Dear All,
Hi ,it is very glad to tell you all that our company has been authorised by AWS ( American society of welding) to conduct CWI certified welding and certiifcation programme. I have been invited by AWS MIAMI HQ to take part in the international conferance here. I am at present in NJ NEWJERSEY HOTAL HOWARD JOHNSON EXPRESS IN 1025 RT 22 WEST NORTH PLAINFIELD NJ 07060 PHONE 09087536500 I will leave NJ on 27th morning. I will remain in MIAMI -FLORIDA on 27th april night to Ist May morning . My address at Miami is Hotel Airport Mariott Miami. If any body is nearby there plz contact. Plz circulate the brouchere to all concerned.
FOR DASH INSPECTORATE
U.G.DAS
DIRECTOR
804,BLUE DIAMOND COMPLEX,
NEAR FATEHGUNJ PETROL PUMP
FATEHGUNJ-BARODA GUJARAT-INDIA-02
9327201999,0265 2700454,
MOBILE 09825164743
--- On Sun, 20/4/08, Jignesh Patel <nacemail@gmail.com> wrote:
From: Jignesh Patel <nacemail@gmail.com>
Subject: [MW:723] AET type exchanger test ring
To: materials-welding@googlegroups.com
Date: Sunday, 20 April, 2008, 9:16 PM
Dear Friends, I have seen few heat exchangers on this forum. I am an end user of heat exchangers in refinery. My query is related to test rings of exchangers. One of our new units has AET type exchangers [pull through type]. These exchangers have a floating tubesheet [FTS] with bolt holes and the floating head cover [FHC] is directly bolted to the floating tubesheet. The problem with this is that we can't carry out shell test using a conventional test ring due to several bolt holes on the floating tubesheet. Conventional AES exchangers have backing rings pressing the FHC against the FTS. I checked TEMA website and it says, test rings for such exchangers are possible and the bolt holes in the tubesheet need to be temporarily plugged. It also says refer to 4.13 (3) of TEMA. Unfortunately we don't have the latest edition of TEMA. Does any one have experience with test rings [for shell test] for AET type exchangers? I would appreciate a generic drawing / scheme showing how to carry out shell test of such exchangers. Thanks in advance. Thanks and regards, Jignesh Kuwait For your virus protection, any attachments should be considered uncontrolled unless they are identified in the text. The sender does not accept liability for any virus introduced by this email or any attachment.
Best Jokes, Best Friends, Best Food. Get all this and more on Best of Yahoo! Groups. --~--~---------~--~----~------------~-------~--~----~
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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.
-~----------~----~----~----~------~----~------~--~---
hi friends , i am plan to do project in cold cracking .. as we all know cold crack occurs mainly due to diffusible hydrogen in weld metal and haz .. i want to determine the optimum level of hydrogen in haz .. is there any method(test) to determine the safe level of hydrogen .. in the haz On Wed, Apr 23, 2008 at 8:09 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com> wrote:
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. -~----------~----~----~----~------~----~------~--~---
Hi I am zahid, I came to know about your group thru mechanical engineering group which I regularly join. I am working as a QAQC welding inspector and at the moment I am preparing to appear for AWS welding engineers exam. I would like to join your group and would welcome any assisitance for preparation on AWS Certified welding engineers exam. Best Regards Zahid
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
Source: Asian Oil & Gas March/April2008 Issue --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
One of the reason for determining the hydrogen in steel is to make critical decisions which involve welding / repairs in an inservice vessel. Vessels which operate in environments where significant amount of hydrogen charging occurs face a threat of cracking during weld repairs if there is significant amount of dissolved H2 in the material. For such instances, the vessel / part is first subject to hydrogen bake out and then weld repaired. Hydrogen bake out should be good enough to bring down the hydrogen level below the critical level. I am not sure why dissolved hydrogen is critical in new fabrication. Regards,
Jignesh Patel On Apr 23, 6:21 pm, "Raghuram Bathula" <raghurambath...@gmail.com>
wrote:
> 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 concentration
> of 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 <arunmech...@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.
