2025, 9:26 pm Raghuram Bathula, <raghurambathula@gmail.com> wrote:
Why do you use P22 nozzles on CS?

On Thu, 22 May 2025, 16:24 PARAI Reaction Channel, <saravanshyla@gmail.com> wrote:
Dear Sirs ,

We have a project with both shell and Reinforcement Pad materials SA516-70, 10 mm Thk ( P No.1 ) and the Nozzle is SA335-P22, 4" Sch 120 ,
11.1 mm ( P No.5A ) Thk.

We already have a qualified WPS & PQR with 8mm GTAW and tested about 10 years ago by other welding engineer, for P No,.5A to P No.1 without PWHT and it was satisfactorily passed and we
have used that WPS & PQR for the previous project 10 years ago and no
issues found without PWHT.

Now for the new project, we are going to use the same WPS and apply
Preheat ( 204 to 250 Deg C ) as per the WPS for 10mm Shell Thk by
multipass welding, refer to the below sketches.

So, i would like to confirm whether PWHT is mandatory as per UCS-56-4 ?
Can we avoid PWHT for this 10mm weld joint ?

Or Should we do buttering with ERNiCr-3 on P No.5A bevel and butt weld
with same filler for this dissimilar joint to avoid PWHT after making new
PQR with buttering?

Please confirm soon.

Thanks and Regards,
Saravanan Sornam,
ANSAN-Si,
S.Korea

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CALV1rk%2Biby3LDhuASFD6Sx3wD6mhOVKRXA8dsJCQcfO-yNsjhQ%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CADxVub%3DgSEPtoFpp%2BtcafrEOrNOzUxFt_9E4TfiPwfyP21JHdg%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CALV1rkJt_cnVR3wJkwRy%3DHUD9Qviu-HO7EmcYVbQQmmkV2v8iA%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAPOi40DG_DrGuXyUf71iiv7uhcJSQxtFTDnFfu%2B9TavjjOOrPg%40mail.gmail.com.