Materials & Welding

No doubt Helium+Argon mixture will give better fusion and penetration, but i have welded lot of Al-Br with Pure argon. Hel+Ar mixture is a costly affair. Also preheat is must.   Regards   Prem Nautiyal --- On Sun, 9/30/12, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote: From: kannayeram gnanapandithan <kgpandithan@gmail.com> Subject: Re: [MW:15374] Aluminium Bronze welding To: materials-welding@googlegroups.com Cc: prem_nautiyal26@yahoo.com Date: Sunday, September 30, 2012, 1:13 PM use helium+argon mixture need not preheat clean properly pandithan In-charge/wt Cethar On 9/24/12, bo gyi < aungbomyint@gmail.com > wrote: > Hi > > Base material is B171 C61400 & 99.9995% argon is used. > > Regards, > > On Friday, September 21, 2012 10:01:11 PM UTC+8, prem nautiyal wrote: >> >> >> Hi >> >> Its not an easy task to weld Al bronze. >> What is your base material grade ? >...

Dear all    My design thickness of vessels shell with Spot Radiography(E=0.85) is below the 32 mm but my client requirement is above 32mm (Process requirement) its mandatory that vessel shall be full radiography as per UW-11(a) or not ?   Regards Yogesh Patel -- 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 documents.    

- Dear Experts; with reference to the subject referred above please let me advise with documentary evidence about tolerances for Painted items when DFT is specified. Why paining fail in cross cut/peel-off test(Pl. ref photograph attached)? How to control the same? Requested to advise Regards RK Vichare -- 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 documents. -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group,...

use helium+argon mixture need not preheat clean properly pandithan In-charge/wt Cethar On 9/24/12, bo gyi < aungbomyint@gmail.com > wrote: > Hi > > Base material is B171 C61400 & 99.9995% argon is used. > > Regards, > > On Friday, September 21, 2012 10:01:11 PM UTC+8, prem nautiyal wrote: >> >> >> Hi >> >> Its not an easy task to weld Al bronze. >> What is your base material grade ? >> Clean base metal and filler wire before welding. >> Use 99.995% pure argon. >> •Preheat 150 – 180 ˚C >> •Inter pass temperature @200 ˚C. >> •Inter run cleaning is very important to remove surface oxides >> >> Regards >> >> Prem Nautiyal >> Cell: 9769316004 >> >> --- On *Fri, 9/21/12, bo gyi < aungb...@gmail.com <javascript:>>* wrote: >> >> >> From: bo gyi < aungb...@gmail.com <javascript:>...

Dear All Experts   We are manufacturing flue gas duct piping for boiler chimni of 4* 360 MW, I have that confusion in one point that how to check the verticality of shell(of Dia 5m & one shell containng two segment of 2.5m height i.e. one shell of 5m height), now pls clarify that is it right to check the verticality of the shell at fabrication stage(of 5m height shell) bcoz we have no flat ground available to check verticality or On the other hand if the total height of flue gas duct piping is 275m then we can check the verticality of shell at erection stage bcoz at erection stage we will have flat ground.   Pls clarify   WIth regards   Ashwani

Dear one, As per my knowledge allignment tolerance generally(or specified by client) 1mm/meter length of the line. For eg. If one job is 8meter in length then allignment upto 8mm is acceptable. Regards-krishna M. On 9/29/12, vikas waghmare < vikas.waghmare08@gmail.com > wrote: > Dear Friend, > > Refer A530 clause 14, general requirement of CS pipe and alloy steel > pipe .It says that the seamless pipe should be reasonably straight and > give tolerance for welded pipe. > Secondly Asme B31.3 says that for angular misalignment above 3degree > design consideration changes . > We have to consider both above point ,and this is one of the reason > that code doesnt specify for alignment issue thinking that if pipe is > manufactured as per the above standards and angular misalignment is > within the limit there will be no issue for alignment . > I consider above points while doing inspection. > > > Vikas Waghmare > Bur...

yes, get approval from purchaser Thank & Best Regards,   M Veera SAMY- Bureau Veritas. Coimbatore       From: hsuthar@chemithon.co.in To: materials-welding@googlegroups.com Subject: [MW:15425] CAN WE USE IS 1367 GR. 10.9 INSTEAD OF A 193 GR. B7 Date: Sat, 29 Sep 2012 14:04:20 +0530 Dear pls reply me can we use bolt for IS 1367 GR. 10.9 INSTEAD OF A 193 GR. B7. Pls reply with reason   HEMANT SUTHAR QA/QC CEPL-SILVASSA 9712973092   -- 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 thei...

