Materials & Welding

Hi everyone¡¡¡   We are tendering for a 24" Ø and 4" Ø piggy-back  pipeline project.   I'm looking for a operational procedure or technique to install the pipelines. I know that the 4" Ø piggy-back pipeline is holded on the 24" Ø carrier pipeline, but how to weld the 4" Ø field joints and put it onto the 24" Ø pipeline inside the ramp of the barge?   Thanks for your time and help. Eduardo Calva

Dear experts,    can u help me? what is the size  for  bend  test specimen for  plate ? -- 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.

Rgds raj                                                                                                                                                                    ...

Hi gents,   Can someone drop me some information (article) about delayed cracks (post heat cracks) and which group materials are prone to it and why?   Many thanks, Elshan.

Unlisted   On Mon, May 30, 2011 at 8:19 PM, bhaskar rao < pbrao1968@gmail.com > wrote: Dear Experts,   Please give me the answer regarding P No.   What is P No. of   AISI-4130 Material .   Thankyou & Best Regards,     PBRAO. -- 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. -- Thanks & regards, K.Babu -- 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.co...

Hi, Apart from all these, arc blow can be avoided , from changing  DC to AC , if AC is OK for your job. N. Kumar --- On Mon, 30/5/11, nayak singh <nayak_tp@yahoo.com> wrote: From: nayak singh <nayak_tp@yahoo.com> Subject: Re: [MW:11216] ARC Blow To: materials-welding@googlegroups.com Date: Monday, 30 May, 2011, 3:40 PM unwanted deflection of welding arc from inteded path. Arc blow comes severe when welding is carried out in confined spaces and corners on heavy metal plate using a dc power source. Remedies. 1.electrod geometry in non consumable electrod. 2.changing the position of earth clamp. 3.'avoiding the presence of maganite material around  wp 4. Put earth clamp away from joint weld 5. Preheating the parts befor welding On Mon May 30th, 2011 5:25 AM EDT we1414 wrote: >Dear experts Hello to all of you as i m new to this group. >my query is about arc blow. pleas explain why it occurs during welding >and how can it be controlled. > >-- >To pos...

hi, it will be straight under lower mag and same will be in zig-zag/tapered in both direction under high mag. each zig-zag point connects to make a straight line(H .mag). under low mag u can see zig-zag only if the residual/ service stress is high enough to reveal it and it will be not straight at normal mag. On Sun, May 29, 2011 at 2:24 PM, sajidalam mohd. < engineer_makes_world@yahoo.co.in > wrote: DEAR EXPERTS                      GOOD DAY CAN ANY ONE EXPLAIN HOWS CRACKS IN WELD ON X-RAY FILMS LOOKS?   IT LOOK LIKE ZIZ ZAG??? ITS LOOKS LIKE THIN/NARROW STRAIGHT LINE???   BECAUSE I AM  CONFUSED ABOUT INDICATION OF CRACKS OF WELDING ON X-RAY FILM?     WAITING FOR REPLY.   REGARDS MOHAMMAD SAZID ALAM INSPECTION ENGINEER AICO-DAMMAM MOBILE:-0534077860 -- 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'...

Hello MPK, Please see the attached document ,which gives a broad overview of sour services both as per MR-0175(upstream) and MR-0103(downstream).Feel free ask more questions if you wish. Note:-to understand  sour services one does not have to be a NACE Corrosion specialist. A person with good common sense and engineering background would be able to comprehend the requirements after reading through the above documents. Regarding " What is reduction temperature for LTCS" if you provide the details about the problem, I would be able to guide you. Thanks and best regards.  Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist & Consultant Ontario,Canada. Email-pgoswami@sympatico.ca, pgoswami@quickclic.net -----Original Message----- From: materials-welding@googlegroups.com [ mailto:materials-welding@googlegroups.com ] On Behalf Of Kannan Sent: Wednesday, May 25, 2011 12:26 PM To: Materials & Welding Subject: [MW:11149] Re: Reduction temperature for...

