Materials & Welding

There are lot of Factors involved in Radiography to determine the Density Variation for the ID penetration depth. Moreover you use a Double wall viewing and it is very difficult to determine. Other methods include 1. Boroscopy 2. Ball run Test. A steel ball with the required diameter shall be passed through the tubes and determine the depth of penetration. Thanks & Regards J.Gerald Jayakumar 0091-9344954677 On Wednesday, January 31, 2018, 2:52:31 PM GMT+4, 'Sankaran Sp' via Materials & Welding <materials-welding@googlegroups.com> wrote: Dear Experts, During pipe to pipe welding by  single V butt joint  by GTAW process (example : 1" XXS P91 pipe), there is a weld reinforcement over the groove and maintained 2 to3 mm of height, such a way ID penetr...

Dear Experts, During pipe to pipe welding by  single V butt joint  by GTAW process (example : 1" XXS P91 pipe), there is a weld reinforcement over the groove and maintained 2 to3 mm of height, such a way ID penetration is also there. How much of height ID penetration is allowed? which is to be checked by RT exam. Kindly clarify and give me any supporting/ document  reference. Regards,  Sankaran.SP Welding & Metallurgy expert Coimbatore, India

Hello Nadeem,  Backing Gas Purge Times for Stainless Steel Pipe Nominal Pipe Size Purge Time (minimum) 2 inch NS 0.5 minutes 4 2 minutes 6 4 minutes 8 7 minutes 10 10 minutes 12 15 minutes 16 25 minutes Assumes use of argon gas at a flow rate of 20 CFH (9 lpm). Listed times are for each 300 mm of pipe length to be purged (multiply by actual length). Use the values for 300 mm for any shorter length. as per standards ASME In order to obtain a suitably smooth, uniform under side weld surface without crevices or oxidation, a purge must be established using a suitable protective gas. Since the second and third passes in the joint may take the previously deposited consumable insert root pass above the oxidizing temperature of the base and filler metal, it may be necessary to maintain the purge until three layers or 3⁄16 in. (4.8 mm) root thickness is obtained. most cases ,refer to project specifications  from client (DGS) T&R Shyamal  On 31 January 2018 at 07:01, nadeem baig < mirzaan...

Dear Friends I need help regarding the reference from international standards for purging of stainless steel and alloy steel welding. Regards Nadeem  -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Its ASME committee which considers each material and decides if it can be included in code. May be they have not taken up Gr 350. Several reasons, may be they were not asked, may be no time, may be relevant details not given, may be considered and not acceptable to asme commitee. In case any body is interested, a request may be made to materials commitee. Rgds Prakash Gotimukul AIS, Consultant ASME/ISO/PED/IBR  gp rakash31@gmail.com . Mob:+971 55 711 4761 On Sun, Jan 28, 2018 at 8:49 AM, A < amolgengaje@gmail.com > wrote: ASME section IX does not specify P number of Is 2062grade E350. It specifies P number for grade E 250. Any guess  why only 1 grade of IS2062 is included in ASME? -- https://materials-welding. blogspot.com/ https://www.linkedin.com/ groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an emai...

ASME section IX does not specify P number of Is 2062grade E350. It specifies P number for grade E 250. Any guess why only 1 grade of IS2062 is included in ASME? -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Dear Ajay  Forging can be machined to required size of nozzle. Ideally manufacturers facility does permit nozzle weld overlay, they prefer to go ahead with SS pipe. Regards  Sudhir  Sent from my iPhone On 26 Jan 2018, at 8:25 AM, 'manish kulkarni' via Materials & Welding < materials-welding@googlegroups.com > wrote: Pl check project engineering specs Is it allowed to have nozzle material to weld on classes shell? If allowed, better to use heavy schedule pipe. Manish Kulkarni  Sent from Yahoo Mail for iPhone On Thursday, January 25, 2018, 5:06 PM, Raghuram Bathula < raghurambathula@gmail.com > wrote: why don't use pipe? On 25 January 2018 at 16:58, 'DOKKU AJAY' via Materials & Welding < materials-welding@googlegroups.com > wrote: Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms t...

