if material to be welded have carbon content more then 0.3% or its
thickness is more then 25 mm it should be preheated 79 degree C in any
other case min temp for welding is 10 deg C i.e no need of pre
heating.REf ASME Sec VIII Div 1 (2010) Non mandatory appendix R. You
can see table UCS-56 of same sec for PWHT.
email me if further help needed.
Take care
ME
On Jan 16, 2:52 pm, jesti fer <jesti_...@yahoo.com> wrote:
> Dear Experts,
>
> I need your help for this subject, We are fabricating some piping as per B31.3, the material ASTM A106 Gr.B, 8"Sch-XXS and 160 and we are doing preheat and PWHT for welding, but my enquiry pre heat is required for cutting also? It is mentioned in any code or any other were? Please help me
>
> Jesti
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