Minimun thickness requirement to carryout PWHT for CS

[Venkateswaran]

Dear All

As per ASME Sec 8,what will be the minimun thickness requirement to carryout  PWHT for CS .Kl.refer me the page no/Table.

 

Regards,

K.Venkateswaran.

 

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[John Henning]

PWHT requirements are specified in the “book” or construction Code sections (i.e.  Section I, Section VIII, B31.1) or by customer specification.  Sc IX on tells one the requirements for qualifying welding or brazing procedures  and personnel working to them.  As such Sc IX does not specify a minimum thickness for PWHT than the applicable procedure thickness range based on PQR thickness.

 

John

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[murugesan jeyaraman]

Hi venkateswaran

 

1) PWHT as per UCS-56 is mandatory for welded joints over 38 mm nominal thickness.

2)  for welded joints of  nominal thickness over 32 mm through 38 mm, PWHT is not required if  preheat is applied at a
minimum temperature of 95 degree celcius during welding.

 

Please go through all the notes, in UCS-56 for exceptions.

 

Thanks

 

Murugesan

[prem nautiyal]

Hi   For P1 Materials you can refer, Table UCS-56 , page number 161, of ASME Sec VIII Div 1, wherein PWHT is mandatory for weld joints over 38mm nominal thickness and etc....   Regards   Prem Nautiyal --- On Mon, 6/27/11, John Henning <jhen...@deltak.com> wrote: