Materials & Welding

Dear Navaneetha kumar,   It is not clear for what application the pipe is ?????????   If the pipe is for High Pressure line then it should be REJECTED.   Regards   Abdul Jabbar Khan --- On Sun, 31/7/11, navanee kumar <dnkuit@gmail.com> wrote: From: navanee kumar <dnkuit@gmail.com> Subject: [MW:12001] Roller marks To: materials-welding@googlegroups.com Date: Sunday, 31 July, 2011, 2:20 PM Dear Experts, Is it acceptable roller marks on the pipe? Please find attached photographs.   Thanks&Regards, Navaneethakumar.D. +971505583738 -- 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. ...

Dear Bharat,   The F.No for E7018  is 4   The F.No for E6010 is 3   Hence Change in F Number is Essential Variable. For change in Essential Variable Requalification of PQR is Required. you cant make WPS for E7018 only.    Hope the answer to your question .   Regards   Abdul Jabbar Khan --- On Sun, 31/7/11, BHARAT GOLE <bharatgole@hotmail.com> wrote: From: BHARAT GOLE <bharatgole@hotmail.com> Subject: [MW:12003] Single bevel PQR can we use as backweld To: "Material Welding" <materials-welding@googlegroups.com> Date: Sunday, 31 July, 2011, 4:54 PM  I have PQR with for single bevel with E6010 root & E7018 for fill & Cap as per ASME IX Can I prepare WPS with back weld with help of same PQR.....only using E7018 ? Expert your comments pl with ref to ASME Clause Regards Bharat   -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email...

Dear all, can anybody tell while S.S& CU-NI ALLOYS welding GTAW process purging need to check oxygen percentage is required. the asme B31.3 & ASME section IX says anything about how much allowable percentage of oxygen content . tour valluable inputs highly appreciated.   Regards ANTONY On Sun, Jul 31, 2011 at 9:11 AM, kannayeram gnanapandithan < kgpandithan@gmail.com > wrote: Gas purging is not required for SMAW /FCAW process, that is it is depend on process also bare wire welding process like TIG/PAW/GMAW, purging is required Pandithan Cethar Ltd Trichy On Sat, Jul 30, 2011 at 7:29 AM, sudhakar kuppuswamy < mechsudhakar@gmail.com > wrote: Gas Purging is done to avoid oxidation during welding. Gas purging is Mandatory to all material which responds to oxidation during welding  irrespective of process.. generally  when the Cr content exceeds more that 2.5 % in overall composition of a particular material inert gas purging should be done before wel...

Mr Navaneethakumar,                   Please can you  give more details like design code,service condition. design temperature and pressure. if the  service condition are   high pressure&temperature  then these are not acceptable..!! if it is normal  pressure  and temperature depends on service condition you  can make your  judgement and accepted..!!  simply rejecting is not a correct solution always !!!! with regards, sudhakar.k On Sun, Jul 31, 2011 at 2:20 PM, navanee kumar < dnkuit@gmail.com > wrote: Dear Experts, Is it acceptable roller marks on the pipe? Please find attached photographs.   Thanks&Regards, Navaneethakumar.D. +971505583738 -- 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...

Join Laser Online group and u will be Able to get all Info u want Girotra Sent on my BlackBerry® from Vodafone From: materials-welding+noreply@googlegroups.com Sender: materials-welding@googlegroups.com Date: Sun, 31 Jul 2011 05:03:45 +0000 To: Digest Recipients<materials-welding+digest@googlegroups.com> ReplyTo: materials-welding@googlegroups.com Subject: [MW:11995] Digest for materials-welding@googlegroups.com - 6 Messages in 4 Topics   Today's Topic Summary Group: http://groups.google.com/group/materials-welding/topics To calculate welding penetration [2 Updates] How to prepare WPS and PQR [2 Updates] [MW:11988] Regarding plate welding of unlimited thickness [1 Update] relation between preheat or post heating to tensile strength [1 Update]  Topic: To calculate welding penetration ashish yadav <yadavashish018@gmail.com> Jul 30 11:55AM +0530 ^   Hello experts   I have two ques...

yes ,consider the position also. regards On Sun, Jul 31, 2011 at 4:26 PM, Mahmoud < mqreis@gmail.com > wrote: Yes Regards Mahmoud Qreis On Jul 31, 2011, at 12:39 PM, "NAJM UL ISLAM" < najmislam246@gmail.com > wrote: Dear Experts, Greetings,   Can somebody advise me that if a welder is qualified for butt weld either in 5G position (Pipe horizontal) or 2G position (Pipe Vertical) whether  he will be qualified for fillet welds or not.   Thanks & Regards   NAJM UL ISLAM -- 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...

