Materials & Welding

Dear Friends   I have recently heard that AWS has suspended CSWIP 3.1 to AWS CWI Bridging exam. Is this true ?? When this has happened ?? I am surprised about this news !   Regards   Prem Nautiyal -- 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 Asad Azmi, What was the method used for preheating? The soot formation as seen on the photos attached should not have any adverse effect on the material, however you will need to clean it before further processing. Regards George V Aliyattukudy vijigeorge@dugas.ae P Please consider the environment before printing this e-mail.   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of asad azmi Sent: 27 February 2012 17:59 To: materials-welding@googlegroups.com Subject: [MW:13789] effect of SOOT formation on base material   Dear All,   Greetings.   During preheating of a weld joint  SOOT( Black spots) was observed on the base material ( SA 516 GR 70- 50 Thk). Please refer attached photo.   Please explain is there any  adverse effect on base material becuase  of the SOOT formation.   Thanks & Regards   Asad Azmi -- To p...

Hi. IN API 570 RECOMENDED 2 LAYER MINIMUN, IN MY EXPERIENCE IQUAL OR MAJOR TO NOMINAL THICKNESS OF HEATHER.   AGUSTIN De: km hanif <hanif978@gmail.com> Para: materials-welding@googlegroups.com Enviado: Sábado, febrero 25, 2012 9:22 A.M. Asunto: [MW:13784] Weld-O-Let fillet size Dear Experts, I need your help for the attached subject   We are fabricating some well manifolds as per B31.3, Material ASTM A106. Gr B. header size 4" sch 40 (6.02mm thk) branch connections with 2" sch 80 weld-o-let. How we can calculate the required fillet size and it is required to cover all portion (which area tacking with bore pipe)   Kindly help me,, Thanks & Regards    Hanifa K. -- 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 express...

Dear C.R.Gandhi, For 1) 2.95 mm. for TIG and 6.6 mm. for SMAW. and All Size for Fillets. 2) i am not sure but as per my understand QW-202.4 is for Dissimilar Base metal Thickness But, you have PQR for 6 mm(there is no dissimilar thickness). Regards, Chirag Patel. Welding Engineer. The Anup Engg. LTD. On Tue, Feb 28, 2012 at 5:39 PM, CHINTUKUMAR GANDHI < cgandhi1975@yahoo.com > wrote: Dear Experts,   Good day to all. I have 2 cases which are to be shared with you for my knowledge.   (1) I have qualified a WPS of 8.5 mm. Base metal Thk. of P-1 G-1 to G-2. Root Run TIG and subsequent SMAW. TIG weld deposit thk. 2.5 mm. and SMAW weld deposit thk. 6 mm. PWHT- Normalizing and Tempering with Impact test at MDMT (-45º C.)   As per my opinion, as per QW-403.6- Minm. T qualified shall be 1.5 mm. & Max. will be 9.35 mm. as per QW-407.4. As per QW 451.1 qualified deposited weld metal thk. range will be 2t (viz. 5 mm. for TIG and 12 mm. for SMAW.) for groove welding. and for Fi...

The answers with different colors Ahmed Osman Orascom Construction Egypt +20 122 5880434   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of CHINTUKUMAR GANDHI Sent: Tuesday, February 28, 2012 2:10 PM To: materials-welding@googlegroups.com Subject: [MW:13792] BASE METAL THK. RANGE AS PER ASME SEC. IX.   Dear Experts,   Good day to all. I have 2 cases which are to be shared with you for my knowledge.   (1) I have qualified a WPS of 8.5 mm. Base metal Thk. of P-1 G-1 to G-2. Root Run TIG and subsequent SMAW. TIG weld deposit thk. 2.5 mm. and SMAW weld deposit thk. 6 mm. PWHT- Normalizing and Tempering with Impact test at MDMT (-45º C.)   As per my opinion, as per QW-403.6- Minm. T qualified shall be 1.5 mm. & Max. will be 9.35 mm. as per QW-407.4. As per QW 451.1 qualified deposited weld metal thk. range w...