-~----------~----~----~----~------~----~------~--~---
it is from one of the ASM Handbook (i will give the exact volume# once i come back to office in a couple of weeks), thou' i have never used and no idea why this has to be calculated, but it is given in a chapter in continuation with CE formulae
On Apr 24, 4:18 pm, "Tirumala B N Tagore" <tagore....@gmail.com>
wrote:
> Where from you take Rf?
> Is H for Hydrogen % or partial pressure?
> Finally how do you use Ph and in what relation?
> What are the reference books, standards in the above context.?
> Regards,
> tagore
>
> On Wed, Apr 23, 2008 at 8:50 AM, Bathula Raghuram (Mumbai - PIPING) <
>
> R.Bath...@ticb.com> wrote:
>
> > 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 concentration
> > of 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 <arunmech...@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.
-~----------~----~----~----~------~----~------~--~---
Where from you take Rf? Is H for Hydrogen % or partial pressure? Finally how do you use Ph and in what relation? What are the reference books, standards in the above context.? Regards, tagore On Wed, Apr 23, 2008 at 8:50 AM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com> wrote:
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 concentration
of 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. -~----------~----~----~----~------~----~------~--~---
Can you eloborate on Rf and refrence standard or technical literature on this.As i understand , the H2 partial pressure needs to be seen in the process stream and steel shall be suitable to be resistant . Regards, tagore On Wed, Apr 23, 2008 at 8:21 AM, Raghuram Bathula < raghurambathula@gmail.com> wrote: 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 PH is the cracking susceptibility parameter, H is the concentration of hydrogen (in parts per million), Rf 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. -~----------~----~----~----~------~----~------~--~---
Theer is no such method and also it is not the criteria to select the appropriate steel. We need to see hydrogen % in the process fluid being handled in the vessel and if it is above certain level, the steel shall be vacuum degassed one and also API 941 gives guidelines for steel selection. Tagore On Wed, Apr 23, 2008 at 2:58 AM, 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. -~----------~----~----~----~------~----~------~--~---
It works sir It is unusual to adopt floating tube sheet type hxr for more than 70 bar(g). In such a case you should have the tube to tube sheet weld as Strength welded joint and you do not need to have so much trouble with test ring + gland follower etc since you can ensure the integrity of TTP weld joint by halogen/ Helium test. If you can give me the fluids on both sides and design parameters, some other options can be there. Regards, tagore On Wed, Apr 23, 2008 at 9:14 PM, JP < naceindia@gmail.com> wrote: Dear Mr Tagore, Thanks a lot. I could visualize the way u suggested to test these type exchangers. My only worry is the test pressure for these hx. Some of these hx have a shell test pressure of 1000 psig and I am not sure if the rubber gasket will work. But will surely try to work out a solution accordingly. Thanks a lot for your reply. Regards, Jignesh Sub: Test ring arrangement for AET type Hxr shell side test to verify the Tube to tube sheet joint integrity This is not unusual. You need to use gland follower + gland ring set the same way as done for S type to obtain leak tight joint on OD of floating tube sheet . Additionally the Bolt holes of floating tube sheet need to be provided with plugs . This can be achived by using Bolts + rubber O ring or Flat rubber ring gasket placed in between the bolt head & rear side ( shell side ) face of floating tube sheet .In this method the bolts need to be placed in to the bolt holes from rear side of Floating tube sheet and you can tighten the nut on to the bolt from tube side of tube sheet i.e., from front side. The only problem is that in the event of leak even at one bolt hole , we need to remove the gland ring+ follower and attend. In some instances people use solid rubber cones attached to stud , place the stud entry from rear end so that conical rubber seats on to the bolt hole on rear side of tube sheet , tighetn the stud using a hex nut from front side. Care should be excersized not to damage the bonding of stud to solid rubber cone while tightening the stud . At present I do not possses the sketches showing the above arrangements. But these are very normal practices in the industry. In case any more information is needed one can contact me on my mobile +966562743138 on Thursdays and fridays. On 4/20/08, Jignesh Patel <nacemail@gmail.com> wrote: Dear Friends, I have seen few heat exchangers on this forum. I am an end user of heat exchangers in refinery. My