Dear Navneet, First of all this pipes are conforming to which code and standard? U may check the thickness of the roller marks if it is going beyond your minimum thickness requirement then not acceptable. If not than there is a provision that surface imperfection may be remvoed by grinding. Regards Yash On Sun, Jul 31, 2011 at 7:17 PM, Suresh < bobsuresh24@gmail.com > wrote: Mr .Navaneet,   If the Code ASME 31.3 ...,as long as the thickness is beyond the 12.5 % of wall thickness..It has  Acceptable ...   Go though the wall thickness one by one and make a decision as per ASME 31.3 Code requrement .   Thanks   Suresh On Sun, Jul 31, 2011 at 2:20 PM, navanee kumar < dnkuit@gmail.com > wrote: Dear Experts, Is it acceptable roller marks on the pipe? Please find attached photographs.   Thanks&Regards, Navaneethakumar.D. +971505583738 -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to...

Mr.Islam ,   Your query is not correct ...5G position tells you that pipe is rotating but electrode is constant at 45 degrees                                         2G position is tells you that pipe should be horizontal  position ..not in vertical ...   If the welder is qualified in buttwelds in limited thickness ...welder can qualify for all filletwelds ..unlimited thickness..   Thanks   Suresh On Sun, Jul 31, 2011 at 2:09 PM, NAJM UL ISLAM < najmislam246@gmail.com > wrote: Dear Experts, Greetings,   Can somebody advise me that if a welder is qualified for butt weld either in 5G position (Pipe horizontal) or 2G position (Pipe Vertical) whether  he will be qualified for fillet welds or not.   Thanks & Regards   NAJM UL ISLAM -- 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://mate...

Mr .Navaneet,   If the Code ASME 31.3 ...,as long as the thickness is beyond the 12.5 % of wall thickness..It has  Acceptable ...   Go though the wall thickness one by one and make a decision as per ASME 31.3 Code requrement .   Thanks   Suresh On Sun, Jul 31, 2011 at 2:20 PM, navanee kumar < dnkuit@gmail.com > wrote: Dear Experts, Is it acceptable roller marks on the pipe? Please find attached photographs.   Thanks&Regards, Navaneethakumar.D. +971505583738 -- 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  & Best Regards, Suresh Mobile No: ...

Dear,   You can proceed since addition of backing is non- essential in SMAW & GTAW.   Regards   Arvinda. On Sun, Jul 31, 2011 at 3:24 PM, BHARAT GOLE < bharatgole@hotmail.com > wrote:  I have PQR with for single bevel with E6010 root & E7018 for fill & Cap as per ASME IX Can I prepare WPS with back weld with help of same PQR.....only using E7018 ? Expert your comments pl with ref to ASME Clause Regards Bharat   -- 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...

Not acceptable Regards Mahmoud Qreis On Jul 31, 2011, at 12:50 PM, navanee kumar < dnkuit@gmail.com > wrote: Dear Experts, Is it acceptable roller marks on the pipe? Please find attached photographs.   Thanks&Regards, Navaneethakumar.D. +971505583738 -- 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. <101_5320.JPG> <101_5321.JPG>

Yes Regards Mahmoud Qreis On Jul 31, 2011, at 12:39 PM, "NAJM UL ISLAM" < najmislam246@gmail.com > wrote: Dear Experts, Greetings,   Can somebody advise me that if a welder is qualified for butt weld either in 5G position (Pipe horizontal) or 2G position (Pipe Vertical) whether  he will be qualified for fillet welds or not.   Thanks & Regards   NAJM UL ISLAM -- 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.

 I have PQR with for single bevel with E6010 root & E7018 for fill & Cap as per ASME IX Can I prepare WPS with back weld with help of same PQR.....only using E7018 ? Expert your comments pl with ref to ASME Clause Regards Bharat  

Dear experts, What is the minimum thickness range for welder qualification. 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 Experts, Is it acceptable roller marks on the pipe? Please find attached photographs.   Thanks&Regards, Navaneethakumar.D. +971505583738 -- 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, Greetings,   Can somebody advise me that if a welder is qualified for butt weld either in 5G position (Pipe horizontal) or 2G position (Pipe Vertical) whether  he will be qualified for fillet welds or not.   Thanks & Regards   NAJM UL ISLAM

Due to more resistance of SMAW Electrode size and length for current to flow, higher voltage is required Pandithan Cethar Ltd Trichy On Fri, Jul 29, 2011 at 5:06 PM, Prasu Cutie < pracuty@gmail.com > wrote: Dear Experts, for the same current voltages are different for GTAW & SMAW why???  Plz explain GTAW     90-180A   9-14V SMAW    90-180A   22-26V Regards Prasad -- 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@g...

