Materials & Welding

Dear Mr. Soman,   These products are to be tested for ~ 36000 PSI( is 2500 Bar).   We as a design service provider to many global and domestic enginnering houses has to provide information where these parts can get tested for approval.     Kindly let me have the information on where they can be tested and validated.     With kind regards,   A. Kiran Babu # +91 09342410446             On Mon, Mar 30, 2009 at 9:06 AM, < donboscomarine@vsnl.net > wrote: Dear Mr. Kiran Babu, The Pressure Vessels are to be tested to 31 KSI or 36 PSI ?  And do you require a NABL Certified Laboratory.  Please let us know. Best Regards, G. A. Soman PRINCIPAL ----- Original Message ----- From: KIRAN BABU AKSHINTHALA < kiranbabua@gmail.com > Date: Sunday, March 29, 2009 9:53 am Subject: [MW:1830] Hi Presuure Vessel Testing Facility- India To: materials-welding@googlegroups.com > Hi Team, > > We are looking for contact details of Lab Facilities who can test > thes...

If that is the case than why ASME permit a staggered weld between shell to stiffeners weld? As per my opinion we can do staggered weld for stiffeners fabrication b'cas same redial pressure load + Redial shear load (please refer UG-30(e))acting on stiffener weld.   Regards,     Devang Patel Manager Engineering   INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com ----- Original Message ----- From: Yagnesh Desai To: materials-welding@googlegroups.com Sent: Tuesday, March 31, 2009 9:42 AM Subject: [MW:1850] Re: 1841] Re: 1838] Fabricated Stiffeners Its so because the design is guided by buckling and not induced stress. ' src="cid:003b01c9b1bd$21f7c0f0$7900fea9@des6" width=16 border=0>"Somesh Kumar Pandey" < Somesh.Kumar@kbr.com > "Somesh Kumar Pande...

Its so because the design is guided by buckling and not induced stress. "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com> "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com> Sent by: materials-welding@googlegroups.com 03/30/2009 11:58 AM Please respond to materials-welding@googlegroups.com To <materials-welding@googlegroups.com> cc Subject [MW:1843] RE: 1841] Re: 1838] Fabricated Stiffeners Devang, As per ASME it is no where specified for external pressure design to use the staggered intermittent weld to fabricate the stiffeners. Hence, in my opinion it should not be used. You have to meet the required moment of inertia for the provided section. It is advisable to fabricate the stiffener with continuous welding only. Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Messag...

Dear all, The root pass is grinded to te half (aprx) before make the hot pass. the efectiva area is fullfilled with hot+filler passes, then the final strenght of joint doesn't depend on root pass. Regarding metallurgical issues I agree and give thanks to Mr. Babu for the explanation. One more factor is the operative difficult of make the root pass with 7010 or 8010. BR Date: Mon, 30 Mar 2009 22:19:46 +0800 Subject: [MW:1847] Re: Query on SMAW electrode selection for API 5L X65 From: kbabupsg@gmail.com To: materials-welding@googlegroups.com Hi,   The strength of joint not purely depend on the root pass.   My explanation as follows,    1) Main problem starts at Root  if you have the different metallurgical phases at the root, , say you have 50% ferrite and 50% pearlite, the properties of metallurgical phases are different. Obviously that would carry forward to mechanical properties too.   2) As we all ,know the corrosion starts, where ever ...

You can use fabricated stiffener with if it is considered fabricated stiffener in Design Calculation. You can do the staggered intermittent welding on bottom side of the Stiffener. Regards B.K.Shah On Mon, Mar 30, 2009 at 7:23 AM, Devang Patel < devangp@inoxindia.com > wrote: can we use fabricated stiffeners in external pressure design of shell of pressure vessel? If, yes than please tell, can we use staggered intermittent weld to fabricate T or Angle? Please reply. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.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 expre...

