Re: [MW:13250] Technical Query for MIXER / ASME B 31.3 Vs ASME Sec VIII Div 1

Though according to ASME B31.3, it falls under Category M Fluid service for which if P1 material PWHT exempted upto 20mm as per Table 331.1.1 but if client is particular then it is advisable to do PWHT.

 

Thanks & Reagrds
 
J.Gerald Jayakumar
00968-93281596

From: Vino Varghese <vinopvarghese@gmail.com>
To: materials-welding@googlegroups.com
Cc: Vinop Varughese <vinop.varughese@qcon.com.qa>
Sent: Wednesday, December 21, 2011 3:21 PM
Subject: [MW:13247] Technical Query for MIXER / ASME B 31.3 Vs ASME Sec VIII Div 1

Dear Experts,

 

We have a Piping Component, named MIXER(Sour Service & Lethal) which is coming in line with Pipeline.

 

1. The Data Sheet of this Mixer refers to Calculation part as per ASME Sec VIII, Div 1 , 2010 Ed.

2. The fabrication, inspection, testing refers to ASME B 31.3.

 

Query: Client is requesting to do Post Weld Heat Treatment for all the Weld joints as service is Lethal(UW-2 of ASME Sec VIII, Div 1 ).

 

We tried to convince Client stating that this requirement of PWHT is not required as per ASME B 31.3 as this is not a Pressure Component(U-1(c)(2)(e), ASME Sec VIII, Div 1) and moreover, only the Calculation part of MIXER has been considered in accordance to ASME Sec VIII, Div 1.

Client still insisit for PWHT of all related weld joints as the Process stream of this mixer has been considered "LETHAL", hence it is applicable to MIXER too. The MIXER is completed, painted and recieved at our end from Supplier without PWHT.

 

Please provide your technical support to justify the Query and what further appropriate action can be considered.

 

Thanks & Regards

Vino P Varghese

Doha- Qatar

 

 

 

 

 

 

 

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.