Dear Friend, Refer A530 clause 14, general requirement of CS pipe and alloy steel pipe .It says that the seamless pipe should be reasonably straight and give tolerance for welded pipe. Secondly Asme B31.3 says that for angular misalignment above 3degree design consideration changes . We have to consider both above point ,and this is one of the reason that code doesnt specify for alignment issue thinking that if pipe is manufactured as per the above standards and angular misalignment is within the limit there will be no issue for alignment . I consider above points while doing inspection. Vikas Waghmare Bureau Veritas Abudhabi On 9/26/12, Ammar Shaikh < ammar.ali.shaikh@gmail.com > wrote: > This is purely under juriscation of Client specifications. > It is usually the asthetics that influences the tolerences but in some > cases it is need of application too like in one of my jobs I had to allign > within *+* 0.5 which is very rear in normal ap...

Dear pls reply me can we use bolt for IS 1367 GR. 10.9 INSTEAD OF A 193 GR. B7. Pls reply with reason   HEMANT SUTHAR QA/QC CEPL-SILVASSA 9712973092  

Dear Muthu Bharthi,   It is required to qualified new PQR as per IS 7307 (APPROVAL TESTS FOR WELDING PROCEDURES - PART 1: FUSION WELDING FOR STEEL)   Para 4.1 A welding procedure test shall be required when any of the following changes are made to an approved welding procedure :   (f) - Any changes in type of electrode, filler material, flux or shielding gas.     While  IS 7310 - 1 - Title it self says that APPROVAL TESTS FOR WELDERS WORKING TO APPROVED WELDING PROCEDURES - PART 1: FUSION WELDING OF STEEL , hence it is not applicable for WPS/PQR qualification.   Regds/Jignesh     On Fri, Sep 28, 2012 at 10:17 AM, muthu barathi < muthu_barathi@rediffmail.com > wrote: Dear Sir, Hi Friends please help me to clear the doubt I have PQR qualification for 8mm thickness Fillet welding by using E6013 electrode. as per IS 7307 - Part I (1974). Base material IS 2062 Grade B Is it necessary to qualify 8mm thick by using E7018 electrode? 4. Changes affecting approv...

yes. you can! E7018-1 is better than E7018 in Low temperature Impact Value.     Roy   From: Sandeep K P Sent: Friday, September 28, 2012 3:41 PM To: materials-welding@googlegroups.com Subject: [MW:15415] electrode change without requalification   Dear friends,   is it possible to change an E7018-1 electrode to E7018 in a WPS without requalification. Charpy V notch test value is applicable in this case. Code is AWSD1.1. I found in table 4.6 in AWSD1.1 as changing of  electrode  is possible with the same SFA number and F number and A number. Please advice.......... -- Thank you,   Sandeep.k.p Dubai,UAE Mob:- +971 557405828   -- 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.blogspo...

ASME has no requirement for hardness and limited for macro testing.  For work to ASME the requirement for these tests generally would be from your customer specifications or contract and as such the direction should come from them.  Without direction from your customer, you could have your laboratory follow either the recommendations for hardness testing in either API RP582, Welding Guidelines for the Chemical, Oil, and Gas Industries , or BS EN 1043-2, Destructive tests on welds in metallic materials – Hardness Test, Part 2. Micro hardness testing on welded joints .  While not the same, the methodologies for indent location are similar.   Macro testing typically will involve an evaluation of the entire weld and HAZ after polishing and etching.  If performed I would recommend that the a photo of the entire weld be taken at a suitable magnification for archival documentation.  ASME IX only has discussion on macro evaluation of fillet welds, QW-183, and tube-to-tubesheet mocku...

Macro, micro, harness tests are required if done as per iso 15614 etc. You can check them where facilities are available as all are not eqipped for it. Sridhar ---------- Sent via Nokia Email ------Original message------ From: Vinod Kataria < vinod.kataria@blissanand.com > To: < materials-welding@googlegroups.com > Date: Friday, September 28, 2012 3:34:49 PM GMT+0530 Subject: [MW:15418] RE: 15417] HARDNESS and Macro location Dear Sasi, You can ask the lab to do hardness testing on weld metal, HAZ and parent Metal, the location shall be weld top, weld middle and weld bottom same with HAZ. With kind regards, Vinod Kataria General Manager Bliss Anand Private Limited, 92B/93B Sector 5 IMT Manesar,Gurgaon, National Capital Region Delhi. India . Phone : +91-124-4366000 (9 Lines) Mobile Phone : +91-9560199004 Fax : +91-124-2290884 From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups...