To All.   Please read through the extracts from ASME Sec-VIII, DIV-1. I would think machining a hollow pipe section from a solid bar stock would not be technically acceptable due to the highlighted clauses as below. Also the manufacturing routes of seamless pipes and solid bar stocks are different. Seamless pipes are made by "Pilgering"(ref SA312 for example) while solid bars are made by forging.   Notes for pipes the starting material could be solid bar stock however the pipes have to be to heat treated following manufacturing. Technically there would be incompatibility of properties , such as flow of grains influencing the mechanical properties.   In view of the above clauses and so many technical ifs and buts  it would be worthwhile to stick to the option of seamless stainless pipes , which should be available plenty ex stock in anywhere.   This matter should be discussed and proceeded only after discussion with the ASME /Authorised inspector.   Thanks. ...

Hi ,  In another way , Nowadays lots of technology come up for Weld overlay of 2 inch and lesser diameter from fronius and polysude . We need to use the particular TIG torch if the vendor holds cladding machine. Alternatively ... you can proceed with SS forged material as long as material is properly tested with IGC and material MTC is enclosed from the mill with all heat number details and need to do PMI on material before welded with vessel. This is an additional information only. P.NEILASHKUMAR  Sent from my iPad MOB : 966 551094590              +91 9952110791 On 26-Jan-2018, at 4:35 PM, Ramin Kondori < raminkondori@gmail.com > wrote: Of course... it is acceptable... Ramin  Kondori Sr. QA/QC & Welding Engineer ----------------------------------------------------------- PG-Dip. in Welding Engineering   (I WE  AT  0070 ) BSc. in Civil Engineering (IUT) BGAS  Painting Inspector ASNT Level I&II  ...

Of course... it is acceptable... Ramin  Kondori Sr. QA/QC & Welding Engineer ----------------------------------------------------------- PG-Dip. in Welding Engineering   (I WE  AT  0070 ) BSc. in Civil Engineering (IUT) BGAS  Painting Inspector ASNT Level I&II                          On Thu, Jan 25, 2018 at 4:28 PM, 'DOKKU AJAY' via Materials & Welding < materials-welding@googlegroups.com > wrote: Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms that they cannot do weld overlay of 2" and less size. Alternative confirmed by vendor is to machine the Forged Bar to make 2" SS Pipe. Our Engineering has accepted the replacement of material from engineer point of view i.e from CS+SS Overlay to SS Matl. Query: Is it acceptable from code point of view to used forged item for manufacturing of ...

Procurement confirms non availability of pipe matl readily and the lead time will be 12 weeks. Sent from Yahoo Mail on Android On Thu, Jan 25, 2018 at 5:06 PM, Raghuram Bathula <raghurambathula@gmail.com> wrote: why don't use pipe? On 25 January 2018 at 16:58, 'DOKKU AJAY' via Materials & Welding < materials-welding@googlegroups.com > wrote: Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms that they cannot do weld overlay of 2" and less size. Alternative confirmed by vendor is to machine the Forged Bar to make 2" SS Pipe. Our Engineering has accepted the replacement of material from engineer point of view i.e from CS+SS Overlay to SS Matl. Query: Is it acceptable from code point of view to used forged item for manufacturing of Nozzle pipe. Regards, Ajay Kumar Dokku -- h...

Pl check project engineering specs Is it allowed to have nozzle material to weld on classes shell? If allowed, better to use heavy schedule pipe. Manish Kulkarni  Sent from Yahoo Mail for iPhone On Thursday, January 25, 2018, 5:06 PM, Raghuram Bathula <raghurambathula@gmail.com> wrote: why don't use pipe? On 25 January 2018 at 16:58, 'DOKKU AJAY' via Materials & Welding < materials-welding@googlegroups.com > wrote: Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms that they cannot do weld overlay of 2" and less size. Alternative confirmed by vendor is to machine the Forged Bar to make 2" SS Pipe. Our Engineering has accepted the replacement of material from engineer point of view i.e from CS+SS Overlay to SS Matl. Query: Is it acceptable from code point of view to used forged item for manu...

Hi, Please refer Sectuion VIII - Div.1 - UG 16 (c) - Mill under tolerance: 0.25mm or 6% of the thickness ordered. But in any case it should be more than the design thickness. Thanks& Regards,   (Karthik) Karthikeyan.S QA/QC Manager Agon Pacific Co.,Ltd. M: +66-655-174-397, +66-892-512-282 E-mail : k arthik6684@yahoo.com On Thursday, January 25, 2018, 8:26:46 PM GMT+7, pradip kumar Sil <pradipsil@gmail.com> wrote: Dear Everybody, Can anybody inform me how much mill tolerance thickness is acceptable for Plate material with code reference as per ASME. Thanks in advance. Regards, Pradip -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Gr...

