Materials & Welding

  Hi Raghuram,   Thanks for your quick response and sharing.   With kind regards, A. Kiran Babu Dir-Marketing Magna Design Technologies Pvt Ltd (formerly known as "Ice Cube Engineering Solutions Pvt Ltd") Phone: +91 80 26764690, Cell: 93424 10446 Mail: kiran@magnadts.com web: magnadts.com       On Fri, Oct 31, 2008 at 2:28 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: I suppose it is a CS corresponding equivalents are St37-2, ASTM A 36, BS40B. however your designer must verify the chem/mech properties before substitution BR -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ]On Behalf Of Kiran Sent: Friday, October 31, 2008 9:49 AM To: Materials & Welding Cc: kiranbabua@gmail.com Subject: [MW:1261] SS 1312(sweden)  I,m looking for alternate material as substitute for SS 1312. I request group members to suggest... preferred p...

I suppose it is a CS corresponding equivalents are St37-2, ASTM A 36, BS40B. however your designer must verify the chem/mech properties before substitution BR -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ]On Behalf Of Kiran Sent: Friday, October 31, 2008 9:49 AM To: Materials & Welding Cc: kiranbabua@gmail.com Subject: [MW:1261] SS 1312(sweden) I,m looking for alternate material as substitute for SS 1312. I request group members to suggest... preferred per UN or ISO. With best regards, Kiran CONFIDENTIALITY NOTICE This e-mail and any attachments there to contain information, which is confidential, proprietary, privileged and/or protected from disclosure by intellectual property rights and are intended for the sole use of the recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any dissemination or copying of this message is strictly prohibited. If you have re...

I,m looking for alternate material as substitute for SS 1312. I request group members to suggest... preferred per UN or ISO. With best regards, Kiran --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

Hello everybody! currently I'm reviewing the mechanical design of an ASME III Class 2 Heat exchanger. The designer proposes a fixed tubesheet configuration where the shell and channel are groove welded to the tube-sheet according to the code allowed weld details. Additionally, one of the supports of the equipment (saddle supports) has been placed near the shell-channel- tubesheet joint. The saddle support is attached to the rest of the equipment using a reinforcement pad which takes the whole angle of the saddle support. The pad is planned to be fillet welded in the whole perimeter so this implies that the two horizontal pad welds cross the circumferential welds of the tubesheet. In this scenario I haven't found any provision concerning this question in the code. Could anybody report to me any experience about if this configuration is code allowed or not, and in the case that the configuration would be OK, please send me any comments about the suitability of this design. I...

Hi May any one help me for getting the properties like Young's Modulus, UTS, Yield, CTE, Poisson's ratio, Thermal Conductivity of Mica material.   Best Regards.   Ritesh --~--~---------~--~----~------------~-------~--~----~ 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 sir, the hardness profile of HAZ ie., the hardness value will high in HAZ or weld, for carbon steel of .1% carbon in flash butt weding -- Ganeshkumar M Mobile: 9442510888 --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

Effect of Carburizing Temperature on Carbon Penetration The penetration of carbon into the steel in gas carburizing depends on the carburizing temperature, the time at temperature, and the carburizing agent. Because the solubility of carbon is greatest above the Ac3 temperature, carburization takes place most readily above this temperature.  Furthermore, the higher the temperature is, the greater the rate of carbon penetration will be, because the rate of diffusion is greater. Thus, it is customary to select a temperature approximately 40°C (70°F) above the Ac3 point. The time at the carburizing temperature is the most influencing factor in the control of the depth of carbon penetration. Temperatures as low as 790°C and as high as 985°C (1450 and 1800°F) have been used for carburizing.   

Dear All, In some welding processes such as CRC welding /Narrow gap welding  it is even difficult to identify the HAZ and it becomes it very important to use hardness testing and we need to use HV 5 instead of HV 10 in order to determine hardness in HAZ which is more critical    in case of  low heat input welding process ( ref EPC 16 publication ). Best Regards, Francis lobo ----- Original Message ----- From: Bathula Raghuram (Mumbai - PIPING) To: materials-welding@googlegroups.com Sent: Tue, 28 Oct 2008 19:12:18 +0530 (IST) Subject: [MW:1255] RE: 1253] RE: 1250] Re: HAZ Partial weld around a pipe joint with clear heat affected zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved prepared ends. An automated TIG orbital welder made half an orbit before aborting. The heat affected zone is clearly visible because of the polished ends, even though it is generally inoccuous in this material. (SA106 Grade B) Photo by Yannick Trottier, 2006.  ...

Dear Sir,   In Api 650 ther is no where mention about permanent attachment of shell to horizontal and vertical weld distance or if its fouling in group I,II,III materials.   Please clarify   Regards   Sankar --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

Partial weld around a pipe joint with clear heat affected zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved prepared ends. An automated TIG orbital welder made half an orbit before aborting. The heat affected zone is clearly visible because of the polished ends, even though it is generally inoccuous in this material. (SA106 Grade B) Photo by Yannick Trottier, 2006. -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of CKPurohit Sent: Tuesday, October 28, 2008 9:57 AM To: materials-welding@googlegroups.com Subject: [MW:1253] RE: 1250] Re: HAZ Dear Shailesh,   As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed...