Drilling at both ends is required only for reparing of casting to avoid further propogation of cracks. Grinding or arc gouging is just sufficient for all other metals. Sridhar ---------- Sent via Nokia Email ------Original message------ From: mukesh.chaudhari < mukesh.chaudhari@orientalindia.net > To: < materials-welding@googlegroups.com > Date: Friday, September 28, 2012 2:33:41 PM GMT+0530 Subject: [MW:15415] Procedue for repairing cracks in base mental Dear expert, Is it required to do drilling at both the end of crack which is identified in parent mental? Regards, Mukesh chaudhari -- 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 ...

Cracks are said to be sharp in the end and more stress concentration is supposed to be in the weld ends -This concentrated stress is the basic reason for further development of the crack in the longitudinal direction.  In some cases if the crack is allowed and with in the limit - to avoid further development of cracks small drilling carried  out on the tip of the crack After drilling as there is no sharp edge of the crack - no more stress concentrations at the crack and chances of further cracking is avoided. Hope this technology can be used in the structural code. More details can be seen in AWS welding guide  These drills are called as self ending drills.  Even in some old car front wind shield glass we can see such small drills at the end of cracks- to avoid further development of the cracks.  WISH TO KNOW MORE ON THIS PL - MORE AND BETTER COMMENTS REQUESTED. On Fri, Sep 28, 2012 at 1:03 PM, mukesh.chaudhari < mukesh.chaudhari@orientalindia.net > wrote: Dear expert, ...

Dear Sasi, You can ask the lab to do hardness testing on weld metal, HAZ and parent Metal, the location shall be weld top, weld middle and weld bottom same with HAZ.   With kind regards, Vinod Kataria General Manager Bliss Anand Private Limited, 92B/93B Sector 5 IMT Manesar,Gurgaon, National Capital Region Delhi. India . Phone : +91-124-4366000 (9 Lines) Mobile Phone : +91-9560199004 Fax : +91-124-2290884   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sasi Sent: Friday, September 28, 2012 3:22 PM To: materials-welding@googlegroups.com Subject: [MW:15417] HARDNESS and Macro location   Dear sirs   I already done Procedure Qualification Test as per ASME Sec IX and sent it for mechanical and Destructive testing. The LAB people they are saying to detemine the location of Hardness testing and Macro testing. How I can reply to them. Please advise me . Quick reply , it will be very useful to me.     Thanks an...

Dear sirs   I already done Procedure Qualification Test as per ASME Sec IX and sent it for mechanical and Destructive testing. The LAB people they are saying to detemine the location of Hardness testing and Macro testing. How I can reply to them. Please advise me . Quick reply , it will be very useful to me.     Thanks and Regards Sasikumar.R This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient of this communication, we request you to notify the sender immediately by return email and destroy all copies and the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email is strictly prohibited. The recipient acknowledges that Punj Lloyd Limited or its subsidiaries and associated companies (collectively "Punj Lloyd Group") are unable to exercise control or ensure or...

Dear expert, Is it required to do drilling at both the end of crack which is identified in parent mental?   Regards, Mukesh chaudhari

Dear friends, is it possible to change an E7018-1 electrode to E7018 in a WPS without requalification. Charpy V notch test value is applicable in this case. Code is AWSD1.1. I found in table 4.6 in AWSD1.1 as changing of  electrode  is possible with the same SFA number and F number and A number. Please advice.......... -- Thank you,   Sandeep.k.p Dubai,UAE Mob:- +971 557405828 -- 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 documents.    

Dear experts I have to manufacture a welding electrode extruder head part for that  AISI 9310 material is recommended. Element Content (%) Ni 3.00-3.50 Cr 1.00-1.40 Mn 0.45-0.65 Si 0.15-0.30 P 0.025 (max) S 0.025 (max) Mo 0.08-0.15 C 0.08-0.13 the process sequence is, 1st it has to be machined then welded and after that heat treatment upto 60 HRC. I want to know the welding process and filler. in service this part has to bear a high pressure of flux. Kindly guide me about welding and right filler material for this part. -- 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 f...