query is related to test rings of exchangers. One of our new units has AET type exchangers [pull through type]. These exchangers have a floating tubesheet [FTS] with bolt holes and the floating head cover [FHC] is directly bolted to the floating tubesheet. The problem with this is that we can't carry out shell test using a conventional test ring due to several bolt holes on the floating tubesheet. Conventional AES exchangers have backing rings pressing the FHC against the FTS. I checked TEMA website and it says, test rings for such exchangers are possible and the bolt holes in the tubesheet need to be temporarily plugged. It also says refer to 4.13 (3) of TEMA. Unfortunately we don't have the latest edition of TEMA. Does any one have experience with test rings [for shell test] for AET type exchangers? I would appreciate a generic drawing / scheme showing how to carry out shell test of such exchangers. Thanks in advance. Thanks and regards, Jignesh Kuwait For your virus protection, any attachments should be considered uncontrolled unless they are identified in the text. The sender does not accept liability for any virus introduced by this email or any attachment. <br
--~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
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.
-~----------~----~----~----~------~----~------~--~---
Dear Mr Tagore, Thanks a lot. I could visualize the way u suggested to test these type exchangers. My only worry is the test pressure for these hx. Some of these hx have a shell test pressure of 1000 psig and I am not sure if the rubber gasket will work. But will surely try to work out a solution accordingly. Thanks a lot for your reply. Regards, Jignesh From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Tirumala B N Tagore
Sent: Tuesday, April 22, 2008 7:59 AM
To: materials-welding@googlegroups.com
Subject: [MW:725] Re: AET type exchanger test ring Sub: Test ring arrangement for AET type Hxr shell side test to verify the Tube to tube sheet joint integrity This is not unusual. You need to use gland follower + gland ring set the same way as done for S type to obtain leak tight joint on OD of floating tube sheet . Additionally the Bolt holes of floating tube sheet need to be provided with plugs . This can be achived by using Bolts + rubber O ring or Flat rubber ring gasket placed in between the bolt head & rear side ( shell side ) face of floating tube sheet .In this method the bolts need to be placed in to the bolt holes from rear side of Floating tube sheet and you can tighten the nut on to the bolt from tube side of tube sheet i.e., from front side. The only problem is that in the event of leak even at one bolt hole , we need to remove the gland ring+ follower and attend. In some instances people use solid rubber cones attached to stud , place the stud entry from rear end so that conical rubber seats on to the bolt hole on rear side of tube sheet , tighetn the stud using a hex nut from front side. Care should be excersized not to damage the bonding of stud to solid rubber cone while tightening the stud . At present I do not possses the sketches showing the above arrangements. But these are very normal practices in the industry. In case any more information is needed one can contact me on my mobile +966562743138 on Thursdays and fridays. On 4/20/08, Jignesh Patel <nacemail@gmail.com> wrote: Dear Friends, I have seen few heat exchangers on this forum. I am an end user of heat exchangers in refinery. My query is related to test rings of exchangers. One of our new units has AET type exchangers [pull through type]. These exchangers have a floating tubesheet [FTS] with bolt holes and the floating head cover [FHC] is directly bolted to the floating tubesheet. The problem with this is that we can't carry out shell test using a conventional test ring due to several bolt holes on the floating tubesheet. Conventional AES exchangers have backing rings pressing the FHC against the FTS. I checked TEMA website and it says, test rings for such exchangers are possible and the bolt holes in the tubesheet need to be temporarily plugged. It also says refer to 4.13 (3) of TEMA. Unfortunately we don't have the latest edition of TEMA. Does any one have experience with test rings [for shell test] for AET type exchangers? I would appreciate a generic drawing / scheme showing how to carry out shell test of such exchangers. Thanks in advance. Thanks and regards, Jignesh Kuwait For your virus protection, any attachments should be considered uncontrolled unless they are identified in the text. The sender does not accept liability for any virus introduced by this email or any attachment. <br
--~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
http://materials-welding.blogspot.com/2008/04/mw738-re-737-re-how-to-find-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.
