Re: [MW:11292] Fw: about A335 Gr P11

Mr. Ilangkumaran,

 

Probably, you need to consult your Welding Engineer for this as the answer to this question is not straight forward and it depends on many factors suchas the Code of Construction, the service fluid and conditions, etc.

 

Your choice is more or less correct and the choice may vary a bit depending on the position of welding.

 

A335 Gr. P11 is of course, an alloy steel (Cr-Mo steel. This steel may be used in moderately high temperature, may be upto 300 to 400-deg. C. Above 450 deg. C it may not be economical to use and the code also imparts some restriction (For e.g. refer ASME B31.3 (This moment, I do not have the code handy to give reference)

 

PWHT requirement will also vary based on the code/client requirements. Normally, ASME codes call for PWHT reuirement above nominal thickness of 13 mm (1/2 inch). So, it is better you refer this matter to your WE or Technology department for the exact requirement.

 

I hope the above points may be useful to you.

 

With best regards,

 

Prasad Joshi

Linde

 

 

On Sat, May 28, 2011 at 9:36 AM, k.ilangkumaran ilangkumaran <k.ilangkumaran@yahoo.com> wrote:

Dear experts,         How do you call this below given material and how to select electrodes should we take operating temperature into account or only like tensile strength of the material and its chemaical composition? Is this carbon steel or low alloy steel since the chemical compositions is 1 1/4Cr-1/2Mo it is lessthan 7% of its total composition or should we call it as cromolly? I had selected this electrode E8016B2 is this ok? I have given preheating 125 deg centigrade and PWHT too. How do we find out the soaking time and rate of raising temp?   A335 Gr P11    Can anybody reply me please and I will be so pleased.   Regards Ilangkumaran

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