Dear Members,   Thanks for your feedback. I got the reply I wanted from you.   Regards,   Shailesh --- On Tue, 10/28/08, CKPurohit <ck@knm-group.com> wrote: From: CKPurohit <ck@knm-group.com> Subject: [MW:1253] RE: 1250] Re: HAZ To: materials-welding@googlegroups.com Date: Tuesday, October 28, 2008, 2:27 PM Dear Shailesh,   As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can see after etching too).   I hope experienced people like Mr Kalayan can comment on statement as he might have seen many cross section HAZ after etching…..   Regards.   C. K. Purohit  General Manager QA / QC / WELDING / NDT / R&D KNM Process Systems Sdn Bhd - Malaysia   HP - +60...

Dear Shailesh,   As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can see after etching too).   I hope experienced people like Mr Kalayan can comment on statement as he might have seen many cross section HAZ after etching…..   Regards.   C. K. Purohit  General Manager QA / QC / WELDING / NDT / R&D KNM Process Systems Sdn Bhd - Malaysia   HP - +6016 337 6448     From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kalyan Elcalabs Sent: Sel, 28 Okt 08 02:42 pm To: materials-welding@googlegroups.com Subject: [MW:1250] Re: HAZ   Dear Shailesh,   There is no thumb rule f...

what is the chemical analysis & thickness of stress relief base metal? From: "kataiah@bilfal.com" <kataiah@bilfal.com> To: materials-welding@googlegroups.com Sent: Sunday, October 26, 2008 12:08:27 PM Subject: [MW:1240] Which WPS can be used Dear Frinds , I have a requirement to weld  Stress relievedCS  plate # normal CS Plate. Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT). ASME is refering anywhere which type to be used? What is the logic to use perticular type?. Regards P.K. Bilfal Industries.   --~--~---------~--~----~------------~-------~--~----~ 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 edu...

hi if you look for for a thumb rule about haz that it is used in each situation ,it not exist. but i prefer some following below,considered: chemical analysis of parent metal(carbon equivalent) thickness of parent H.I & preheat depends on process joint design if you express a special case,i can help more detail bye From: shailesh dave <snd2988@yahoo.com> To: materials-welding@googlegroups.com Sent: Saturday, October 25, 2008 12:44:10 PM Subject: [MW:1244] HAZ DEAR MEMBERS,   WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.   REGARDS,   S.N.DAVE I/C QA/QC DAS ISLAND UAE --~--~---------~--~----~------------~-------~--~----~ 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 expres...

Dear Shailesh,   There is no thumb rule for the formation of HAZ. This largely depends on welding procedure, equipment used, various consumables, electrical parameters, operators skill and the uncertainities contributed by them. Normally one should expect minimum HAZ as is it not a desirable phenomena in any welding process.   N. Kalyan. ELCA Laboratories.     ----- Original Message ----- From: shailesh dave To: materials-welding@googlegroups.com Sent: Monday, October 27, 2008 6:53 PM Subject: [MW:1247] Re: HAZ DEAR SACHIN,   LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.   REGARDS,   SHAILESH --- On Mon, 10/27/08, sachin sankhe < sachin.sankhe@rediffmail.com > wrote: From: sachin sankhe < sachin.sankhe@rediffmail.com > S...

Dear sir I beg to inform you to doing welding without deflection during high temperature welding operation you can use from warm sand and cooling process must be doing slow and controlled -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of shailesh dave Sent: Saturday, October 25, 2008 12:44 PM To: materials-welding@googlegroups.com Subject: [MW:1244] HAZ DEAR MEMBERS, WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING. REGARDS, S.N.DAVE I/C QA/QC DAS ISLAND UAE --~--~---------~--~----~------------~-------~--~----~ 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 on...

DEAR SACHIN,   LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.   REGARDS,   SHAILESH --- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote: From: sachin sankhe <sachin.sankhe@rediffmail.com> Subject: [MW:1246] Re: HAZ To: materials-welding@googlegroups.com Date: Monday, October 27, 2008, 5:34 PM   Hi Shailesh Your question is not clear Regards Sachin On Sat, 25 Oct 2008 shailesh dave wrote : >DEAR MEMBERS, > >WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING. > >REGARDS, > >S.N.DAVE >I/C QA/QC DAS ISLAND UAE > > > >> --~--~---------~--~----~------------~-------~--~----~ 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-...

Dear Sachin, I think he requires information reqarding How HAZ will be formed during welding, What will be its crystal stractures compared to base material & weld metal, Its properties like tensile, hardness, impact campared to B/M & weld metal etc. In total he requires welding metallurgy of welds. regards P.K ----- Forwarded by Kataiah/BelleliSA on 27/10/2008 04:12 م ----- "sachin sankhe" <sachin.sankhe@rediffmail.com> Sent by: materials-welding@googlegroups.com 27/10/2008 03:04 م Please respond to materials-welding                 To:        <materials-welding@googlegroups.com>         cc:                 Subject:        [MW:1246] Re: HAZ   Hi Shailesh Your question is not clear Regards Sachin On Sat, 25 Oct 2008 shailesh dave wrote : >DEA...

