[MW:741] RE: 739] how to find hydrogen concentration

Dear all,

We used a similar system detailed at http://www.nde.com/hydrogen.htm to
evaluate the remaining life of C-1/2Mo components and for hydrogen pressure
we multiplied (absolute system pressure) with (molar fraction of H2 gas)
thereby giving partial pressure of Hydrogen only.

Above procedure cater for the incubation times for HIC also which are not
considered at design stage as in API-941.

Best regards,

Muhammad Nasir Abbas
Sr. Inspection Engineer,
Fauji Fertilizer Company Limited, Mirpur Mathelo 65050, Distt. Ghotki,
Pakistan.
Ph. +92(723)652301-10 (Off: 3414), Fax. +92(723)651303, Mob. +92(333)4774047
Email: abbas_nasir@ffc.com.pk; m.nasirabbas@gmail.com
Save a TREE: Avoid printing this email, unless really need to!

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Bathula Raghuram
(Mumbai - PIPING)
Sent: Thursday, April 24, 2008 8:10 AM
To: materials-welding@googlegroups.com
Subject: [MW:739] how to find hydrogen concentration

http://materials-welding.blogspot.com/2008/04/mw738-re-737-re-how-to-fin
d-hydrogen.html

Please check above link for the same.

-----Original Message-----
From: donboscomarine@vsnl.net [mailto:donboscomarine@vsnl.net]
Sent: Thursday, April 24, 2008 8:09 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:738] RE: 737] Re: how to find hydrogen concentration

Dear Mr. Bathula,

It is difficult to open a .DAT file. Will it be possible to send it as
any other attachment.

Thanks and best regards.

G. A. Soman
PRINCIPAL

----- Original Message -----
From: "Bathula Raghuram (Mumbai - PIPING)" <R.Bathula@ticb.com>
Date: Wednesday, April 23, 2008 9:23 pm
Subject: [MW:738] RE: 737] Re: how to find hydrogen concentration
To: materials-welding@googlegroups.com

>
> the formula is not appering in the message, hence resending as an
> attachment.
> -----Original Message-----
> From: materials-welding@googlegroups.com on behalf of Raghuram Bathula
> Sent: Wed 23/04/2008 20:51
> To: materials-welding@googlegroups.com
> Subject: [MW:737] Re: how to find hydrogen concentration
>
> May i know why you need this calculation? if possible please
> detaile it for
> the benifit of all members. probably the following would help you!
>
> This formula is used for detecting cracking susceptibility of
> steels and is
> valid only for certain range of steels
>
>
>
> Where *P*H is the cracking susceptibility parameter, H is the
> concentrationof hydrogen (in parts per million), *R*f is the
> restraint stress (in
> megapascals), and:
>
>
>
>
> Good luck!
>
> On Wed, Apr 23, 2008 at 3:28 PM, mech <arunmecheng@gmail.com> wrote:
> >
> > is there any mathematical formula to find optimum level of hydrogen
> > concentration in steels
> >
> > >
> >
>
>
>
>
>
>
> >
>

--~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---