MR RANENDRA , let me have the material specification details so that one can have the full details ex: like is 2062 gr a material to is 2062 gr a is 2062 gr b to gr b even the welding consumable will be specified on the type of the job usually for low strength we use E6013. if it need to with stand more strength we will be going for low hydrogen electrode like E7018 . . if we use is 2062 gr a to is 2062 gr a material and if it need withstand good strength then we need to go for E9018. as u may be aware that pre heating of electrode and all . i think after going through this u may be having a good idea if u need more u can mail me Regards, srikkanth On Wed, 26 Sep 2012 16:48:09 +0530 wrote >Dear Experts, Please guide which kind of consumable can be used for welding of CS with Cast Iron.   Ranendra Chakraborty -- > To post to this group, send email to materials-welding@googlegroups.com > To unsubsc...

Dear Sir, Hi Friends please help me to clear the doubt I have PQR qualification for 8mm thickness Fillet welding by using E6013 electrode. as per IS 7307 - Part I (1974). Base material IS 2062 Grade B Is it necessary to qualify 8mm thick by using E7018 electrode? 4. Changes affecting approval 4.1 A welding procedure test shall be required when any of the following changes are made to an approved welding procedure: 4.1.f ) Any change in type of electrode, filler material, flux or shielding gas. As per IS 7310 Part I (1974) 5. Extent of approval 5.1 General - The extent of approval for a welding procedure. When a change in the welding procedure according to $ of IS 7307 (part I) - 1974 require a new welding procedure test, this shall entail re-approval of the welder except in the following cases : c) A change from a basic to a rutile covered electrode. Please help for a clear answer. Thanking you for you valuable time you are going to give me ...

Dear expert, First off all you have to inspect the area visually, there are so many reasons for a chances to failure of  coating . Only low DFT is not a basic reason .if on the surface spot failure found after application of coating , you have to verify the defected area . Near the defected area cross cut-test is mandatory as per standared .If large area coating  is pill -off you should to do the pull - off test( As per specified std). The reason of coating failure as given below. 1- Poor surface preparation  2- surface contaminated due to presence of oil  and grease. 3-   chloride level  up to acceptable range. 4-Incorrect mixing of paint and re-coating  time interval not followed. 5 - curing reason On Thu, Sep 27, 2012 at 4:10 PM, sevak hiren < hirensevak80@gmail.com > wrote: Dear, Standard: SSPC PA 2 5.2.1 Minimum Thickness: The average of the spot measurements for each 10 m2 (100 ft2) area shall not be less than the specified minimum thickness. No single spot measu...

Dear, Standard: SSPC PA 2 5.2.1 Minimum Thickness: The average of the spot measurements for each 10 m2 (100 ft2) area shall not be less than the specified minimum thickness. No single spot measurement in any 10 m2 (100 ft2) area shall be less than 80% of the specified minimum thickness. Any gage reading may under-run by a greater amount. If the average of the spot measurements for a given 10 m2 (100 ft2) area meets or exceeds the specified minimum thickness, but one or more spot measurements is less than 80% of the specified minimum thickness, additional measurements may be made to define the non-conforming area. 5.2.2 Maximum Thickness: The average of the spot measurements for each 10 m2 (100 ft2) area shall not be more than the specified maximum thickness. No single spot measurement in any 10 m2 (100 ft2) area shall be more than 120% of the specified maximum thickness. Any gage reading may over-run by a greater amount. If the average of the spot measurements for a given 10 m2...

Yuo can use any mode of current AC or HWDC for WEP inspection. MT shall be done for tight laminations open to surface only. Best u do Ut for subsurface laminations. UT will give much better results than MT. UT shall be done before WEP. On Sep 19, 2012 3:07 PM, "Biplab Pal" < biplab.mech@googlemail.com > wrote: The fitting is gas cut and then grinded for modification work of pipeline.   On Tue, Sep 18, 2012 at 2:17 PM, muthu barathi < muthu_barathi@rediffmail.com > wrote: You have to mention some more details for correct advice. 1. whether the bevel was made by gas cut or machining? If gas cut used w, while gas cutting it might be opened if lamination was present. AC will detect only surface not sub surface. If you want to see sub surface defects then you have to go for HWDC. That also you can go up to 3mm effectively. On Mon, 17 Sep 2012 21:36:56 +0530 wrote >Dear Exparts,   I have a doubt regarding MPT method. I am going to check...