Re: [MW:26937] preheating required for T12 material

Please see below the requirement from ASME Sec.I Power Boilers.

I suppose PW-39 exemptions are applicable only for socket welds & seal welds. Hope some experts can throw more light on this subject.

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

On Monday, October 23, 2017, 8:45:39 AM GMT+4, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Please find below the requirement from Power Piping ASME B31.1

Please find below the Requirement from ASME Sec.VIII Div.I

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

On Monday, October 23, 2017, 6:28:03 AM GMT+4, Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

If you do not go for SR, then you have to do preheat otherwise no. Pl ref PW39

On 23-Oct-2017 7:49 am, "'james gerald' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Both Chromium and Molybdenum increases hardenability(propensity to Brittleness) and hence required to be pre-heated.

Please follow below guidelines table.

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

On Sunday, October 22, 2017, 1:46:51 PM GMT+4, 'Sankaran Sp' via Materials & Welding <materials-welding@ googlegroups.com> wrote:

Dear Mr.Rameez,

T12 is alloy steel and it is having additional alloying elements with Cr,Mo combinations, hence pre- heating is advisable before welding.  

Regards,

Sankaran.SP

On Tuesday 10 October 2017, 8:01:14 AM IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Dear Experts,

                      can any one tell me pre-heating required for T12 material blow 6mm . This material in boiler water wall . Please tell me with standard and where i found this in ASME

THANKING YOU 

RAMEEZ  

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