Re: [MW:12493] ASME SEC IX Code Issue

Dear Limesh

As per ASME Sec IX , Pre heat is essential variable not supplementary essential variable hence it is mandatory to observe the requirement of QW406.1

Inter pass temperature is supplementary requirement. However it is not applicable if PWHT performed above upper transformation temp i.e Normalizing, solution annealing as per QW 406.3

Hence in your case It doesn't give exemption to the requirement for Inter pass temperature


Best Regards

Rajesh Patel
Executive Engineer  - Materials Technology, QA/QC & Standards

Linde Engineering India Pvt. Ltd.
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From:        usman gani <usmangania123@gmail.com>
To:        materials-welding@googlegroups.com
Date:        21-09-2011 15:25
Subject:        Re: [MW:12491] ASME SEC IX Code Issue
Sent by:        materials-welding@googlegroups.com

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On 9/16/10, george.dilintas@gr.bureauveritas.com
<george.dilintas@gr.bureauveritas.com> wrote:
> According to ASME IX, QW-406.3, when the Preheat is a supplementary
> essential variable, an increase of more than 55 degC in the max Interpass
> temperature requires requalification.
> I would suggest you read carefully QW 406.1 to  406.3
>
> Dr. G. Dilintas - Authorized Inspector Supervisor
> I&F Regional Technical Manager
> Bureau Veritas Piraeus - Greece
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> Fax: +30 210 40 63 118
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>              limesh M
>              <limesh78@gmail.c
>              om>                                                        To
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>                                                                    Subject
>                                        [MW:6999] ASME SEC IX Code Issue
>              14/09/2010 15:43                                          Ref
>
>
>              Please respond to
>              materials-welding
>              @googlegroups.com
>
>
>
>
>
>
> Dear All,
> Design Code: ASME B31.3     Welding Code: ASME SEC IX
> I have a Low temperature carbon steel impact tested PQR with a PWHT range
> of 600⁰±10⁰C.Is this condition giving an exemption for me on QW406.3 to
> prepare a WPS with maximum interpass temperature of 200⁰C.
> Maximum interpass temperature observed during specimen welding: 140⁰C
>
> Regards,
>
> Limesh
>
>
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