RE: [SOCIAL NETWORK] Re: [SOCIAL NETWORK] [MW:30111] Is PWHT required

Considering that A333 gr.6 is P-1 , there appears to be no PWHT requirement as per 31.3 table 331.1.1purely for the butt weld joint between the pipe portion of nozzle and the piping to be hooked up with it considering the pipe thickness .

 

It would be better if the specification writeup is shared to understand as to why PWHT has been put in place for the piping concerned as per your statement.  

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Nadakuditi kiran kumar
Sent: 03 October 2019 17:11
To: materials-welding@googlegroups.com
Subject: [SOCIAL NETWORK] Re: [SOCIAL NETWORK] [MW:30107] Is PWHT required

 

dear gents,

Please find below mentioned details.

MOC is A333 Gr 6, thickness of nozzle is 6" NB-14.27mm, pipe thickness is 6" NB -7.11 mm. Flange is WNRF - A350 LF2{(Which needed to be cut).

 

On Thu, 3 Oct, 2019, 2:00 PM Hemant W Joshi, <hwjoshi@tce.co.in> wrote:

Without knowing the piping matl or thickness, it would be imprudent to provide opinion about PWHT.

The flange it is assumed is a SO.  

Certainly it is required to communicate to the inspector for reinspection/restamping.   

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Nadakuditi kiran kumar
Sent: 01 October 2019 19:32
To: materials-welding@googlegroups.com
Subject: [SOCIAL NETWORK] [MW:30100] Is PWHT required

 

Dear Gentleman,

We have received two vessels as per drawing. ASME U stamp done on both vessels, there is one bottom outlet nozzle of 6"NB in both vessels. Now client is asking us to remove the flange of the nozzle and hook up with piping. My doubt is 

1. Whether we have to take approval from authorized inspector before going to do any modification.

2. After hook up we have to do PWHT for that hook up joint

Please clarify, if possible please provide code reference.

Line SERVICE not call any PWHT

Construction code for vessel is ASME Sec VIII, Div 1, piping construction code is B 31.3.

 

Thanks in advance,

 

 

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