Whether we can weld SA 335 P11 and SA 335 P91

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arunkumar periasamy

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Jun 17, 2015, 9:59:47 AM6/17/15
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In my condensing system my header line is having 2 materials

The line above sprayer which was connecting with condenser is SA 335 P11

And after sprayer till loop is SA 335 P91

 

Now my problem is whether we can weld or connect this SA 335 P11 and SA 335 P91 ?

S.Mohammed

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Jun 17, 2015, 11:32:27 PM6/17/15
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whats thickness and joints type involve?

arunkumar periasamy

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Jun 18, 2015, 2:37:34 AM6/18/15
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it is
OD 60.3mm and Thickness= 11.07mm
pressure = 6 bars
temp= 585 c
it is an butt weld

it is not an condensing system it is an MAV system ( Lubricant supply system )

james gerald

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Jun 18, 2015, 3:34:32 AM6/18/15
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YES you can weld SA335 P11 to SA 335 P91  with care.

As the PWHT temperature of P91 say 760 degC may exceed the lower transformation temperature of P11, a transition piece is recommended. Else butter the P91 portion using E9018 B3, perform the PWHT at 760 for 1 Hour then weld the buttered portion to P11 using E8018 B2 and perform PWHT at 690degC.



 
Thanks & Regards
J.Gerald Jayakumar
0091-9344954677

From: arunkumar periasamy <arun...@gmail.com>
To: material...@googlegroups.com
Sent: Thursday, June 18, 2015 9:36 AM
Subject: [MW:23087] Re: Whether we can weld SA 335 P11 and SA 335 P91

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arunkumar periasamy

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Jun 18, 2015, 5:02:46 AM6/18/15
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here given electrode rod is used for
P11-P22  E8018 B2 and
P91-P22 E9018 B3
so my transition piece material should be SA335 P22

if yes  Can we use min 1d length for our transition piece SA335 P22
if No what would be the transition piece material

we are not having any option to have direct weld in between these P11 and P91 due to Cr% (melting point will be vary) in chemical composition

On Wednesday, June 17, 2015 at 7:29:47 PM UTC+5:30, arunkumar periasamy wrote:

Ranendra Chakraborty

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Jun 18, 2015, 5:02:51 AM6/18/15
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You can directly weld P11 to P91 with ER80S-B2 and  E9016-B3. Maintain a preheat at 205 C and perform PWHT at 710C to 720C.
 
Regards,
Ranendra Chakraborty

pgoswami

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Jun 18, 2015, 7:30:14 AM6/18/15
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Hi Arunkumar,
 
You may follow this  discussion and  the provided solutions to your solve your problem. The table below provides overall electrode selection matrix for DMWs involving Grade-91 and other alloys.
 
Thanks.
 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineer/Specialist
Ontario, Canada
 
 

 

Ranendra Chakraborty

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Jun 18, 2015, 9:17:47 AM6/18/15
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Dear Pradip Sir,
Can you share your experience which one is better buttering or direct welding for metallurgical and strengthening point of view?
 
Regards,
Ranendra Chakraborty

Kannayeram Gnanapandithan

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Jun 19, 2015, 11:06:12 AM6/19/15
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if thick is less than 13mm, direct welding with pup piece,otherwise buttering, but pwht is issue if u weld P11+P91 directly because AC1 temp for P11 is around 745 deg celsius which is very to PWHT temp of P91

THANKS & BEST REGARDS,
KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CANGGvaJ0JZ-T2JkfHgz84iZZUCh4bHAx8L9PP2BJoKP1hhaVJQ%40mail.gmail.com.

pgoswami

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Jun 20, 2015, 11:23:08 PM6/20/15
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Hi Arun & Ranedra,
 
Please see the suggested recommendations in the attachment.
 
Thanks.
 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineer/Specialist
Ontario, Canada
 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Ranendra Chakraborty
Sent: Thursday, June 18, 2015 8:34 AM
To: material...@googlegroups.com
Cc: arun...@gmail.com
Subject: Re: [MW:23092] Re: Whether we can weld SA 335 P11 and SA 335 P91

Dear Pradip Sir,
Can you share your experience which one is better buttering or direct welding for metallurgical and strengthening point of view?
 
Regards,
Ranendra Chakraborty
On Thu, Jun 18, 2015 at 4:59 PM, pgoswami <pgos...@quickclic.net> wrote:
Hi Arunkumar,
 
You may follow this  discussion and  the provided solutions to your solve your problem. The table below provides overall electrode selection matrix for DMWs involving Grade-91 and other alloys.
 
Thanks.
 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineer/Specialist
Ontario, Canada
 
 
 

 
Grade11-Grade91 Steel welding- intermediate Pup Piece Gr 22.pdf

Vishwas Keskar Welding Manager Pune India

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Jul 16, 2015, 2:29:27 AM7/16/15
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pl add a Gr22 piece in between . Welding between Gr 22 to Gr 91 shall be carried out  with Typ - B3 consumable with PWHT at 750-760 Deg C .


On Wednesday, June 17, 2015 at 7:29:47 PM UTC+5:30, arunkumar periasamy wrote:
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