-~----------~----~----~----~------~----~------~--~---
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 concentration
of 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
>
> >
>
--~--~---------~--~----~------------~-------~--~----~
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-~----------~----~----~----~------~----~------~--~---
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 PH is the cracking susceptibility parameter, H is the concentration of hydrogen (in parts per million), Rf 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. -~----------~----~----~----~------~----~------~--~---
Dear Groupmembers, I have uploaded the procedure sent by Mr Mohd Nasir Abbas on our google group. Any body interested may download the same from : http://groups.google.co.in/group/materials-welding/files?hl=en&upload=1 Thanks a lot Mr Abbas. Regards, Jignesh Patel On Tue, Apr 22, 2008 at 3:08 PM, Muhammad Nasir Abbas < m.nasirabbas@gmail.com> wrote: Dear Friends,
I tried to upload it to 2 different free servers but failed due to some
local administrator restrictions. I am emailing it to you. Please upload it
to some good free site and share the link to all.
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: JP [mailto: naceindia@gmail.com] Sent: Tuesday, April 22, 2008 12:04 PM To: 'Muhammad Nasir Abbas' Subject: ultrasonic testing for hic Dear Mr Abbas, Kindly request you to send me the scanned copy by gmail if possible. Thanks and regards, Jignesh Patel -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com] On Behalf Of Muhammad Nasir Abbas Sent: Tuesday, April 22, 2008 8:35 AM To: materials-welding@googlegroups.com Subject: [MW:727] RE: 724] ultrasonic testing for hic Dear Prakash, I have an scanned EXXON manual for "Ultrasonic detection of High Temperature Hydrogen attack in Carbone steels". Let me know if it can serve your purpose. I will upload it to some free server (9-10Mb approx.) like www.4shared.com for you. 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 gajjalla surya prakash Sent: Tuesday, April 22, 2008 9:56 AM To: materials-welding@googlegroups.com Subject: [MW:724] ultrasonic testing for hic dear members, is there any specific technique /method to find out HIC HIDROGEN INDUCED CRACKING using ultrasonic testing. surya prakash gajjalla ASSOCIATED ENGINEERING SERVICES. --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
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
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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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-~----------~----~----~----~------~----~------~--~---
Another Q&A taken from TNT on the subject Q. My Level III has advised that SNT-TC-1A 2001 paragraph 8.2.2
specifies a requirement for distinguishing between shades of gray and
has recommended a contrast sensitivity chart for this purpose. Can you
clarify the interpretation, as the general opinion from those I have
spoken to claim the contrast sensitivity chart is relevant to
radiography. My employer does not carry out any radiography and I am
not sure whether SNT-TC-1A makes a distinction between methods when
calling for this test. L.V., Aberdeenshire, UK
A. Paragraph 8.2.2 (Color Contrast Differentiation) of the 2001
edition of SNT-TC-1A states "The examination should demonstrate the
capability of distinguishing and differentiating contrast among colors
or shades of gray used in the method as determined by the employer.
