Wednesday, March 9, 2011

Re: [MW:10231] Looking for WPS for A182 F22 to HP Nb Mod ( 35% Ni , 25%Cr Material)

additionally u may put this query to forum;

a)http://www.hghouston.com/dcforum/DCForumID6/220.html
b)kolmetz.com

please share the hands on experience of welding these joints.


regards


On 3/9/11, Yogesh kumar <yogeshandpini@gmail.com> wrote:
> i dont have experience of such a dissimilar joint .
>
>
> Is it a service exposed tubes,??
>
> Which portion u are having this sort of joint in the furnace ,normally
> oulets are HP40 Nb modified tubes.??
>
> this is dissimilar metal welding case,between fully austenitic to
> ferritic base metal.
>
> what i presume ,
> pre-heating to 300degC,and welding with inconel filler should meet the
> requirement as PWHT may result in PWHT cracking so it should be
> followed as per ASME Section VIII, part UNF - 56.
>
> regards
>
> yogeshK
>
>
>
> On 3/8/11, ak1965 <akashverma1965@gmail.com> wrote:
>> We need to butt weld many joints in the outlet of ethylene furnace
>> with following material specs:-
>>
>>
>> Base Metals :- HP Nb Mod. (35% Ni & 25% Cr) & A 335 F22 ( 2.25% Cr &
>> 1 Mo)
>>
>> Pipe Thicknesees : 11 mm ( both pipes)
>>
>> Service Temperature : 900 Deg C
>>
>>
>> Please help to prepare WPS for this typical joint and also what NDT is
>> required to esptablish the integrity.
>>
>>
>> Regards
>>
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>>
>

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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