Materials & Welding

  Dear Members   Can anyone post me the data as regards "construction of radiography chamber ' used  in the site for taking X ray of welded pipes and tubes . The approximate dimension shall be 20 meter long with 12 meter width  brick and mortar construction . Raidation level shall have to  be maintained within 50 curie Regards ramadasgururaj@gmail.com --~--~---------~--~----~------------~-------~--~----~ 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 Gents,   This is for 1'' fittings like Elbows, TEE etc   Appreciate if somebody could advice me whether I can accept this. The vendor is telling that if it's BE, then it will be A234 GR.WPB, SCH 160, BE for 1'' fittings.   Kindly advice.   As per Spec Vendor offered 6000 LB, FS, BE A-181 GR.1 A234 GR.WPB, SCH 160, BE 6000 LB, FS, BE A-181 GR.1 A234 GR.WPB, SCH 160, BE 3000 LB, FS, BE A-181 GR.1 A234 GR.WPB, SCH 160, BE     Thank you,   Regards,   Sabir --~--~---------~--~----~------------~-------~--~----~ 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 decisio...

Hi all, I need your help for technical clarification for fire safe testing on Hastelloy Ball Valves. We are buying soft seated Hastelloy On-Off ball valves, as per specifications all soft seated valves shall be fire safe design and a fire safe certificate is must. The manufacturer is now taking up the Fire test at China but they are using the body material Austenitic SS (304 / 316). They claimed that the Hastelloy can be classified as 'Austenitic' within the generic classification defined in API 607. I have a queries as below: 1.) Whether the Hastelloy material C-276 can be classified as Austenitic material within the generic classification defined in API 607. Please provide the reference that defines this. 2.) If the answer to 1.) is yes, whether testing on any austenitic material, say 304 or 316, can qualify the fire test capability of Hastelloy valves. The relevant section of API 607 is appended below for your ready reference. Thanks in advance, Regards...

Dear Mr. Tagore, Thanks for your immediate reply. API has yet to release the appendix related to AST as part of API-581. I understand API is in the initial stages of developing the logic for the AST RBI/temporarily stopped the further development. However, some consultants might have developed their own RBI software for AST evaluation and few oil companies might have implemented them. Example: ------has a very effective RBI software for static equipment/piping excluding AST. However their incomplete version of AST software is also available in the market but without roof evaluation. Our requirement is specific, to have RBI software for AST including fixed/floating roof evaluation. Pl. share with me if you come across any agency/company supplying complete AST RBI evaluation. Regards Srinivasa Murthy Hari On 4/27/08, Tirumala B N Tagore < tagore.tbn@gmail.com > wrote: Could you see API 653? It may not give RBI guidelines seperately for AST similar to guide lines for Pr...

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:...

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. ...

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 ...

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 >...

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 t...

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 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 >...

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 document...

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   ...

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...

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 ...

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 23/04/2...

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...

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 ...

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 ] ...

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

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 shad...

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 ...

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. applica...

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: http://www.ndt.net/article/tofd/hecht/hecht.htm   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...

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...

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...

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 pr...

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  pe...

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 appreciat...