Re: [MW:14965] RE: 14919] Stress relieving Rejected for 5 min less soaking time.

Dear Sir,

This is what we experience (thinking beyond the CODE) form materials
-welding group experts.

Thanks,

Prashant Pansare
(IRS-Mumbai)
On 7/24/12, Chetan Kapadia <cbkapadia@yahoo.co.in> wrote:
> Dear All,
>
> I have been a CONSULTANT FOR such problem & my personal opinion is expressed
> as follow.
>
>
> I fully agree with views expressed so far.
>
> But bag to differ that "Code is a law, with engineering judgments.
> Hence the inspector has the rights to declare that the original HT was
> inadequate."
>
> Inspectors & total industry must resist the"REJECTION". We as intellectual &
> having seniority must become practical.
>
> How the code will revise???.
>
>
> ANS.: One is experiments (Pure research) & second is such chances that gives
> opportunity to experiment !!!
> _______________________________________________________________________________________________
>
> My understanding is that it is P1 material.
>
>
> In that case every pass normalizes the immediate bottom pass.
>
> Hence code requirement for P1 FOR MANDATORY SR is 32 mm & above thickness.
>
> SOLUTION:
>
> In any case
>
>
> 0. After SR=PWHT no PTC testing is required as per code--Unless for low
> temp. vessels. That means code is assuming that if every care is taken
> as per code then thereis not much of a change in mechanical properties of
> WELD & HAZ. Hence this minor time difference can not resultin tremendous
> non agreeable metallurgical & OR mechanical OR process guarantee
> type defect. Depending up onfinal use the best decision can be arrived at.
>
>
> 1.if sufficient length is available ON PRODUCT then carry out all DT.
>
> 2.if sufficient length is not available on product carry out HARDNESS survey
> on PP, HAZ & WELD.
> THIS WILL GIVE FAIR IDEA OF TT & WELD TENSILE VALUES. If + then proceed
> for all test on PTC.
>
> 3. Prepare additional Test piece & let it undergo simulated SR with less by
> 5 minutes. Test for all test required by
>
> product designed use.Prove with guts.Nothing goes wrong.
>
> Even if all above proves wrong accept the defeat with guts on
> experimenting.
>
> Please do it even for your self satisfaction. Who knows It might become a
> code case.
>
> How can we have code without negative tolerance on time: Whatsoever--???.
>
> All this is without any prejudice to the contribution by other experts in
> the group. Further comments welcome for better understanding on the issue.
>
>
> Best Regards,
> C.B.KAPADIA
> Free-Lance Fabrication Technology & API Monogram Certification consultant
>
>
>
> ________________________________
> From: pgoswami <pgoswami@quickclic.net>
> To: materials-welding@googlegroups.com
> Sent: Tuesday, 24 July 2012 5:42 PM
> Subject: RE: [MW:14949] RE: 14919] Stress relieving Rejected for 5 min less
> soaking time.
>
>
> Harish/Mohd,
>
> I am not trying to act as moderator.
>
> Looking at the problem, a separate simulation may be as
> time consuming as the original HT. Code is a law, with engineering
> judgments.
> Hence the inspector has the rights to declare that the original HT was
> inadequate. The simplest solution what looks to me is to perform additional
> SR
> for 15-20 mins and satisfy code requirements.
>
> PWHT time is all cumulative , and there no restriction
> form ASME code.
>
> Thanks.
>
> PradipGoswami,P.Eng.IWE
> Welding
> & Metallurgical Specialist
> Ontario, Canada.
> Email-pgoswami@sympatico.ca,
> pgoswami@quickclic.net
>
>
>
> ________________________________
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of Harish
> Kannepalli
> Sent: Monday, July 23, 2012 11:58 AM
> To: materials-welding@googlegroups.com
> Subject: Re: [MW:14942] RE: 14919]
> Stress relieving Rejected for 5 min less soaking time.
>
>
> You can propose the following to your client:
> Perform Simulation on separate
> coupon, check the mechanical & metallurgical properties. If they meet the
> code requirements, it may be acceptable. After all, code is made by humans
> for
> humans.
>
>
> 2012/7/23 John Henning <jhenning@deltak.com>
>
> Most common materials require 1 hour/25mm or 60minutes/25mm and I assume
> you are working with one of these materials. Then, for a 40mm thick
> material the required minimum soak time is (40mm)*(60min.)/(25mm) = 96
> minutes
>>
>>You don't meet Code required minimum soak time. Your soak time must
>> exceed the minimum time. Therefore, your pipe weld is unacceptable. No
>> discussion – it is clearly unacceptable in its present condition.
>>
>>John A. Henning
>>Welding & Materials
>>
>>From:materials-welding@googlegroups.com
>> [mailto:materials-welding@googlegroups.com] On Behalf Of mohd
>>Sent: Saturday, July 21, 2012 1:52 AM
>>To: materials-welding@googlegroups.com
>>Subject: [MW:14919] Stress relieving Rejected for 5 min less soaking
>> time.
>>
>>Dear expert,
>>
>>As per ASME 8-1-UCS-56
>>
>>We have done SR for our 40mm thk-30" pipe joint.
>>
>>but unfortunetly, soaking time was just short by 5min.Now our client/PMC
>> both are not agree to release.
>>
>>Required time : 1hr.15min
>>Actual Time : 1hr.10min
>>
>>It is acceptable OR could you share any technical view
>> to convince client?
>>
>>regards,
>>mohd.--
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>
> educational purposes only, Users must take their own decisions w.r.t.
> applicable code/standard/contract
> documents.
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>>The views
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>
> educational purposes only, Users must take their own decisions w.r.t.
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>
>
> --
>
> regards,
> Harish.
> --
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> 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.
>
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> 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.
>
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> 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.
>


--
*Prashant Pansare*
*(IRS - Mumbai)*

--
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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.