[MW:536] Re: 533] Filler metal for P 11 (O/L SS 347) to P8

In the above query the thickness of weld neck & nozzle has not been mentioned and assume that the connection is between the nozzle pipe & weld neck flange.If there is no PWHT as per design requirements then root  as well as final pass welding can be carried out using ER347 +E347 due to homogeneuous layer present. Welding final layer with Inconel will not give have any positive impact rather the chance pf cracking is not ruled out due to differential thermal expansion of P11+SS347+Inconel.Either full welding with 347 or Inconel will be a better option.

 

with regards,

gopalsanakr

DM(ES-Inspn)

CPCL

Chennai

"Bathula Raghuram (Mumbai - PIPING)" <R.Bathula@ticb.com> wrote:

Is this vessel subjected to PWHT?

I assume it should be, also assuming it is a stub in type connection, then use ER347 + E347  for joining weld overlay portion to LWN (i.e inside weld of nozzle), and may use Inconel consumables ERNiCr3+ENiCrFe-2/3 for weld on ouside (i.e fillet joining P11 to F321 neck)

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Desai Jignesh
Sent: Tuesday, January 29, 2008 2:46 PM
To: materials-welding@googlegroups.com
Subject: [MW:533] Filler metal for P 11 (O/L SS 347) to P8

 

Dear Member,

 

Can some body give his/her opinion for filler metal of following condition?

 

Branch connection (Tube Side) between LWN flange (Material SA 182 F321) to SR Nozzle (SA 182 F11 CL 2 + Weld Deposit 347 SS).

 

Service is Hydrogen.

 

Operating Wall Temperature - Tube Side is IN 372 C & Out 225 C.

 

Also recommend the filler metal for the first layer of weld deposite.

 

Thanks in advance

 

Jignesh

 

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