Dear Experts,   Good day to all. I have 2 cases which are to be shared with you for my knowledge.   (1) I have qualified a WPS of 8.5 mm. Base metal Thk. of P-1 G-1 to G-2. Root Run TIG and subsequent SMAW. TIG weld deposit thk. 2.5 mm. and SMAW weld deposit thk. 6 mm. PWHT- Normalizing and Tempering with Impact test at MDMT (-45º C.)   As per my opinion, as per QW-403.6- Minm. T qualified shall be 1.5 mm. & Max. will be 9.35 mm. as per QW-407.4. As per QW 451.1 qualified deposited weld metal thk. range will be 2t (viz. 5 mm. for TIG and 12 mm. for SMAW.) for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct?   (2) I shall have to qualify a WPS of 6 mm. Base metal Thk. (T) of P No. 8 Group 1 to itself. Complete TIG.    As per my opinion, QW-202.4 (b) (1) and QW-451.1 Min Qualified T shall be 1.5 mm. and no limitation on Max. T qualified. As per QW 451.1 qualified deposited...

Dear, trichy Please refer UHA-51 of ASME SECOND VIII DIV - 1. Regards, Chirag Patel. Sent from BlackBerry® on Airtel -----Original Message----- From: " g.venkatesan06@gmail.com " < g.venkatesan06@gmail.com > Sender: materials-welding@googlegroups.com Date: Tue, 28 Feb 2012 03:24:17 To: materials-welding@googlegroups.com < materials-welding@googlegroups.com > Reply-To: materials-welding@googlegroups.com Subject: [MW:13790] Details about lateral expansion in impact testing. Dear experts, iam freshers in fabrication field. Can any one give me the answers for the following question. 1. What is lateral expansion. 2. Why it is required instead of J in impact testing. 3. What is the acceptable value of lateral expansion in stainless steel and carbon and low alloy steel. Show the code reference our code of construction is ASME Sec VIII Div1. Regards venkat/sisco projects, trichy -- To post to this group, send email to materials-welding@googlegroups.com To unsubscrib...

Dear experts, iam freshers in fabrication field. Can any one give me the answers for the following question. 1. What is lateral expansion. 2. Why it is required instead of J in impact testing. 3. What is the acceptable value of lateral expansion in stainless steel and carbon and low alloy steel. Show the code reference our code of construction is ASME Sec VIII Div1. Regards venkat/sisco projects, trichy -- 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,   Greetings.   During preheating of a weld joint  SOOT( Black spots) was observed on the base material ( SA 516 GR 70- 50 Thk). Please refer attached photo.   Please explain is there any  adverse effect on base material becuase  of the SOOT formation.   Thanks & 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'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.

This change in ferrite content is probably due to cooling rate difference .... related to solidification process. Prashant Nimbalkar From: shanmugam govindarajan <rajansgr@yahoo.com> To: MW-Google Groups. <materials-welding@googlegroups.com> Sent: Saturday, February 25, 2012 5:16 AM Subject: [MW:13777] Ferrite Number..... Dear Experts,   During Ferrite check on the strip cladding, we noticed FN as 1.5, 2, 2.5 whereas  project specn requires 3 to 10. These low FN is noticed near the cirseam joints in the vessel. May be the first or last pass of strip cladding when strip cladding is done in each shell.  Please send me some info about root cause, remedial action that is to be taken and reference to code/specn.     With regards, Govi. -- 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 opt...

Hi Ref. ASME B31.3 2010 328.5.4 Weleded Branch Connections (d) Brd. Set w. On Feb 25, 8:52 pm, km hanif < hanif...@gmail.com > wrote: > Dear Experts, > I need your help for the attached subject > > We are fabricating some well manifolds as per B31.3, Material ASTM A106. Gr > B. header size 4" sch 40 (6.02mm thk) branch connections with 2" sch 80 > weld-o-let. How we can calculate the required fillet size and it is > required to cover all portion (which area tacking with bore pipe) > > Kindly help me,, > > Thanks & Regards > >  Hanifa K. > >  Weld O let.bmp > 1552KViewDownload -- 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 m...

Gents,   I have interesting event. One of the client is expecting and interpreting the temperature 60 degree C  must be on Electrodes. So now we are increasing the Quiver temperature nearly 100 degree C to reach the Electrodes temperature to 60 degree. But we are not sure about this concept. We are trying to satisfy my Client.   But apart from the above, All the Electrodes manufacturer confirmed that the Quiver must be heated condition at least 80 Deg C to ensure the electrodes will not pickup any moisture.   So you need follow the Manufacture recommendation unless you do not have client spec which is asking something stringent.   With Kind Regards,   Malai From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of I.K.Inspection Services Sent: Sunday, February 26, 2012 10:07 AM To: materials-welding@googlegroups.com Subject: Re: [MW:13784] RE: 13168] Low Hydrogen Electrode in Steel Structur...

