Re: [MW:15086] 14919] Stress relieving Rejected for 5 min less soaking time.

Dear all,

Thanks for these good discussion.but finally no way we had to do re PWHT for this small mistake.

But as part of our satisfaction we had done simulation of same timing 5-7 min less on one test piece.Found all requirement is in order.except hardness which was slightly higher but different compare to earlier established WPS is almost negligible.

Root cause:

1. Mis-communication between supervisor shift changing.

thanks,

mohd.

On Tuesday, August 7, 2012 6:34:54 PM UTC+1, sachin sankhe wrote:

Hi Friends

ASME SEC IX gives relaxation on soaking time i.e atleast 80% of that required on production joint

Regards

Sachin.Sankhe




From: "pgoswami" <pgos...@quickclic.net>
Sent: Wed, 25 Jul 2012 17:44:39
To: <material...@googlegroups.com>
Subject: Re: [MW:14949] 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.

 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

---

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Harish Kannepalli
Sent: Monday, July 23, 2012 11:58 AM
To: material...@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 <jhen...@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: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of mohd
Sent: Saturday, July 21, 2012 1:52 AM
To: material...@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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regards,

Harish.

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