Hi Pradip, For Carbon steel plates refer ASME Sec II PART A, SA-20 para 14 Sent from my iPhone On Jan 25, 2018, at 5:23 PM, pradip kumar Sil < pradipsil@gmail.com > wrote: Dear Everybody, Can anybody inform me how much mill tolerance thickness is acceptable for Plate material with code reference as per ASME. Thanks in advance. Regards, Pradip -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Hi Ajay, Yes it is acceptable to use forged rod as nozzle refer UG-14 of ASME SEC VIII Div.1 Sent from my iPhone On Jan 25, 2018, at 5:05 PM, Raghuram Bathula < raghurambathula@gmail.com > wrote: why don't use pipe? On 25 January 2018 at 16:58, 'DOKKU AJAY' via Materials & Welding < materials-welding@googlegroups.com > wrote: Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms that they cannot do weld overlay of 2" and less size. Alternative confirmed by vendor is to machine the Forged Bar to make 2" SS Pipe. Our Engineering has accepted the replacement of material from engineer point of view i.e from CS+SS Overlay to SS Matl. Query: Is it acceptable from code point of view to used forged item for manufacturing of Nozzle pipe. Regards, Ajay Kumar Dokku -- https://materials-weldin...

Dear Everybody, Can anybody inform me how much mill tolerance thickness is acceptable for Plate material with code reference as per ASME. Thanks in advance. Regards, Pradip -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

why don't use pipe? On 25 January 2018 at 16:58, 'DOKKU AJAY' via Materials & Welding < materials-welding@googlegroups.com > wrote: Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms that they cannot do weld overlay of 2" and less size. Alternative confirmed by vendor is to machine the Forged Bar to make 2" SS Pipe. Our Engineering has accepted the replacement of material from engineer point of view i.e from CS+SS Overlay to SS Matl. Query: Is it acceptable from code point of view to used forged item for manufacturing of Nozzle pipe. Regards, Ajay Kumar Dokku -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe fro...

Gents, I have the following query. Appreciate if someone can guide on this: Background:  Cladded Vessel, Nozzle of Size 2", MOC: CS+SS Cladd/ Overlay, Code of Construction: Sex.VIII Div.1 : Vendor confirms that they cannot do weld overlay of 2" and less size. Alternative confirmed by vendor is to machine the Forged Bar to make 2" SS Pipe. Our Engineering has accepted the replacement of material from engineer point of view i.e from CS+SS Overlay to SS Matl. Query: Is it acceptable from code point of view to used forged item for manufacturing of Nozzle pipe. Regards, Ajay Kumar Dokku

Hi Please check the gas purity  Also try to use oxygen monitor  with least count 0.01  Try to maintain Oxygen content less than 100 ppm if possible  Shyamal  On 24 Jan 2018 8:11 am, "Rems Okonkwo" < rems.okonkwo@gmail.com > wrote: Hello, The Porosity could be due to one of the following issues. 1. The purity of the gas. You need to get your gas from trusted and reputable manufacturer. Ensure you are given high purify gas mixture 2. You need to have an analyser to analyse the Oxygen content inside the pipe and this need to be there for at least 4 passes. 3. You need to clean the weld joint area with acetone. 4. You may apply drying of the joint with hot air blower. 5. Welding should be done in an enclose restricted area to reduce wind draught. Regards. Rems  IWE Nigeria On 23 Jan 2018 14:09, "Welding and material" < koswaraabi@gmail.com > wrote: My name is Abi, I've the problem about mixture gas Ar/N2, each my welder performed welding on te Material D...

Dear Experts, I am welding uPVC profiles (Thickness 2-3 mm and width 65-70mm) for making doors & windows and after welding at corner joints, the joints are getting cracked at the corner. The parameters which we are currently following are as follows: Temp: 245+,- 5deg C Welding Time: 30 sec Heating time: 30 sec Welding Pressure: 6 Bar Clamping Pressure: 4.5bar Please advice to join the crack free weld. Thank you in advance. With Kind Regards, Amit Kumar Singh Mob: +91-7898572921 Email: amit086@gmail.com -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/opto...