This should be conducted upon initial certification and at three year
intervals thereafter." You can see that paragraph 8.2.2 specifies
colors or shades of gray. An exam to determine shades of gray that
might be appropriate for radiographic film interpretation would not be
an appropriate exam for penetrant tests that utilize visible red dye. Your query is one of many interpretation requests made regarding eye
exams recommended in SNT-TC-1A, and has been specifically addressed in
Inquiry 78-11 of Interpreting SNT-TC-1A. Part two of the response made
by the SNT-TC-1A Interpretations Panel explains the intention of
paragraph 8.2.2 as follows: "... such practical examinations include
checkpoints as appropriate to verify that the candidate's color vision
capabilities are adequate to satisfy the specific needs imposed by the
NDT method in question, the employers test equipment, procedures and
products." On Apr 22, 8:07 pm, Raghuram Bathula <raghurambath...@gmail.com>
wrote:
> Dear Mr Raghavendra
>
> I was just going thro the pages (In box) of TNT journal published by
> ASNT, the below is the extract
>
> 've noticed a few inquiries lately about Section 8.2.2 of SNT-TC-1A
> 2001 in the "Inbox". Having run into this particular issue myself a
> couple of years ago during an audit, I have this to offer. Section
> 8.2.2 states in part "... distinguishing and differentiating contrast
> among colors or shades of gray used in the method... ." In MT and PT
> inspections, this usually means color vision capable of determining
> red powder and/or red dye. In radiography this would be shades of
> gray. The Ishihara color vision test is one of the accepted and
> standard tests used to meet the needs and requirements for color
> vision tests. A test standard does exist for gray scale — the Pelli-
> Robinson test. Called my ophthalmologist and he referred me to a
> supplier. S.C., Bakersfield, CA
>
> However i could not find any links in the Bakersfield site
>
> for more information you may writre to him or call him {(The Editor of
> The NDT Technician (a.k.a TNT)}
> hhumphr...@asnt.org
> (800) 222-2768 X 206
> (614) 274-6899 fax
>
> On Apr 22, 4:49 pm, "RAGHAVENDRA PEMMARAJU" <r...@hzw.ltindia.com>
> wrote:
>
> > Can any one of you suggest who is the supplier of Pelli-Robinson test kit which is useful for gray scale test as per above requirement.
>
> > regards,
> > Raghavendra
>
> > Larsen & Toubro Ltd.www.larsentoubro.com
>
> > This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.
--~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
Dear Mr Raghavendra I was just going thro the pages (In box) of TNT journal published by
ASNT, the below is the extract 've noticed a few inquiries lately about Section 8.2.2 of SNT-TC-1A
2001 in the "Inbox". Having run into this particular issue myself a
couple of years ago during an audit, I have this to offer. Section
8.2.2 states in part "... distinguishing and differentiating contrast
among colors or shades of gray used in the method... ." In MT and PT
inspections, this usually means color vision capable of determining
red powder and/or red dye. In radiography this would be shades of
gray. The Ishihara color vision test is one of the accepted and
standard tests used to meet the needs and requirements for color
vision tests. A test standard does exist for gray scale — the Pelli-
Robinson test. Called my ophthalmologist and he referred me to a
supplier. S.C., Bakersfield, CA However i could not find any links in the Bakersfield site for more information you may writre to him or call him {(The Editor of
The NDT Technician (a.k.a TNT)}
hhumphries@asnt.org
(800) 222-2768 X 206
(614) 274-6899 fax On Apr 22, 4:49 pm, "RAGHAVENDRA PEMMARAJU" <r...@hzw.ltindia.com>
wrote:
> Can any one of you suggest who is the supplier of Pelli-Robinson test kit which is useful for gray scale test as per above requirement.
>
> regards,
> Raghavendra
>
> Larsen & Toubro Ltd.www.larsentoubro.com
>
> This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.