Hi, Please see attached. On Mon, 30 May 2011 17:32:25 +0530 Suresh <bobsuresh24@gmail.com> wrote > Cracks always looks like Sharp and strightline not in ZIG ZAG..unless untill stress are  involved . > > On Sun, May 29, 2011 at 8:24 AM, sajidalam mohd. < engineer_makes_world@yahoo.co.in > wrote: > DEAR EXPERTS                      GOOD DAY CAN ANY ONE EXPLAIN HOWS CRACKS IN WELD ON X-RAY FILMS LOOKS?   IT LOOK LIKE ZIZ ZAG??? ITS LOOKS LIKE THIN/NARROW STRAIGHT LINE???   BECAUSE I AM  CONFUSED ABOUT INDICATION OF CRACKS OF WELDING ON X-RAY FILM?     WAITING FOR REPLY.   REGARDS MOHAMMAD SAZID ALAM INSPECTION ENGINEER AICO-DAMMAM MOBILE:-0534077860 -- > To post to this group, send email to materials-welding@googlegroups.com >To unsubscribe from this group, send email to materials-welding+unsubscribe@goog...

asme equivalent p.no is 4 comes in 1 Cr- 0.5 Mo steels. like sa387 gr11 2011/5/30 bhaskar rao < pbrao1968@gmail.com > Dear Experts,   Please give me the answer regarding P No.   What is P No. of   AISI-4130 Material .   Thankyou & Best Regards,     PBRAO. -- 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. -- regards, Harish. -- 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://mater...

unwanted deflection of welding arc from inteded path. Arc blow comes severe when welding is carried out in confined spaces and corners on heavy metal plate using a dc power source. Remedies. 1.electrod geometry in non consumable electrod. 2.changing the position of earth clamp. 3.'avoiding the presence of maganite material around wp 4. Put earth clamp away from joint weld 5. Preheating the parts befor welding On Mon May 30th, 2011 5:25 AM EDT we1414 wrote: >Dear experts Hello to all of you as i m new to this group. >my query is about arc blow. pleas explain why it occurs during welding >and how can it be controlled. > >-- >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 ...

Dear Mr Azmi,       Please see UG-16 c) Mill Undertolerance for plates of ASME Sec VIII Div. I.   This allows 0.25 mm less thickness; addition to this please refer Corrosion allowance.   Regards,   Vikas. On Fri, May 27, 2011 at 2:14 PM, asad azmi < azmiasadayub@gmail.com > wrote: Dear All,   Greetings.   Pittings (not more than 0.5 mm in depth) observed on the surface of a shell of a Vessel. pls find photos for your reference.   Shell material  is SA 36. thickness 8mm. service fluid - water   Code of construction is ASME SEC VIII DIV1   After grindings also pittings can be observed on the large surface of the shell.   Whether these pittings can be accepted as it is OR further grinding is required.   Please Suggest.   Thanks and Regards   Asad Azmi -- 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...

Hi.. Crack will appear as narrow very sharp straight , curved, star type in film -- 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 Experts,   Please give me the answer regarding P No.   What is P No. of   AISI-4130 Material .   Thankyou & Best Regards,     PBRAO. -- 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.

Limesh, The welder can be renovated perfectly by the suggested method, see QW-320. Regards     De: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] En nombre de jaya anil Enviado el: lunes, 30 de mayo de 2011 7:32 Para: materials-welding@googlegroups.com Asunto: Re: [MW:11208] Renewal of Welder Qualification   Dear Limesh,   Just see clause 452.3 in ASME Sec.IX, there are Diameter restrictions, you have qualified your welder in 1 1/2 " Pipe means he falls in 1"(25mm) to 2 7/8"(73mm) restriction, which says Welder can weld from 1" to unlimited, but now for his renewal you are supporting 8" pipe, So asthetically it is not possible, he may fall in over 2 7/8" ( ie 73mm to unlimited), So better to show RTs of 1 1/2" or less than 2 7/8" Pipe . So that he can regain his qualification subject to his contuity record. On Sat, May 28, 2011 at 6:29 PM, limesh M < limesh78...

In general The shifting of the arc in various directions in electric-arc welding due to the magnetic fields at the arc. OR A welding arc may be deflected away from the point of welding, which can mean that the weld quality may suffer. Such arc deflection, usually forward or backward of the welding direction, is known as 'arc blow'.   Arc blow tends to occur if the material being welded has residual magnetism at a certain level, particularly when the weld root is being made. This is due to interaction between the directional magnetic field of the welding arc and the directional field of the residual magnetism.   Remedies for Arc Blow - Arc blow can be minimized by keeping the following factors in view: 1. Electrode geometry in non consumable electrode welding (e.g., TIG and carbon arc welding). 2. Changing the position of earth clamp or current return lead and welding away from the earth connection. 3. Avoiding the presence of (or rearranging) magnetic mate...

