RE: [MW:24297] P-91 to SS Welding

Hello Expert,

 

How ever a WPS to be qualified to implement the process.

 

Bala Nechur,

Corporate QA/QC Manager

Phoenix Industrial

Email: bala.nechur@phoenixindustrial.ca

www.phoenixindustrial.ca

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From: materials-welding@googlegroups.com [materials-welding@googlegroups.com] on behalf of George Dilintas [dilintas@gmail.com]
Sent: February 15, 2016 3:46 AM
To: Meghanadh K
Subject: Re: [MW:24294] P-91 to SS Welding

Correct, the issue is to avoid heating SS (risk of sensitization)

2016-02-11 11:08 GMT+02:00 pradip kumar Sil <pradipsil@gmail.com>:

Dear Sir,

Thanks in advance.

As per my understanding :

 We will do buttering the P-91 pipe around 5 mm with PRE HEAT + POST HEAT +PWHT by  filler wire ERNiCr-3. Afterwards fit-up will be done with SS pipe & continue welding without preheating +postheating +pwht.

Correct me if i am wrong.

Regards,

On Mon, Feb 8, 2016 at 6:11 PM, <dilintas@gmail.com> wrote:

If your Code is ASME you need to PWHT whatever the thickness is. So the best practice is to do buttering and then PWHT. Once PWHT completed you weld to 316. 

The thickness of the buttering should be such that the haz of the second weld does not fall on P91. I would suggest 5 mm

Sent from my BlackBerry 10 smartphone.

From: pradip kumar Sil Sent: Δευτέρα, 8 Φεβρουαρίου 2016 - 14:56 To: materials-welding Reply To: materials-welding@googlegroups.com Subject: [MW:24251] P-91 to SS Welding

Dear Expert,

We have to weld P-91 Material to 316 (SS) material with ERNiCr-3 filler Wire Socket Weld.

My question is needs to do buttering  the P-91 material if required how much layer we Need ?

During  & After buttering needs to conduct preheating & Post heating ?

During & after welding socket weld  only P-91 side or both side  we will conduct preheating +post heating + PWHT

Thanks in advance.

Regards

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Georgios Dilintas

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Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis

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