ASME B31.3 -2014 Table 331.1.1 Soaking time for P1 material

[SWI]

Hi Team,

Could any please clarify

What is the minimum required soaking time for P1 material with wall thick 12mm, as per ASME B31.3 year 2014 Table 331.1.1 .

Is it still Minimum one hour per 1 Inch wall thickness or Minimum 15 Minutes...

Regards,

Ram

[MW]

first of all, there is no necessity to attach code/std (or any copyright material) 

refer previous post [MW:591] Re: Copyright issues.

[MK]

For P no. 1 & 12 mm, the minimum soaking time for PWHT is 29 minutes & same is calculated from one hour per inch.

Also please note, the minimum 15 minutes in code, is for only if your value for minimum soaking time(after calculating from one hour per inch for respective thickness) is less than 15 minutes, for eg if you get 14 minutes then you should consider minimum 15 minutes.

Regards

[Rajendra Jadhav]

Dear,
For your information the latest edition ASME B31.3 says there is no any requirements of PWHT.
If the wall thickness is more then will do preheat @95 Deg Celsius and which exemption of PWHT.

Regards,
Rajendra Jadhav

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[SWI]

Hi Team,

Thanks for the Reply,

Seems for P1 material Minimum 1 hour soaking time requirement has been revised to minimum 15 minutes upto less than one inch wall thickness...

is there any code case on this issue... if there please share the number.

I am aware of PWHT exemptions. which are newly added in ASME B31.3 2014, however all those requirement are there in ASME Sec IX from long time..

Actually thought of attaching screen shot of Table T331.1.1, overlook attached 2004edition.

Regards,

RAM

[Neem Lal]

For P1 material up to 20 mm thickness no need PWHT.

On Monday, 29 May 2017 15:33:46 UTC+5:30, SWI wrote:

[Ganesan]

Dear Sirs

Kindly take a look