What is the jointed materials Pnos?
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Original Message
From: Karunakaran Karan
Sent: Τρίτη, 22 Σεπτεμβρίου 2015 - 17:26
To: materials-welding@googlegroups.com
Reply To: materials-welding@googlegroups.com
Subject: Re: [MW:23504] Governing Thickness for PWHT(B31.1&31.3)
Dear Gents,
What is the minimum thickness for PWHT in revision 2014.
Pl.guide me.
Thank you
karunakaran
On 9/22/15, george.dilintas@gr.bureauveritas.com
<george.dilintas@gr.bureauveritas.com> wrote:
> For one more time I recommend to read all the relevant chapter of the Code
> and not isolated paragraphs.
> So I would like to draw your attention also to the following paragraphs
> 132.1.2
> 132.2 (B)
> and to 132.4.2
>
> best regards
>
> Dr. Georgios Dilintas
>
> Authorized Nuclear Inspector
> Authorized Inspector Supervisor
>
> I&F REGIONAL TECHNICAL MANAGER
> BUREAU VERITAS PIRAEUS - GREECE
>
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Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change. Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
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