--~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
Can any one of you suggest who is the supplier of Pelli-Robinson test kit which is useful for gray scale test as per above requirement. regards, Raghavendra Larsen & Toubro Ltd. www.larsentoubro.com This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
From: RAGHAVENDRA PEMMARAJU [mailto:rpe@hzw.ltindia.com] Sent: Tuesday, April 22, 2008 9:23 AM To: Bathula Raghuram (Mumbai - PIPING) Subject: Gray scale test in NDT as per SNT-TC-1A Can you let me know the supplier of Pelli-Robinson test kit which is
useful as mentioned in subject matter? Now days I am not receiving the mails from MW group. pl.put this in the
same and include my e mail ID again. Regards
--~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
Dear Surya, Time of Flight Diffraction and Phased Array Scan are tools used for HIC detection. Let me know if you need more information. You might be interested to read this: Also you can visit www.tcreng.com and see the TofD related information. Regards Rohit Bafna
On Tue, Apr 22, 2008 at 12:56 AM, gajjalla surya prakash < gajjalla@gmail.com> wrote:
dear members,
is there any specific technique /method to find out HIC HIDROGEN
INDUCED CRACKING using ultrasonic testing.
surya prakash gajjalla
ASSOCIATED ENGINEERING SERVICES.
--~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
But that manual will only help detection of HTHA and not HIC. Rgds,
Jignesh Patel -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Muhammad Nasir
Abbas
Sent: Tuesday, April 22, 2008 8:35 AM
To: materials-welding@googlegroups.com
Subject: [MW:727] RE: 724] ultrasonic testing for hic
Dear Prakash,
I have an scanned EXXON manual for "Ultrasonic detection of High Temperature
Hydrogen attack in Carbone steels". Let me know if it can serve your
purpose. I will upload it to some free server (9-10Mb approx.) like
www.4shared.com for you. 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 gajjalla surya
prakash
Sent: Tuesday, April 22, 2008 9:56 AM
To: materials-welding@googlegroups.com
Subject: [MW:724] ultrasonic testing for hic
dear members,
is there any specific technique /method to find out HIC HIDROGEN
INDUCED CRACKING using ultrasonic testing.
surya prakash gajjalla
ASSOCIATED ENGINEERING SERVICES. --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
I too would like to see the copy of the manual for academic interest. Kindly request you to put it on any good shared website. Thanks. Jignesh Patel -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Muhammad Nasir
Abbas
Sent: Tuesday, April 22, 2008 8:35 AM
To: materials-welding@googlegroups.com
Subject: [MW:727] RE: 724] ultrasonic testing for hic
Dear Prakash,
I have an scanned EXXON manual for "Ultrasonic detection of High Temperature
Hydrogen attack in Carbone steels". Let me know if it can serve your
purpose. I will upload it to some free server (9-10Mb approx.) like
www.4shared.com for you. 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 gajjalla surya
prakash
Sent: Tuesday, April 22, 2008 9:56 AM
To: materials-welding@googlegroups.com
Subject: [MW:724] ultrasonic testing for hic
dear members,
is there any specific technique /method to find out HIC HIDROGEN
INDUCED CRACKING using ultrasonic testing.
surya prakash gajjalla
ASSOCIATED ENGINEERING SERVICES. --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
Dear Prakash, I have an scanned EXXON manual for "Ultrasonic detection of High Temperature
Hydrogen attack in Carbone steels". Let me know if it can serve your
purpose. I will upload it to some free server (9-10Mb approx.) like
www.4shared.com for you. 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 gajjalla surya
prakash
Sent: Tuesday, April 22, 2008 9:56 AM
To: materials-welding@googlegroups.com
Subject: [MW:724] ultrasonic testing for hic
dear members,
is there any specific technique /method to find out HIC HIDROGEN
INDUCED CRACKING using ultrasonic testing.
surya prakash gajjalla
ASSOCIATED ENGINEERING SERVICES. --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
Sub: UT for idfentifying cracks due to HIC As such there is no seperate UT. UT detects cracks , laminations and a wide range of defects. Regards, Tagore
On 4/22/08, gajjalla surya prakash <gajjalla@gmail.com> wrote:
dear members,
is there any specific technique /method to find out HIC HIDROGEN
INDUCED CRACKING using ultrasonic testing.
surya prakash gajjalla
ASSOCIATED ENGINEERING SERVICES.