Dear all,            I would like to add small comments addition to Mr Kaja, Baking and holding is not required if the electodes used directly from vacuum packed carton which is manufacturer package.   regards IK On 8 December 2011 14:03, Kaja Mohideen < kaja@asw.sa > wrote: Dear Mr. Endri,   All kinds of basic coated Electrode (Low Hydrogen) must be baked for (E7018) at 230 degrees for 2hours then it transferred to Holding oven at 120 degrees for continuous use, After that you can issue the electrode from holding oven to portable oven at Minimum 60 degrees maintain for shop and Site welding,  Electrode return to holding oven at the end of the shift which electrode not exposed to atmospheric for the Maximum hours, So when the electrode exposed above the maximum hours, it shall be rebaked once, the rebaked electrode shall not be rebaked again, should scrap.   It's all about to prevent the electrode to control Moisture Pickup   Refer AWS A5.1: Specification fo...

Hi Anil, DC power sources for SAW are either  of CV or CC type. A constant-voltage power supply is self-regulating, so it can be used with a constant-speed wire feeder (relatively cheaper option) . No voltage or current sensing is required. The current is controlled by the wire diameter, the electrical sickout, and the wire-feed speed, while the voltage is controlled by the power supply. Constant-voltage dc power is the best choice for the high-speed welding of thin steel. As you know GMAW/FCAW welding machines  and majority of SAW machines are also of this type. The limitations of these machines are , they're sometimes unreliable is the current exceeds 1000A. Unlike constant voltage, constant-current power supplies are not self-regulating, so they must be used with voltage sensing variable-wire-feed speed controls (more expensive) . A constant-current wire feeder monitors arc voltage and adjusts the wire-feed speed in response to changes in the arc vol...

Dear Experts, I need your help for the attached subject   We are fabricating some well manifolds as per B31.3, Material ASTM A106. Gr B. header size 4" sch 40 (6.02mm thk) branch connections with 2" sch 80 weld-o-let. How we can calculate the required fillet size and it is required to cover all portion (which area tacking with bore pipe)   Kindly help me,, Thanks & Regards    Hanifa K. -- 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 Rao,   Is it pipe or plate ?   For Non tubular joints CJP WPS application to PJP joint need to verify with three macro etch specimens as per AWS D1.1. Cl 4.10.3   On Sat, Feb 25, 2012 at 11:43 AM, Chinnappa rao Basuthkar < cbnavigator@gmail.com > wrote: Dear Members   Is any body have qualfied WPS and PQR for reference purpose only for FCAW as per AWS D1.1 for the thickeness of material from 25 mm to 50mm.   If the WPS is qualifed for CJP ( Complete Joint Penetraion)  is it going to qualify for for PJP ( Partial joint penetraion )  and Filler welds also.   Regards   Chinnappa Rao Basuthakr On Mon, Jul 18, 2011 at 1:49 AM, kannayeram gnanapandithan < kgpandithan@gmail.com > wrote: if nothing is mentioned for gas, it is understood that it is usable in full CO2 /Ar+co mixture On Wed, Jul 13, 2011 at 7:12 PM, arvinda shan < arvindashan@gmail.com > wrote: Dear Experts,   I need some clarification in document review. PQR qualified in FCAW p...

Dear Members   Is any body have qualfied WPS and PQR for reference purpose only for FCAW as per AWS D1.1 for the thickeness of material from 25 mm to 50mm.   If the WPS is qualifed for CJP ( Complete Joint Penetraion)  is it going to qualify for for PJP ( Partial joint penetraion )  and Filler welds also.   Regards   Chinnappa Rao Basuthakr On Mon, Jul 18, 2011 at 1:49 AM, kannayeram gnanapandithan < kgpandithan@gmail.com > wrote: if nothing is mentioned for gas, it is understood that it is usable in full CO2 /Ar+co mixture On Wed, Jul 13, 2011 at 7:12 PM, arvinda shan < arvindashan@gmail.com > wrote: Dear Experts,   I need some clarification in document review. PQR qualified in FCAW process for 27 mm plate in 3G position. WPS is prepared for structural joint for 34 mm in all positions.What is the essential one?   In FCAW proces PQR , Electrode AWS no. E71-T-1C is used. But in WPS E71-T-1 is mentioned. Whether its ok? PQR in FCAW qualifies 3G positio...