Its prob with instrument used for chemical analysis Plz test with oes, inform lab to use calibration block for ni alloy (inconel 625) before testing Yr specimen will be showing req values for %Fe -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Provide hardness of base metal haha haz & weld metal for further analysis What was the interpass temp How much gtaw & smaw weld thickness deposited -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Hello, The Porosity could be due to one of the following issues. 1. The purity of the gas. You need to get your gas from trusted and reputable manufacturer. Ensure you are given high purify gas mixture 2. You need to have an analyser to analyse the Oxygen content inside the pipe and this need to be there for at least 4 passes. 3. You need to clean the weld joint area with acetone. 4. You may apply drying of the joint with hot air blower. 5. Welding should be done in an enclose restricted area to reduce wind draught. Regards. Rems  IWE Nigeria On 23 Jan 2018 14:09, "Welding and material" < koswaraabi@gmail.com > wrote: My name is Abi, I've the problem about mixture gas Ar/N2, each my welder performed welding on te Material DSS which used mixture gas Ar/N2, always occured porosity on each welded. Does it mix gas can cause porosity defect ??????????????? Thanks -- https://materials-welding. blogspot.com/ https://www.linkedin.com/ groups/122787 --- You r...

Abi,   If premixed gases are procured from reputed manufacturers , it should not be a concern. What's the gas mix: Ar+2% N2 or Ar+5%N2 ? Higher percentage of Nitrogen in the gas mix may cause porosities in DSS welds. Also there are many other factors also , which could cause porosities in DSS welds. One has to see everything in totality.   Thanks.   P.Goswami.P.Eng, IWE. Welding & Metallurgical Specialist Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/ Email:pgoswami@quickclic.net,pradip.goswami@gmail.com   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Welding and material Sent: January 22, 2018 11:14 PM To: Materials & Welding <materials-welding@googlegroups.com> Subject: [MW:27277] Mixture Gas Ar/N2   My name is Abi, I've the problem about mixture gas Ar/N2, each my welder performed welding on te Material DSS which used mixture gas Ar/N2, always occured porosity on each welded....

Hi Daniel,   Several questions: 1.       Your photo shows 4 coupons, not just 1 coupon.  Please explain. 2.       What were the welding preheat and interpass temperatures? 3.       If the test coupon is only 1-1/2-inches thick, why was the PWHT soak time 4 hours? 4.       Since the PWHT soak time was 1150 o F, the coupon must have been an ASME P-No. 1 carbon steel.  What is the coupon's ASTM classification (e. g. SA-516-70)? 5.       The bend in the coupon implies uneven cooling, top to bottom. 6.       What were the maximum heating and cooling rates during PWHT? 7.       Did the coupon undergo PWHT in a furnace for equal heating and cooling on both sides? 8.       Or were electric resistance heaters employed?   Regards, Dennis Thomp...

My name is Abi, I've the problem about mixture gas Ar/N2, each my welder performed welding on te Material DSS which used mixture gas Ar/N2, always occured porosity on each welded. Does it mix gas can cause porosity defect ??????????????? Thanks -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Dear Experts, We had qualification with GTAW and SMAW (manual process) on 1.5" thick test coupon . to prepare build up welding procedure . our test coupon got Post weld heat treatment at 1150°F for 4 hours ( without solution annealing ) .  Test got failed at the  first step for side bend ( see attached picture ).  I`m looking for a reason or reasons  of this failure . Do you think the reason should came from , not perform solution annealing on the test coupon ? or something else should be reason ! Cheers,  DW -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://...

Hi Mohamed,   In addition to the response of Harish Kannepalli, some additional information may be of help. ·          Check the calibration and accuracy of the equipment used. ·          Whether it's OES or XRF , equipment precision and proper calibration is essential. ·          It's desired that the calibration block should match or be closer to the chemistry of the material being tested. ·          Also , the time of exposure , shorter exposure time for measurement could be erratic , and there could have variations in the reading. ·          It's advisable to take multiple reading with longer exposure time and then to report the average.   It would be good to know, if the suggestions as above solved your problem or not.   Thanks.   P.Goswami.P.Eng, IWE. Welding ...