Hi,   The strength of joint not purely depend on the root pass.   My explanation as follows,    1) Main problem starts at Root  if you have the different metallurgical phases at the root, , say you have 50% ferrite and 50% pearlite, the properties of metallurgical phases are different. Obviously that would carry forward to mechanical properties too.   2) As we all ,know the corrosion starts, where ever you have two differrent phases or chemical composition ; So in order to avoid this variation , it is necessary to keep the dilution level to minimum in the root pass   3) It is well proved by the researchers that, dilution is more on the root pass.   4) The strength of weld, not purely depend on the Root passes.     Thanks & regards,     K.Babu Singapore     On Sun, Mar 22, 2009 at 9:43 PM, ARI < ariv2k@gmail.com > wrote: Hi,   Using E6010-G would keep the dilution level as minimum, but at the same time, it wouldn;t give the UTS equal to Parent meta...

Hi Devang, I don't think you can. In the fig UG-29.1 of ASME VIII-1, the term 'butt-welding' is used for stiffener to stiffener welding. Also, UG-29 (e) states that Any internal stays or supports used as stiffeners of the shell shall bear against the shell of the vessel through the medium of a substantially continuous ring. The word 'substantially continuous ring' is important here. Thanks Johnson Madukayil Mechanical Engineer CCI Thermal Technologies Inc. 2721, Plymouth Drive Oakville, ON L6H 5R5 Canada   On Mon, Mar 30, 2009 at 1:48 AM, Devang Patel < devangp@inoxindia.com > wrote: Thanks, Somesh, Yes, you are write but my question is can we do staggered intermittent weld to fabricate the stiffeners? ASME Sec. VIII Div-1 told about the stiffeners to shell welding only. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com ----...

Designated temperature normally is the Design Temperature or Desired Temperature. MAWP for practical purposes is synonymous with Design Pressure. But many a times MAWP>Design Pressure, especially when you use stronger or thicker than required material for fabricating the pressure vessel. MDMT is the lowest design temperature that the metal can be exposed to and not rupture under pressure (MDMT is important in cryogenic applications and in very cold places) On Mon, Mar 30, 2009 at 1:10 AM, Chandulal Vithlani < chandulal.vithlani@borouge.com > wrote: As per API 510, MAWP is defined as " The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind...

Hi all I have one problem, if anyone have a solution these plz. give. I want to weld a tobe of wall thk. 5 mm. I want to acheive a weld of 20 mm od pipe on its wall with a controlled distortion of 0.01 mm. Can anyone please tell m which welding process I adope to acheive this. Please tell. --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

Devang, As per ASME it is no where specified for external pressure design to use the staggered intermittent weld to fabricate the stiffeners. Hence, in my opinion it should not be used. You have to meet the required moment of inertia for the provided section. It is advisable to fabricate the stiffener with continuous welding only. Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Devang Patel Sent: March 30, 2009 1:48 PM To: materials-welding@googlegroups.com Subject: [MW:1841] Re: 1838] Fabricated Stiffeners Thanks, Somesh, Yes, you are write but my question is can we do staggered intermittent weld to fabricate the stiffeners? ASME Sec. VIII Div-1 told about the stiffeners to shell welding only. Regards, Devang Patel Manager Engineering INOX INDIA Lt...

Maximum Allowable Working Pressure (MAWP): It is the maximum permissible pressure at the top of the vessel in its normal operating position at a specific temperature, usually the design temperature (this is what the designated temp you are asking) When calculated, the MAWP should be stamped on the nameplate. The MAWP is the maximum pressure allowable in the “hot and corroded’ condition. It is the least of the values calculated for the MAWP of any of the essential parts of the vessel, and adjusted for any difference in static head that may exist between the part considered and the top of the vessel.   Design Pressure: The pressure used in the design of a vessel component for the most severe condition of coincident pressure and temperature expected in normal operation. For this condition, and test condition, the maximum difference in pressure between the inside and outside of a vessel, or between any two chambers of a combination unit, shall be considered. Any t...

Thanks, Somesh, Yes, you are write but my question is can we do staggered intermittent weld to fabricate the stiffeners? ASME Sec. VIII Div-1 told about the stiffeners to shell welding only. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com ----- Original Message ----- From: "Somesh Kumar Pandey" < Somesh.Kumar@kbr.com > To: < materials-welding@googlegroups.com > Sent: Monday, March 30, 2009 10:45 AM Subject: [MW:1840] RE: 1838] Fabricated Stiffeners Dear Devang, Fabricated stiffeners can be used in external pressure design of shell of pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig. UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on the acceptable method of attaching stiffener rings Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +6...

