PWHT criteria for NACE material

[pradip kumar sil]

Dear Exparts,
Can anybody tell me, NACE carbon steel PWHT heating/ cooling rate
where is it mentioned.
Regards
Pradip

[manivannan hemu]

Hi Pradip,

to my understanding NACE RP 0472 has guidelines for controlling
cracking by adopting the use of PWHT for Carbon steel weldments. This
recommended practice did specify the PWHT, heating rate and cooling
rate to be followed asper ASME construction code. (refer para 6.4 of
the above).

NACE RP is attached for your understanding.

Regards,
Manivannan.
Manger QA
Flowlink systems.Coimbatore.

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[Eswaran samikannu]

Hi Pradip,

 

Heating above 300 Deg C - APP Max 150 Deg C / Hr up to Soaking temperature around 620 Deg C ,It should below Tempering temperature of your product

 

Cooling rate - APP Max 150 Deg C / Hr up to 300 Deg C temperature after you can cool in air, you can get HRC Value below 22.

Refer the stress relieving temp at A.2.14 Welding in NACE book

By 

Jegan  

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[Raghuram Bathula]

please donot ditrubute codes/standards neither ask for it

thanks for co operation!