  Hi Shailesh Your question is not clear Regards Sachin On Sat, 25 Oct 2008 shailesh dave wrote : >DEAR MEMBERS, > >WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING. > >REGARDS, > >S.N.DAVE >I/C QA/QC DAS ISLAND UAE > > > >> --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

 If your production weld is undergoing PWHT than u have to use with PWHT WPS otherwise without PWHT. Base material Heat treatment condition before welding is not essential & also with base metal heat treatment condition u cannot decide WPS - PWHT requirement. On Sun, Oct 26, 2008 at 12:38 PM, < kataiah@bilfal.com > wrote: Dear Frinds , I have a requirement to weld  Stress relievedCS  plate # normal CS Plate. Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT). ASME is refering anywhere which type to be used? What is the logic to use perticular type?. Regards P.K. Bilfal Industries.   --~--~---------~--~----~------------~-------~--~----~ 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/...

Use WPS w/o PWHT! -----Original Message----- From: kataiah@bilfal.com [mailto:kataiah@bilfal.com] Sent: Monday, October 27, 2008 9:07 AM To: Bathula Raghuram (Mumbai - PIPING) Subject: Fw: [MW:1242] RE: 1240] Which WPS can be used Dear Sir, Iam not going to do PWHT  after welding. reards ----- Forwarded by Kataiah/BelleliSA on 27/10/2008 11:05 ص ----- "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com> Sent by: materials-welding@googlegroups.com 27/10/2008 10:47 ص Please respond to materials-welding                 To:        <materials-welding@googlegroups.com>         cc:                 Subject:        [MW:1242] RE: 1240] Which WPS can be used it depends on after treatment of this weld, is this w...

it depends on after treatment of this weld, is this weld required or subjected to PWHT? -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kataiah@bilfal.com Sent: Sunday, October 26, 2008 9:38 AM To: materials-welding@googlegroups.com Subject: [MW:1240] Which WPS can be used Dear Frinds , I have a requirement to weld  Stress relievedCS  plate # normal CS Plate. Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT). ASME is refering anywhere which type to be used? What is the logic to use perticular type?. Regards P.K. Bilfal Industries.   CONFIDENTIALITY NOTICE This e-mail and any attachments there to contain information, which is confidential, proprietary, privileged and/or protected from disclosure by intellectual property rights and are intended for the sole use of the recipient(s) named above....

Dear Frinds , I have a requirement to weld  Stress relievedCS  plate # normal CS Plate. Which WPS can is use to weld such combination ( i mean a WPS with PWHT or with out PWHT). ASME is refering anywhere which type to be used? What is the logic to use perticular type?. Regards P.K. Bilfal Industries.   --~--~---------~--~----~------------~-------~--~----~ 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,   Have you ever heard about Siloxrine paint coating? (Waste water brine service).   Members please share your views regarding the application of above painting system.   Regards,   S.Mathusoothanan    --~--~---------~--~----~------------~-------~--~----~ 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,   WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.   REGARDS,   S.N.DAVE I/C QA/QC DAS ISLAND UAE --~--~---------~--~----~------------~-------~--~----~ 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 RP1110 which is for liquid petroleum pipelines refers back to B31.4 and 49 Code of federal regulations part 195. "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com> Sent by: materials-welding@googlegroups.com 24/10/2008 09:47 Please respond to materials-welding@googlegroups.com To <materials-welding@googlegroups.com> cc Subject [MW:1237] RE: 1236] Hydro test-max holding period Stress value at test temperature shall be considered while prolonged period with varying temperatures. some time we do big systems like fire water network (or other buried piping) to be kept at design pressure for 24 hours, where pressure/temperature monitored with continuous P/T recorders. B31.3 is has no such requirement, but in case of EN13480 it is held for 30min minimum at test pressure and bring back to design pressure for close visual inspection. However Pipelines (designed to ASME B31.4/31.8 etc.) may require longer periods fo...

The holding period depends on the time needed for inspecting the system thoroughly. Minimum is 10 minutes. Especially the gas tests calls for 100% weld and mechanical joints being examined. Also we have to ensure the limits of test pressure defined by individual components also to be taken care not to damage the components for eg. the soft seating or lining or to replace them with pipe spools. To my info the repeated call for Hydrostatic test on the same system, the pressure need not be changed from the code to its design pressure as most of the case if any major leaks are identified, the test is performed again at the same pressure and not to reduced pressure. It is independent of the holding time. Holding time risk are purely defined by inspecting time and the in-line components and not of the piping components. It is a usual practice to remove all in-line components which has reduced testing pressure conditions. The maximum test pressure is the pressure at which the pipe reach...