You can use Duplex 2209 AC-DC it is specially formulated for welding Type 2205 combining with high strength with improved pitting & SCC resistance. Smooth running arc gives you uniform bead.     Cheers!!!! J   Regards, Prakash Verma Aker Drilling Risers Aker Solutions MOBILE - 0047-40466591 DESK- 0047-22945932 Email: Prakash.Verma@akersolutions.com From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of fredric prabu Sent: 30. mai 2011 07:21 To: materials-welding@googlegroups.com Subject: [MW:11202] Welding consumable for CD3Mn   Dear experts   Can some body suggest suitable welding consumable for welding casting grade CD3Mn , UNS J92205 in SMAW process.   Thanks   Regards Fredric prabu This e-mail and any attachment are confidential and may be privileged or otherwise protected from disclosure. It is solely intended for the person(s)...

Dear All, Can anybody tell me in detail the required hydrotest pressure as per ASME Section II A Code at the Pipe manufacturers end for material SA 312 TP 304. I have already read the SA 999 clause no. 22.2 Hydrostatic test, after reading also i have not cleared that what is the code requirement. Regards, Kapil Bhamburdekar -- 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 Limesh,   Just see clause 452.3 in ASME Sec.IX, there are Diameter restrictions, you have qualified your welder in 1 1/2 " Pipe means he falls in 1"(25mm) to 2 7/8"(73mm) restriction, which says Welder can weld from 1" to unlimited, but now for his renewal you are supporting 8" pipe, So asthetically it is not possible, he may fall in over 2 7/8" ( ie 73mm to unlimited), So better to show RTs of 1 1/2" or less than 2 7/8" Pipe . So that he can regain his qualification subject to his contuity record. On Sat, May 28, 2011 at 6:29 PM, limesh M < limesh78@gmail.com > wrote: Dear All, Welder Qualification Code: ASME BPV SEC IX I have a qualified welder with following diameter range. 1.1/2'' and above Now his qualification is going to expire and I would like to renew it by showing supporting radiography reports. Is it possible to renew the above qualification by showing the radiography report of an 8" diameter p...

Hi,   E6010 : This basic, all-purpose electrode was developed for pipe welding. It has a high cellulose sodium coating and can be operated in all positions. The E6010 works well on dirty, rusted or greasy metals and small-diameter pipes.    Regards, Prakash Verma Aker Drilling Risers Aker Solutions MOBILE - 0047-40466591 DESK- 0047-22945932 Email: Prakash.Verma@akersolutions.com From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of gohil tushar mansukhlal Sent: 30. mai 2011 09:12 To: materials-welding@googlegroups.com Subject: Re: [MW:11203] Root Pass Welding   Dear Friend E6010 is Sellulosic coated electrode which is having high penetrating power so it is used for root welding. On Mon, 30 May 2011 12:17:11 +0530 wrote >Dear Experts, Can you pl share why E 6010 electrode used in Root pass welding ? Best Regards,Deva -- > To post to this group, send email...

Dear experts Hello to all of you as i m new to this group. my query is about arc blow. pleas explain why it occurs during welding and how can it be controlled. -- 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.

apply a surface layer on cast iron side with ENi-1 electrode ample enough to compensate dilution effects then weld it with any suitable welding electrode compatible with your carbon steel grade. On May 29, 4:29 pm, Ahmed Eissa < ahmedeiss...@yahoo.com > wrote: > dear experts >   > does any one has welded carbon steel to cast iron before? > what filler metal to use? > what precausions should be taken? >   > any valuable data will be appreciated. -- 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 experts,   good mornning,   Can any body explain for crater distance as per ASME B 31.3 (Layer & near the pass )   Thank you   MPK... -- 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 Friend E6010 is Sellulosic coated electrode which is having high penetrating power so it is used for root welding. On Mon, 30 May 2011 12:17:11 +0530 wrote >Dear Experts, Can you pl share why E 6010 electrode used in Root pass welding ? Best Regards,Deva -- > 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. > Thanks with Regards From TUSHAR GOHIL Mobile No: 9510918745 & 7204626800 Treat yourself at a restaurant, spa, resort and much more with Rediff Deal ho jaye! -- To post to this group, send email to materials-welding@google...

Dear experts   Can some body suggest suitable welding consumable for welding casting grade CD3Mn , UNS J92205 in SMAW process.   Thanks   Regards Fredric prabu

As this vessel is low pressure water service, you could do buttering onto the shell pitting areas by using qualified WPS & welder. Make smooth grinding and MPI before buttering and do MPI after buttering. (Of course, ASME SEC VIII DIV1 requirement to be checked and derogate as required)     Rgds,   WN From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ahmed Eissa Sent: Saturday, May 28, 2011 10:36 PM To: materials-welding@googlegroups.com Subject: Re: [MW:11177] pittings on surface of Shell   please refer to API 510 (corrosion and minimum thickness evaluation) clause , since you have corrosion allawance 3mm, thus you do not to fear, but we have smillar case in our plant so we applied internal coat (joutn marthon) as this coat is hard and applied to splash zone in offshore rig, and we inspect it after one year the condition of paint was excellent and no pitting was...