Dear Devang, Fabricated stiffeners can be used in external pressure design of shell of pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig. UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on the acceptable method of attaching stiffener rings Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Devang Patel Sent: March 30, 2009 12:24 PM To: materials-welding@googlegroups.com Subject: [MW:1838] Fabricated Stiffeners can we use fabricated stiffeners in external pressure design of shell of pressure vessel? If, yes than please tell, can we use staggered intermittent weld to fabricate T or Angle? Please reply. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398...

As per API 510, MAWP is defined as “ The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind, earthquake, etc.”.   What is the designated temperature?   How does MWAP differ from Design Pressure?   Similarly, MDMT has been defined in API 510 as “The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b)).”   What is the difference between MDMT and Design Temperature?     Regards   Chandulal S Vithlani   ********************************...

can we use fabricated stiffeners in external pressure design of shell of pressure vessel? If, yes than please tell, can we use staggered intermittent weld to fabricate T or Angle? Please reply. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.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,   Generally large size eccentric reducers had to be made from pipes containing seam (SAW STRT pipes) and/or plates. If the reducers are certified to material spec. SA234 WPBW then welds was 100% RT-ed, and additionaly if U has been specified then it was 100% UT-ed.   These fittings shall meet to dimensional standard ASME B 16.9.   Sometimes, based on the design requirement, MSS-SP-75 specification would be required, and fittings would need to be certified accordingly by the manufacturer.   Regards,   Ari   On 3/29/09, HAREESH K V < hareesh13h@gmail.com > wrote: Dear Sir, I need a help regarding the fabrication of Eccentric reducer. When we made this with a seamed pipe, on of the cut of the reducer come along with the seam of the pipe. Our client rejected this reducer due to this reason.(reducer comes in process piing) What is the procedure we have to do in this case(NDT methods, like that). Is there any clause in ASME B 31.3 for this? Is there any clause in ASME...

Dear Mr. Kiran Babu, The Pressure Vessels are to be tested to 31 KSI or 36 PSI ? And do you require a NABL Certified Laboratory. Please let us know. Best Regards, G. A. Soman PRINCIPAL ----- Original Message ----- From: KIRAN BABU AKSHINTHALA < kiranbabua@gmail.com > Date: Sunday, March 29, 2009 9:53 am Subject: [MW:1830] Hi Presuure Vessel Testing Facility- India To: materials-welding@googlegroups.com > Hi Team, > > We are looking for contact details of Lab Facilities who can test > thesepressure vessels to 36 KSI. > > With kind regards, > > A. Kiran Babu > Magna Design Technologies > #93424 10446 > > > > DON BOSCO MARITIME ACADEMY Premier Automobiles Road, Kurla West, Mumbai 400070 Tel: (022) 2504 1585 / 2018; 25036344. Fax: (022) 2504 0682 Email: donboscomarine@vsnl.net Website: www.dbma.in --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe f...

the best way is to manufacture a reducer is  in 2 halves formed from plate. These 2 nos long seams will be acceptable.you need to develop the plate profiles. Talk to any manufacturer of heat exchangers who did kettle type ones, in case you need some guidelines for the above development.. Tagore On Sun, Mar 29, 2009 at 11:18 AM, HAREESH K V < hareesh13h@gmail.com > wrote: Dear Sir, I need a help regarding the fabrication of Eccentric reducer. When we made this with a seamed pipe, on of the cut of the reducer come along with the seam of the pipe. Our client rejected this reducer due to this reason.(reducer comes in process piing) What is the procedure we have to do in this case(NDT methods, like that). Is there any clause in ASME B 31.3 for this? Is there any clause in ASME Sec VII? Can the cuts of the reducer be considered as a longitudinal joints? Thanking You Hareesh K V --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email...

