Materials & Welding

Dear Mr. Maran, With reference to the clause no. 341.4.2 of ASME B31.3 only visual Exam. is required. Please refer Para 341.3.2 for accept. criteria. Thanks & regards, C. R. GANDHI From: Elamaran Rajan <elams.rajan@gmail.com> To: materials-welding <materials-welding@googlegroups.com> Sent: Friday, March 28, 2014 5:57 PM Subject: [MW:20425] RT requirement for cat D fluids Dear Experts What is the Radiography requirement for category D fluids with reference to B31.3 Regards -- maran -- 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://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take ...

Heat input max.is 1.5 On Mar 30, 2014 4:00 AM, "Kostas Migiakis" < kmigiakis@gmail.com > wrote: 100% Ar may be the reason of having high ferrite content on your welds. You need to add a γ-stabilizer element (such as Nitrogen) in your weld pool if you want to increase austenite amount in the microstructure.  Ar+2N is common for this welds. There are cases where Ar+5N has been used (but in these cases there is danger of porosity) By the other hand did you do strict control on Heat Input? What was the value of HI? Best Regards Dr. Kostas Migiakis Materials & Welding 29 Μαρ 2014, 14:45, ο/η Hrushikesh Sangamnerkar < hrushi612@gmail.com > έγραψε: Pure Argon is to be used for this material. We had asked for Ar+2%N mixture but customer had rejected. On Mar 29, 2014 5:27 PM, "Kostas Migiakis" < kmigiakis@gmail.com > wrote: Dear  Hrushikesh What type of gas mixture did you use for the specific welds? Best Regards Dr. Kostas Migiakis Mat...

The bends which are made with a pipe bending machine have to be to a much bigger radius of bend compared with an induction bend, which will be, for example 5D. Hence induction bends and site bends are used for very different purposes. If the design calls for an induction bend then that is what is required for geometry reasons. Normally induction bends are supplied with tangential ends and you weld to the tangential end, which is more round than the bent section. If you cut an induction bend you will find that it is more likely to be oval in cross-section. As a result welding fit-up can be bad and weld root defects can result. If good fit-up was achieved and the radiographs show no defects then I consider there is little basis for rejection, even if not exactly conventional.   Regards   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Saidur Rahman Sent: 29 March 2014 15:15 To: materials-welding@googlegroups.com Subject: [MW:...

100% Ar may be the reason of having high ferrite content on your welds. You need to add a γ-stabilizer element (such as Nitrogen) in your weld pool if you want to increase austenite amount in the microstructure.  Ar+2N is common for this welds. There are cases where Ar+5N has been used (but in these cases there is danger of porosity) By the other hand did you do strict control on Heat Input? What was the value of HI? Best Regards Dr. Kostas Migiakis Materials & Welding 29 Μαρ 2014, 14:45, ο/η Hrushikesh Sangamnerkar < hrushi612@gmail.com > έγραψε: Pure Argon is to be used for this material. We had asked for Ar+2%N mixture but customer had rejected. On Mar 29, 2014 5:27 PM, "Kostas Migiakis" < kmigiakis@gmail.com > wrote: Dear  Hrushikesh What type of gas mixture did you use for the specific welds? Best Regards Dr. Kostas Migiakis Materials & Welding 28 Μαρ 2014, 18:22, ο/η Hrushikesh Sangamnerkar < hrushi612@gmail.com > έγραψε: Hi all, Base M...

Dear Experts, I am now working on a Ø30" cross-country pipeline project. At my project one AP(Angle Point) needed 12° Bend. so the fitter cut 22.5° induction bend in the middle & make it 11.25° & used it. I think that it is not acceptable. they should use pipe bending machine. Experts comments needed & also applicable codes & standards regarding  field pipe bending. Regards, Md. Saidur Rahman QA/QC GTCL -- 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://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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 docume...

Pure Argon is to be used for this material. We had asked for Ar+2%N mixture but customer had rejected. On Mar 29, 2014 5:27 PM, "Kostas Migiakis" < kmigiakis@gmail.com > wrote: Dear  Hrushikesh What type of gas mixture did you use for the specific welds? Best Regards Dr. Kostas Migiakis Materials & Welding 28 Μαρ 2014, 18:22, ο/η Hrushikesh Sangamnerkar < hrushi612@gmail.com > έγραψε: Hi all, Base Metal: SUS 329J4L Filler Metal: WEL TIG 329J4LT Process: GTAW Ferrite required (%Fe): 30-55% Presently the ferrite obtained is on higher side. %Fe=60-65. Wanted good welding practice if any one worked with this material. Kindly help with some literature for the same. -- Hrushikesh H Sangamnerkar 09724738118 -- 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://material...

Dear  Hrushikesh What type of gas mixture did you use for the specific welds? Best Regards Dr. Kostas Migiakis Materials & Welding 28 Μαρ 2014, 18:22, ο/η Hrushikesh Sangamnerkar < hrushi612@gmail.com > έγραψε: Hi all, Base Metal: SUS 329J4L Filler Metal: WEL TIG 329J4LT Process: GTAW Ferrite required (%Fe): 30-55% Presently the ferrite obtained is on higher side. %Fe=60-65. Wanted good welding practice if any one worked with this material. Kindly help with some literature for the same. -- Hrushikesh H Sangamnerkar 09724738118 -- 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://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   The views expressed/exchnaged in this group are members personel vie...