Materials & Welding

It is not a matter of shielding gas. Try to keep the arc shorter (lower volts) and remove the torch very slowly Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Sankaran Sp [subasankaran@yahoo.co.in]   Sent: 31/08/2012 18:03 ZE8   To: materials-welding@googlegroups.com   Subject: [MW:15173] Defects in the MIG welding of F91+F91 -reg Dear friends, I am working the leading valve manufacturing company in Coimbatore ( INDIA) i ma facing quality issue in the MIG welding of Er 90S-B9. We have product in ASTM A182- F91 forged steel valve ( Equivalent to C12A casting or P91 pipes),during welding of body+Bonnet we are facing the crack in the crater area. Our welding parameters are as below: Joint type = Circumferential Fillet welding, Current = 215 - 235  Amps, V = 25 - 27 Volts, Shielding Gas = Ar+CO2 ( 80+20 % mixture), Gas flow = 20 - 25 LPM, Pre heat temp =  210 - 230 Deg C, Int...

Good morning sir, Requested to send mail in advance at least week time . I am interested for the same. Regards, RK Vichare (M)9869679123   ----- Original Message ----- From: Mistry K.U (Mumbai - Construction) To: materials-welding@googlegroups.com Sent: Fri, 31 Aug 2012 14:26:23 +0530 (IST) Subject: RE: [MW:15172] Invitation to IIW Monthly Technical Lecture_31st Aug 2012 @ Mumbai, India Too late info  - please arrange such info in little advance please.   K. U. Mistry Manager QA/QC Tecnimont ICB Pvt Ltd LLDPE/HDPE (SWING) Project OPAL Dahej Off Shore Project Site Gujarat   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of prem nautiyal Sent: 31 August 2012 11:48 To: materials-welding@googlegroups.com Subject: [MW:15170] Invitation to IIW Monthly Technical Lecture_31st Aug 2012 @ Mumbai, India           Dear All, Indian Institute of Welding, Mumbai branch cordially invites you for a technical...

Is there any program in gulf? Please update. Regards, Syed Mazhar Ali From: prem nautiyal <prem_nautiyal26@yahoo.com> To: materials-welding@googlegroups.com Sent: Thursday, 30 August 2012, 20:11 Subject: [MW:15170] Invitation to IIW Monthly Technical Lecture_31st Aug 2012 @ Mumbai, India Dear All, Indian Institute of Welding, Mumbai branch cordially invites you for a technical lecture on " Welding Requirements for Offshore Oil & Gas Projects" By Mr. Maruti Kumar, AEE(E) / Mr. D. Badole, CE(M) / Mr Pradeep N. Nair, CE(E) From : QA & Vendor Cell, Offshore Engineering Services, ONGC, Mumbai, India. On Friday, 31-08-2012 at 6.15 pm At Avion Hotel, Domestic Airport, Nehru Road, Vile Parle (East), Mumbai - 400 057, India. Mumbai Branch Tel No : (022) 25772637 Tel: (022) 25772637 Refer attached file for more details. Regards,   Prem Nautiyal The Indian Institute Of Welding Mumbai Branch Cell: 9769316...

Dear friends, I am working the leading valve manufacturing company in Coimbatore ( INDIA) i ma facing quality issue in the MIG welding of Er 90S-B9. We have product in ASTM A182- F91 forged steel valve ( Equivalent to C12A casting or P91 pipes),during welding of body+Bonnet we are facing the crack in the crater area. Our welding parameters are as below: Joint type = Circumferential Fillet welding, Current = 215 - 235  Amps, V = 25 - 27 Volts, Shielding Gas = Ar+CO2 ( 80+20 % mixture), Gas flow = 20 - 25 LPM, Pre heat temp =  210 - 230 Deg C, Inter pass temp= 320 - 380 Deg C >After welding ,the joint was inspected by M.P test andcrack found on crater area. > Removed the welding by turning, then re- test carried out with increased the post flow timings of shielding gas, but no improvement in the test, same crack appeared on crater area. What will be the reason for this defect? Can you suggest me suitable method to over come this problem? What will be the reason for this ...