Use ENERPAC high pressure hand pump. It will be economical and very effective. You do not need to get it done in a lab. http://www.hyjacks.net/ep_40,000%20psi%20Hand%20Pump.pdf Johnson Madukayil CCI Thermal Technologies Inc. Canada On Sat, Mar 28, 2009 at 3:59 AM, KIRAN BABU AKSHINTHALA < kiranbabua@gmail.com > wrote: Hi Team,   We are looking for contact details of Lab Facilities who can test these pressure vessels to 36 KSI.   With kind regards,   A. Kiran Babu Magna Design Technologies #93424 10446 --~--~---------~--~----~------------~-------~--~----~ 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. app...

Dear Sir, I need a help regarding the fabrication of Eccentric reducer. When we made this with a seamed pipe, on of the cut of the reducer come along with the seam of the pipe. Our client rejected this reducer due to this reason.(reducer comes in process piing) What is the procedure we have to do in this case(NDT methods, like that). Is there any clause in ASME B 31.3 for this? Is there any clause in ASME Sec VII? Can the cuts of the reducer be considered as a longitudinal joints? Thanking You Hareesh K V --~--~---------~--~----~------------~-------~--~----~ 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/co...

i think ,this chose is best because the service condition induceed the H embrittlement or cold crack even after days or months.therefore for reducing the probability of this crack ,the total strength of weld metal must be less than base metal and strain occur in weld not base. From: Ari <ariv2k@gmail.com> To: Materials & Welding <materials-welding@googlegroups.com> Cc: pssadanandan@yahoo.com Sent: Thursday, March 19, 2009 1:45:44 PM Subject: [MW:1784] Query on SMAW electrode selection for API 5L X65 Dear All, Can you please advise, why E6010-G (root) & E-7010-P1 (hot/fill) are used for Oil pipelines(Sour) containing parent material of API 5L X65.. Since these type of PQR/WPS are being approved by most of the Company. As, X65 has an YS of 65,000 Psi, whilst the electrodes used E6010 has YS of  48,000 Psi, and E-7010-P1 has YS of 60,000 psi. By using both of these electrodes the weld metal strength would not exceed  YS 60,000 psi. How its acceptable...

Respected All, my question is  can we do painting of welded joints of pipe before hydrotest? As per B31.3  2006 clause 345.3.1 we can do '' but'' our applicable code is B31.8, Can we do with the same? Regards, m javed --~--~---------~--~----~------------~-------~--~----~ 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 also encountered the same problem in Duplex but we concluded that it is due high ferrite content in the weld during weld.We send the sample in the lab for analysis and we found that there is a variation in the ferrite content in the two area and due to which we could find the line only in that area.   regds   Nilesh On Sat, Mar 28, 2009 at 8:51 AM, ARI < ariv2k@gmail.com > wrote: Hi,   By using Type-I films, which has slow speed, very high contrast, & very fine grain, using films Kodak M, TMX, T, Agfa D2, D4, Fuji 50, you may try!!!   Regards, Ari     On 3/27/09, ndion@acuren.com < ndion@acuren.com > wrote: You should do UT to confirm the indication Sent from my Verizon Wireless BlackBerry From : ndion@Acuren.com Date : Fri, 27 Mar 2009 10:57:22 +0000 To : < materials-welding@googlegroups.com > Subject : [MW:1822] Re: 1814] Re: RT of Duplex Stainless Steel There are only three things that will cause white ...

Hi Team,   We are looking for contact details of Lab Facilities who can test these pressure vessels to 36 KSI.   With kind regards,   A. Kiran Babu Magna Design Technologies #93424 10446 --~--~---------~--~----~------------~-------~--~----~ 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, Thanks for the good discussion we had in below mails from J and Sayee. I would just like to add the following from my experience. When we discuss the Code, we have to judiciously follow the provisions/limitiations therein. The explanation by J is the most appropriate so far as the ASME is concerned. In case, the lower preheat temperature are required to be used, the new qualification may be executed. That is the only way. This doesnot mean that if we do not follow, there would be really some problem of the sort we discussed in below mail. It is something like this. When you are going on a highway, you have to follow the maximum speed limit specified for the same even though by exceeding the limit. This may be due to a no. of reasons, as we all know. Similarly, when we need to follow certain standard, specification, code, etc. we may have to make the best use of the provisions for our situation before qualification of procedures and use the worst situation in qualification so...