Hi ! To get good Impact properties in SS weld you should i) Flux should be of basic nature having bsisity bet 3-3.5 ii)Interpass should be max 150C iii) No preheating for SS iv) Adjust current Voltage and SAw speed to get bead height not more than 2.5mm Try to cool the weld as fast as possible Regards Hegde P.B. --- On Fri, 24/2/12, pawan <pawan.tiwari@dwekam.org> wrote: From: pawan <pawan.tiwari@dwekam.org> Subject: [MW:13776] SS welding with SAW To: materials-welding@googlegroups.com Date: Friday, 24 February, 2012, 4:37 PM Dear Experts, Could anyone suggest me about the followings for stainless steel SAW welding to reach >0.38mm %LE at -196deg. cen.   Limitation of wire composition for ER308L grade wire. SAW welding parameters. (A/V/Speed) Preheating & Heat input for more than 50mm thick plate. Any other special requirement.   Rgd Pawan Tiwari   -- To post to this group, send email to materials-welding@googlegroups.com To u...

Dear Experts,   During Ferrite check on the strip cladding, we noticed FN as 1.5, 2, 2.5 whereas  project specn requires 3 to 10. These low FN is noticed near the cirseam joints in the vessel. May be the first or last pass of strip cladding when strip cladding is done in each shell.  Please send me some info about root cause, remedial action that is to be taken and reference to code/specn.     With regards, Govi.

Respected All, Generally continuous electrode wire welding is recommended to use with constant voltage (CV) power source characteristic i.e. GMAW ,FCAW and single wire SAW. For multi wire SAW instead of CV mode why constant current (CC) power source characteristic is recommended ??? what will be the effect on welding if we use CV mode for multi wire SAW. Regards. -- 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.

As per my opinion..they want to take avg of thickness for defined grid size rather taking a spot measurement.. Logic behind must be a limitation of mfgg to give uniform thickness throught the cross section in complete length..but this will be in benifit to u.. On Feb 22, 2012 12:45 PM, "khatri ankit" < nids01dme011@gmail.com > wrote: Dear Experts, In NPCIL project specification for seamless Alloy steel fittings,following sentence will be given as - Minimum thk will be calculated on grid size minimum 30mm for up to 50NB & 50mm for up to   500NB & 100mm for above size. I never heard about this, I want some information regarding this matter. Kindly share ur thoughts about this topic and give some referances regards, Ankit Khatri -- 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...

Dear Experts, Could anyone suggest me about the followings for stainless steel SAW welding to reach >0.38mm %LE at -196deg. cen.   Limitation of wire composition for ER308L grade wire. SAW welding parameters. (A/V/Speed) Preheating & Heat input for more than 50mm thick plate. Any other special requirement.   Rgd Pawan Tiwari  

Dear Harsha, In ASME B 16.25 , The SECTION 1.Scope PARA 1.1 General and  1.2 Application clearly states where and how this standard is applicable, hope you could read through and clarify. Regards, On Wed, Feb 15, 2012 at 6:24 PM, harsha bhat < harshnb@gmail.com > wrote: Dear Experts, I have a doubt pertaining to the bevel ends preparation as per ASME B16.25. While defining the type of end preparation for butt welding as per ASME B16.25, say for e.g. for nominal wall thickness greater than 25 mm GTAW root pass, on what basis do we decide the type of the bevelled ends in Fig.6. i.e. is it type A or Type B? Apart from the wall thickness what are the other parameters to be considered to select type of bevel ends from Fig.2(a), Fig,3(b)...etc. from ASME B 16.25. Is the base material also a parameter which governs for the selection of the type of bevel end preparation for butt welding? I request if any of you could guide me. Thanking you all in advance, Regards, Harsha Bhat. ...

Hi, Can anyone suggest about arc time using different wire dia for Robotic MIG Welding ? Thanks in advance, Joy Pal -- 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.

--- On Wed, 22/2/12, Prakash Hegde <pb.hegde@yahoo.com> wrote: Dear Sir,  I fully agree that Inconel 625 (EQNiCrMo3) we can achieve with two layers and Not with single layer of total weld overlay thickness of 7mm By ESSC process with proper magnetic stirring device adjustment  and we can generally get undiluted chemistry at 5-6mm from base line(Particularly of Fe less than 5%   Regards   Hegde P.B. Fabtech Projects and engrs Pune (India) --- On Wed, 22/2/12, Budi Witjaksono <budi.witjaksono@profab-group.com> wrote: From: Budi Witjaksono <budi.witjaksono@profab-group.com> Subject: RE: [MW:13769] Acceptance Criteria For Chemical Contents Inconel 625 Overlay To: "pgoswami" <pgoswami@quickclic.net>, "rinshad abdul rahman" <rinshad043@gmail.com> Cc: materials-welding@googlegroups.com Date: Wednesday, 22 February, 2012, 12:08 PM Dear Mr. Goswami,   Sorry for the late respond due to my current assignment. The...