Too late info  - please arrange such info in little advance please.   K. U. Mistry Manager QA/QC Tecnimont ICB Pvt Ltd LLDPE/HDPE (SWING) Project OPAL Dahej Off Shore Project Site Gujarat   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of prem nautiyal Sent: 31 August 2012 11:48 To: materials-welding@googlegroups.com Subject: [MW:15170] Invitation to IIW Monthly Technical Lecture_31st Aug 2012 @ Mumbai, India           Dear All, Indian Institute of Welding, Mumbai branch cordially invites you for a technical lecture on “ Welding Requirements for Offshore Oil & Gas Projects” By Mr. Maruti Kumar, AEE(E) / Mr. D. Badole, CE(M) / Mr Pradeep N. Nair, CE(E) From : QA & Vendor Cell, Offshore Engineering Services, ONGC, Mumbai, India. On Friday, 31-08-2012 at 6.15 pm At Avion Hotel, Domestic Airpo...

Mr. Jubir   Whether PMI was done before PWHT or after PWHT?   If results are from before PWHT, then there is something wrong in fillter metal, might be wrong fillter used.   If PMI done after PWHT, then you can weld sample joints again, and do PMI before and after PWHT and analyse the results.   Alternatively, you can try with other PMI isntruments, even you can go for Lab chemical analysis of few joints to ascertain some conclusion.   Thanks   Murugesan On Fri, Aug 31, 2012 at 12:19 AM, c sridhar < sridhar305@yahoo.com > wrote:   Mr. Jubir, Noted the points mentioned by you.  If the filler materials were pre checked and found to be OK for its chemistry, then there can not be any reason for such a drastic change in  the post weld chemistry, i.e., from 9% to 4%. The pre, inter pass, post heat or PWHT  temp. as mentioned by you are all within the stipulated range and can not be a reason either. All the 800 joints can not go wrong at a...

Dear All, Indian Institute of Welding, Mumbai branch cordially invites you for a technical lecture on " Welding Requirements for Offshore Oil & Gas Projects" By Mr. Maruti Kumar, AEE(E) / Mr. D. Badole, CE(M) / Mr Pradeep N. Nair, CE(E) From : QA & Vendor Cell, Offshore Engineering Services, ONGC, Mumbai, India. On Friday, 31-08-2012 at 6.15 pm At Avion Hotel, Domestic Airport, Nehru Road, Vile Parle (East), Mumbai - 400 057, India. Mumbai Branch Tel No : (022) 25772637 Tel: (022) 25772637 Refer attached file for more details. Regards,   Prem Nautiyal The Indian Institute Of Welding Mumbai Branch Cell: 9769316004 www.iiwindia.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/ http...

  Mr. Jubir, Noted the points mentioned by you.  If the filler materials were pre checked and found to be OK for its chemistry, then there can not be any reason for such a drastic change in  the post weld chemistry, i.e., from 9% to 4%. The pre, inter pass, post heat or PWHT  temp. as mentioned by you are all within the stipulated range and can not be a reason either. All the 800 joints can not go wrong at a time unless something happened drastically. Have a random check (date wise fabrication) again and find  if  the Cr. deficiency  is same with all the joints. It may give an insight and may lead  to a conclusion. regards, Sridhar. From: mohamed jubair <kmd.jubair@gmail.com> To: materials-welding@googlegroups.com Sent: Thursday, 30 August 2012 1:49 PM Subject: Re: [MW:15164] Problem about Positive material Identification(PMI) Dear Mr. Sridhar Thanks for your suggestion. Please understand my point. The filler wire read...

I request all our group members not to mention any consumable manufacturer's trade name in their queries. This forum has to be STRICTLY used for exchange of technical information related to Welding, materials & NDT and not make a mockery of any company or do sales publicity across the globe for others. It takes years of hard work to earn reputation in the market and few seconds to lose the same. We are not here to cause harm to the reputation of any local Indian company and publicise international brands.   I hope you guys will cooperate and make the best use of this forum in a professional manner.     Regards   Prem Nautiyal Cell: 9769316004 The Indian Institute Of Welding Mumbai, India --- On Wed, 8/29/12, Shankar gmail <shankarn6@gmail.com> wrote: From: Shankar gmail <shankarn6@gmail.com> Subject: Re: [MW:15151] RE: 15142] Problem about Positive material Identification(PMI) To: materials-welding@googlegr...