Gas purging is not required for SMAW /FCAW process, that is it is depend on process also bare wire welding process like TIG/PAW/GMAW, purging is required Pandithan Cethar Ltd Trichy On Sat, Jul 30, 2011 at 7:29 AM, sudhakar kuppuswamy < mechsudhakar@gmail.com > wrote: Gas Purging is done to avoid oxidation during welding. Gas purging is Mandatory to all material which responds to oxidation during welding  irrespective of process.. generally  when the Cr content exceeds more that 2.5 % in overall composition of a particular material inert gas purging should be done before welding.... I don't think by using  MIG process   we can avoid puring!!! Mr Prasad can I know for what material your talking about???   regards sudhakar.k  n Fri, Jul 29, 2011 at 8:41 PM, abdul khan < abdul_khan2010@yahoo.co.in > wrote: Dear Prasad Gas purging is done only on P number 5 and above base metal , purging is not based on welding process or type.   I hope the answe...

  dear all             I'm     glad to answer to this question, thought it cannot be explained in single mail.                                     Answer for 1 st question-By preheating & post heating we have two advantages 1. To avoid hydrogen induced cracking 2. To reduce the cooling rate during solidification of weld metal.                By reducing the cooling rate we can avoid Martensite (hard structure) formation during weld metal solidification               Martensite is hard brittle structure ,where the hardness is high, so tensile strength also will be soo high,  but other required properties like impact strength, ductility are very less and makes the steel not fit for use.             If   the interpass temperature goes high than the required , it many leads to coarse grain formation during weld metal solidification due to slow cooling , Generally coarse grain results in  low toughness and less   te nsile strength properties               Answer for 2...

I want to qualify my WPS as per ASME 9 On Sat, Jul 30, 2011 at 10:24 AM, Dinesh Somwanshi < som.din@gmail.com > wrote: can you tell me you will qualify your wps as per code? aws d1-1 or asme 9 On Sat, Jul 30, 2011 at 8:35 AM, tahir alam < tahiralam007@gmail.com > wrote: Hello Can anybody help me to prepare WPS and PQR of CS plate of thickness 6.3mm and process is SMAW...........pls anybody help me , -- 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, ...

Ashish, We have in our facility the welding processes like SMAW, SAW, GTAW & GMAW. The reason behind to quality PQR is to weld AISI 4145 Base material for build up and machine back to drawing required dimensions. Ashish you are right, this material can be used for Tool joints, Drill pipe and Collars manufacturing purposes,because it meets to API minimum Yield strength requirements. Regards, Mubeen +966-565013851 On Fri, Jul 29, 2011 at 9:05 PM, ashish baviskar < ashishqci@gmail.com > wrote: dear Mubeen,                         Please tell me which type of welding you are going to use . Whether it is SAW or SMAW or FCAW ? AISI 4145 material are mostly use in API spec 7 , 7-1 products like drill collars, drill pipes , subs etc. and also tell me the application.  On Fri, Jul 29, 2011 at 10:01 AM, mubeen mubeen < mubeenaws@gmail.com > wrote: Hi, Can anybody help me out in order to weld subject base material with appropriate consumables(Electrode or filler wire), al...

Please refer W.M. Steen-Laser Processing of Materials 2011/7/30 ashish yadav < yadavashish018@gmail.com > Hello experts I have two questions:- 1. How to calculate penetration and upper and lower weld width in laser welding analytically (not by experiment), if you know the beam power, focal position, spot diameter at focal position and focal length. 2.In experiment of laser welding i seen that if i am focusing the laser beam inside the material it is giving me less penetration rather than focusing well above the material. How can it be justified? waiting for your valuable suggestions. -- Regards Ashish Yadav Institute for plasma research -- 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 mean...

can you tell me you will qualify your wps as per code? aws d1-1 or asme 9 On Sat, Jul 30, 2011 at 8:35 AM, tahir alam < tahiralam007@gmail.com > wrote: Hello Can anybody help me to prepare WPS and PQR of CS plate of thickness 6.3mm and process is SMAW...........pls anybody help me , -- 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-w...

Hello experts I have two questions:- 1. How to calculate penetration and upper and lower weld width in laser welding analytically (not by experiment), if you know the beam power, focal position, spot diameter at focal position and focal length. 2.In experiment of laser welding i seen that if i am focusing the laser beam inside the material it is giving me less penetration rather than focusing well above the material. How can it be justified? waiting for your valuable suggestions. -- Regards Ashish Yadav Institute for plasma research -- 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 docum...