--~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
Sub: Test ring arrangement for AET type Hxr shell side test to verify the Tube to tube sheet joint integrity This is not unusual. You need to use gland follower + gland ring set the same way as done for S type to obtain leak tight joint on OD of floating tube sheet . Additionally the Bolt holes of floating tube sheet need to be provided with plugs . This can be achived by using Bolts + rubber O ring or Flat rubber ring gasket placed in between the bolt head & rear side ( shell side ) face of floating tube sheet .In this method the bolts need to be placed in to the bolt holes from rear side of Floating tube sheet and you can tighten the nut on to the bolt from tube side of tube sheet i.e., from front side. The only problem is that in the event of leak even at one bolt hole , we need to remove the gland ring+ follower and attend. In some instances people use solid rubber cones attached to stud , place the stud entry from rear end so that conical rubber seats on to the bolt hole on rear side of tube sheet , tighetn the stud using a hex nut from front side. Care should be excersized not to damage the bonding of stud to solid rubber cone while tightening the stud . At present I do not possses the sketches showing the above arrangements. But these are very normal practices in the industry. In case any more information is needed one can contact me on my mobile +966562743138 on Thursdays and fridays. Regards, Tagore
On 4/20/08, Jignesh Patel <nacemail@gmail.com> wrote: Dear Friends, I have seen few heat exchangers on this forum. I am an end user of heat exchangers in refinery. My query is related to test rings of exchangers. One of our new units has AET type exchangers [pull through type]. These exchangers have a floating tubesheet [FTS] with bolt holes and the floating head cover [FHC] is directly bolted to the floating tubesheet. The problem with this is that we can't carry out shell test using a conventional test ring due to several bolt holes on the floating tubesheet. Conventional AES exchangers have backing rings pressing the FHC against the FTS. I checked TEMA website and it says, test rings for such exchangers are possible and the bolt holes in the tubesheet need to be temporarily plugged. It also says refer to 4.13 (3) of TEMA. Unfortunately we don't have the latest edition of TEMA. Does any one have experience with test rings [for shell test] for AET type exchangers? I would appreciate a generic drawing / scheme showing how to carry out shell test of such exchangers. Thanks in advance. Thanks and regards, Jignesh Kuwait For your virus protection, any attachments should be considered uncontrolled unless they are identified in the text. The sender does not accept liability for any virus introduced by this email or any attachment. --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
dear members, is there any specific technique /method to find out HIC HIDROGEN
INDUCED CRACKING using ultrasonic testing.
surya prakash gajjalla
ASSOCIATED ENGINEERING SERVICES. --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---
Dear Friends, I have seen few heat exchangers on this forum. I am an end user of heat exchangers in refinery. My query is related to test rings of exchangers. One of our new units has AET type exchangers [pull through type]. These exchangers have a floating tubesheet [FTS] with bolt holes and the floating head cover [FHC] is directly bolted to the floating tubesheet. The problem with this is that we can’t carry out shell test using a conventional test ring due to several bolt holes on the floating tubesheet. Conventional AES exchangers have backing rings pressing the FHC against the FTS. I checked TEMA website and it says, test rings for such exchangers are possible and the bolt holes in the tubesheet need to be temporarily plugged. It also says refer to 4.13 (3) of TEMA. Unfortunately we don’t have the latest edition of TEMA. Does any one have experience with test rings [for shell test] for AET type exchangers? I would appreciate a generic drawing / scheme showing how to carry out shell test of such exchangers. Thanks in advance. Thanks and regards, Jignesh Kuwait For your virus protection, any attachments should be considered uncontrolled unless they are identified in the text. The sender does not accept liability for any virus introduced by this email or any attachment. --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---
Any advice for cast iron welding Sent from Yahoo Mail for iPhone
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