Norsok M-601

[asghar...@gmail.com]

Dear All.

Would you say what is the reason of this statement" When welding clad materials from both sides, the C and CMn steel shall be completely welded prior to welding the cladding. C or CMn steel or low alloyed steel weld metal shall not be deposited onto a high alloy base material or weld metal.'' ?

How is it possible for cladded piping?

Regards,

[George Dilintas]

 If you deposit a cladding of 316 or 304 on a carbon steel, you may get hot cracking due to low Ferrite number. Therefore you deposit a layer of 309 which mixed with the carbon steel does not give hot cracking

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[pgos...@rogers.com]

Hi Ali,

 

The statement in Norsok M-601 is self-explanatory. For double sided welding following the sequencing guidelines  specified in the document. While  performing single sided welding of clad pipes, the entire girth welding is typically done  with alloyed  filler metals/ electrodes. Sequences are  different than  welding a double sided welds.

The attachment explains how the single & double sided welds are performed in cladded pipe.

 

Thanks.

 

P.Goswami.P.Eng, IWE.

Independent  & Consulting Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgos...@rogers.com,pradip....@gmail.com

Cell/Whasapp:1-905-9793232

 

From: Ali Asghari <asghar...@gmail.com>
Sent: November 21, 2020 11:19 PM
To: material...@googlegroups.com
Subject: Re: [MW:31749] Norsok M-601

 

Dear George.

Thank you for responding, but my question isn't related to your response, actually this statement siad when you have two clad components which want to be welded to each other, first base metal shall be welded and joined ,after that cladded parts.

Now what would be possible for welding of cladded small piping?

Regards,   

 

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[Ali Asghari]

Dear George.

Thank you for responding, but my question isn't related to your response, actually this statement siad when you have two clad components which want to be welded to each other, first base metal shall be welded and joined ,after that cladded parts.

Now what would be possible for welding of cladded small piping?

Regards,   

On Thu, Nov 19, 2020 at 3:02 PM George Dilintas <dili...@gmail.com> wrote:

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[Sandeep Pr]

Dear Ali,

Please refer the following link. I hope that can guide you.

https://www.totalmateria.com/page.aspx?ID=CheckArticle&site=kts&NM=178#:~:text=Clad%20or%20composites%20can%20be,of%20producing%20a%20composite%20material.

With Regards,

Sandeep.P.Raghavan

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[Ali Asghari]

Dear Sandeep.

Thank you for sharing the link, but the only paragraph which talk about my concern is ''If the composite is a pipe or if it must be welded from one side, the buttering technique should be used. In this case the filler metal must provide an analysis equal to the clad metal and be compatible with the backing steel. Weld passes are made on the edge of the composite to butter the clad and backing metal. The buttering pass must be smoothed to the design dimensions prior to fitup. The same electrode can be used to make the join'' and again you have to deposit carbon steel filler metal on a buttering pass which is an alloyed metal.

I think the statement is not applicable for cladad piping.

Regards.

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[George Dilintas]

root pass with cladding filler metal 

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--

Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

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