Heating /cooling rate in PWHT

[pradip kumar Sil]

Dear All,

Can anybody inform me,  Piping PWHT  heating & cooling rate where i will get in B-31.1/B31.3.

Thanks & Regards

Pradip

[pradip kumar Sil]

 B-31.1 PARA 132.5 it is mentioned PWHT Heating & Cooling requirement.

Above 600F( 315 degree centrigrade ), the rate of heating & cooling shall not exceed 600 degree Fahrenheit/Hr ( 315 degree centrigrade/hour) divided by one half the maximum thickness of material in inchat weld, but in no case shall the rate exceed 600 degree fahrenheit/hr ( 325 degrre centrigrade/hour )

My question is how i will calculate, if in case 36mm thickness in carbon steel as well as 36 mm thickness in P-91 material

BR

Pradip

---------- Forwarded message ----------
From: <hwj...@tce.co.in>
Date: Thu, May 7, 2015 at 1:12 AM
Subject: Re: [MW:23221] Heating /cooling rate in PWHT
To: prad...@gmail.com
Cc: materials-welding <material...@googlegroups.com>



It is available .Refer chapter of fabrication, assembly and erection ,in it.







your truly
H W JOSHI
ENGINEER MECHANICAL
TATA CONSULTING ENGINEERS LTD
MUMBAI - 400 083
TEL : 022 61148414

pradip kumar Sil <prad...@gmail.com> Sent by: material...@googlegroups.com 07-05-2015 11:11 Please respond to material...@googlegroups.com

To materials-welding <material...@googlegroups.com> cc Subject [MW:23221] Heating /cooling rate in PWHT

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