Hello Can anybody help me to prepare WPS and PQR of CS plate of thickness 6.3mm and process is SMAW...........pls anybody help me , -- 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 abdul,                 if the welder qualifies in 6G position to maximum thickness (more than 13mm). that welder is qualified in 4G position on plate also upto maximum thickness. On Sat, Jul 30, 2011 at 9:09 AM, arvinda shan < arvindashan@gmail.com > wrote: Dear Mr.Abdul,   6G is for position. If he qualifies in 6G position, he can do welding in any position . Reference.....SecIX- QW-461.9   For thickness, upto 13 mm thickness , he qualifies 2T. Beyond 13 mm , unlimited thickness.  Reference..... Sec IX -QW-452.1(b)   Regards   Arvinda. On Fri, Jul 29, 2011 at 8:19 AM, Suresh < bobsuresh24@gmail.com > wrote: Mr.Abdul ,   Your query is not clear ....Thickness qualification is  depends on weld cupon thickness , not depends on  Position ...   If the welder is qualified 6G Position then he can qualify any position but not any thickness..   Normally Sex IX , 2T is welder for thickness range qualification   Suresh On Thu, Jul 28, 2011 at 7:32...

Dear experts,                    Please solve my doubts                    Could u please explain                    1) Is their any relation between Preheating/ Post heating/interpass temp to Tensile strength?                    2) metallurgically what will happen when bead width and bead thickness increases in SAW process? Is this any effect to tensile strength?                       -- THANKS & REGARDS   KALYAN VVV WELDING ENGINEER HYDERABAD Mob.NO- 09885273257 -- 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 Mr.Abdul,   6G is for position. If he qualifies in 6G position, he can do welding in any position . Reference.....SecIX- QW-461.9   For thickness, upto 13 mm thickness , he qualifies 2T. Beyond 13 mm , unlimited thickness.  Reference..... Sec IX -QW-452.1(b)   Regards   Arvinda. On Fri, Jul 29, 2011 at 8:19 AM, Suresh < bobsuresh24@gmail.com > wrote: Mr.Abdul ,   Your query is not clear ....Thickness qualification is  depends on weld cupon thickness , not depends on  Position ...   If the welder is qualified 6G Position then he can qualify any position but not any thickness..   Normally Sex IX , 2T is welder for thickness range qualification   Suresh On Thu, Jul 28, 2011 at 7:32 PM, abdul khan < abdul_khan2010@yahoo.co.in > wrote: Dear Experts ,   If the wleder is  qualifide for 6G test , can he weld the plate of  unlimited thickness ? or he needs to Qualify 4G test to weld unlimited thickness of plate ?   wether the 6G welder is sap...

Gas Purging is done to avoid oxidation during welding. Gas purging is Mandatory to all material which responds to oxidation during welding  irrespective of process.. generally  when the Cr content exceeds more that 2.5 % in overall composition of a particular material inert gas purging should be done before welding.... I don't think by using  MIG process   we can avoid puring!!! Mr Prasad can I know for what material your talking about???   regards sudhakar.k  n Fri, Jul 29, 2011 at 8:41 PM, abdul khan < abdul_khan2010@yahoo.co.in > wrote: Dear Prasad Gas purging is done only on P number 5 and above base metal , purging is not based on welding process or type.   I hope the answer to your  question.   Regards ABDUL JABBAR KHAN --- On Fri, 29/7/11, Prasu Cutie < pracuty@gmail.com > wrote: From: Prasu Cutie < pracuty@gmail.com > Subject: [MW:11977] gas purging To: materials-welding@googlegroups.com Date: Friday, 29 July, 2011, 5:01 PM Why gas purging is...

If in your case, conditions require simultaneous operation where one welder may affect another welder, I believe you want to go for a WQT (not PQR) with the same conditions. However if the job is like welding a pipe and welders are already qualified, that doesn't need a new qualification. It's up to your judgement...!!! Ramin  Kondori    QC / Welding Engineer           IWE AT 0070      On Fri, Jul 29, 2011 at 7:51 PM, abdul khan < abdul_khan2010@yahoo.co.in > wrote: Dear Prasu,   The simple answer read it carefully.   Essential variable : The variable which affects the properties of the weld metal is known as essential variable. Change in essential variable requires requalification of PQR.   Welding Technique is Non essential variable and hence will not affect the properties of the weld metal and no requalification of PQR is required.   The DOT /DWT technique it will not affect the properties of the weld metal and hence Requalification of PQR is not re...