It has good penetration. Best regards, Syed Waheedullah Shah Unit Manager Inspection Pakarab Fertilizers Multan Tel. Office: +92-61-90613098 Mob.: +92-333-3829925             +92-300-2221535   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Viji M Sent: Sunday, May 29, 2011 10:14 AM To: materials-welding@googlegroups.com Subject: [MW:11185] Root Pass Welding   Dear Experts,   Can you pl share why E 6010 electrode used in Root pass welding ?   Best Regards, Deva -- 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 deep and better penetration as backside gouging/welding is not possible Regards Ajay Goel   Date: Sun, 29 May 2011 09:14:22 +0400 Subject: [MW:11185] Root Pass Welding From: devashri07@gmail.com To: materials-welding@googlegroups.com Dear Experts, Can you pl share why E 6010 electrode used in Root pass welding ? Best Regards, Deva -- 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.

Who said ...? These electrodes can also root filler and caping, mostly used for welding pipe line or (welding down) ASME XI IS THAT I KNOW   RGDS IBNU   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Viji M Sent: 29 Mei 2011 12:14 To: materials-welding@googlegroups.com Subject: [MW:11185] Root Pass Welding   Dear Experts,   Can you pl share why E 6010 electrode used in Root pass welding ?   Best Regards, Deva -- 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 docu...

Dear Hafiz,   Steam blowing will be done generally to clean the steam piping before put the steam piping into service this will remove all loose mill scale, rust and foreign materials from piping. If left uncleaned, these particles will reach steam turbine blades through piping and damage them. Used for steam piping and steam circuits of boilers - power plants   Nitrogen purging is charging the piping with nitrogen gas before charging the line with hydro carbons/chemicals to make them inert (to displace the atmospheric air which contains oxgen) to avoid any explosion/chemical reaction. Used for hydrocarbon piping, pressure vessels, equipment etc. - oil and gas Regards, T.V.Ramakrishna. On Sun, May 29, 2011 at 3:33 PM, Hafiz Ali Alvi < alimalvi300@hotmail.com > wrote: Hello All,   My question is about difference between Blowing (e.g Steam Blowing) and Purging (e.g Nitrogen Purging). What is the main difference between these two operations and for what service we use ...

Because It has a very good metal penetration with a low electric amperage. Regards, jml, Colombia South America 2011/5/29 Viji M < devashri07@gmail.com > Dear Experts, Can you pl share why E 6010 electrode used in Root pass welding ? Best Regards, Deva -- 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. -- 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 view...

Moisture is problem for defects and it shall be less than 5PPM is always give better result as u mentioned gas flow rate is too high, pl check again and recommend On Wed, May 25, 2011 at 6:36 PM, kalyan vvv < vvvkalli@gmail.com > wrote: Hi mustaffi,   It is better to use 99.998% purity of ultra pure argon as a purging & shielding gas.It gives sound quality of welding and better results. In this other components are                                          oxygen   -- < 4.00PPM                                          Moisture -- < 4.00PPM                                          THC       --  < 0.5PPM Oxygen & moisture percentage is more than 0.4PPM it may leads to corrosion ,contamination &  porosity. Maintain gas flow rate between 25 to 40PPM.   -- THANKS & REGARDS   KALYAN VVV WELDING ENGINEER THYSSEN KRUPP INDUSTRIES (INDIA) LTD HYDERABAD Mob.NO- 09885273257 -- To post to this group, send email to materials-welding@googlegroups.c...

http://www.ndt-ed.org/EducationResources/CommunityCollege/Radiography/TechCalibrations/RadiographInterp.htm check theabove link On Sun, May 29, 2011 at 9:54 AM, sajidalam mohd. < engineer_makes_world@yahoo.co.in > wrote: DEAR EXPERTS                      GOOD DAY CAN ANY ONE EXPLAIN HOWS CRACKS IN WELD ON X-RAY FILMS LOOKS?   IT LOOK LIKE ZIZ ZAG??? ITS LOOKS LIKE THIN/NARROW STRAIGHT LINE???   BECAUSE I AM  CONFUSED ABOUT INDICATION OF CRACKS OF WELDING ON X-RAY FILM?     WAITING FOR REPLY.   REGARDS MOHAMMAD SAZID ALAM INSPECTION ENGINEER AICO-DAMMAM MOBILE:-0534077860 -- 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 thei...