Materials & Welding

Dear Maganth,   I assume person from the TPI is good in technical.   Assume the product may be in the Jack case applications in Shipbuilding or similar applications.   In order to reduce the fabrication time , they will go for the forged rather than the 2 pcs then weld again.   In that cases, the best way to do welding simulation by welding the actual test pcs by approved WPS.   Majority of the cases, the forged company will supply small test pcs from the production heat for the verification to the customer approval   If the plate thickness is more than 100 mm , it is suggested to do verification of WPS in actual forged steel materials   Since the forged materials , may be less in CVN and elongation , it is better to verify the mechanical properties in the actual pcs after welding by approved WPS.     On Wed, May 30, 2012 at 1:00 PM, Lab < lab@cochinshipyard.com > wrote: Dear Friends,   In our production unit, we would like to make butt weld be...

Dear Megnath,                    Just follow ISO guide on Uncertainty Measurement. In simple steps: 1. Take atleast five readings for the required parameters (n=5) 2. Calculate, Mean & Standard Deviation 3. Take machine uncertainty given in calibration certificate 4. Combine and calculate Combined Uncertainty. 2012/5/31 Lab < lab@cochinshipyard.com > Dear friends,   Can any one spare the Uncertainty Measurement of tensile test (Tensile strength, % Elongation etc) using UTM. This is just to understand before NABL Accreditation.   Regards, A Megnath The information contained in this message are Cochin Shipyard Limited confidential and proprietary information and is intended only for the use of the recipient(s) named above. If the reader of this message is not the intended recipient, he/she is hereby notified that any use, dissemination, distribution, or copying of this communication or any of the content is strictly prohibited. In such case, pl...

Dear friends,   Can any one spare the Uncertainty Measurement of tensile test (Tensile strength, % Elongation etc) using UTM. This is just to understand before NABL Accreditation.   Regards, A Megnath

Dear Sir,   My problem is not with grade of the steel (S355J2G3). The TPI insists on WPS using forged steel of the above grade. There are some agencies to supply the rolled steel of the same grade, but no one responding for forged steel of S355J2G3.   Your comment on the above, please.   Regards, A Megnath ----- Original Message ----- From: pgoswami To: materials-welding@googlegroups.com Cc: lab@cochinshipyards.com Sent: Thursday, May 31, 2012 4:01 PM Subject: FW: [MW:14427] WPS on Forged Steel Hi Megnath,   Please see two attachments for your reference. My feel is this grade of steel could be supplied in both shapes, either as bar or plate. You need to confirm the same from supplier. The other choice is perform a comprehensive PMI of the forged bar, and calculate the carbon equivalence (CE) and match the same  with the composition and calculate CE of the...

I forgot to attach the file, sorry   From: alexis_viteri@hotmail.com To: materials-welding@googlegroups.com Subject: Filler metal with lower strength thsn base metal Date: Thu, 31 May 2012 08:10:26 -0500 Dear Experts,   Could you please share your criteria/experiencie regarding procedures that are qualified (API 1104 or ASME IX) with filler metals with lower strength than base metal, for instance, e6010 (SY 48 KSI / SUT 60 KSI) used to weld API X52 (SY 52 KSI  / SUT 66KSI). According to the document attached it could be a choice, but i don't understand very well why the tensile test was cleared and how this fact could impact in a gubernamental audit.   Thanks and regards Alexis

Hi,   Flange Face Surface Finish The American National Standards Institute (ANSI) code for flanges and flanged fittings (ANSI B16.5) requires that the flange face has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 microinches.   This allows for various grades of surface finish to be made available by flange manufactures for the gasket contact surface of metal flanges. These grades are often referred to by name e.g. stock finish. The exact definition of each grade may differ between manufacturers, but can be generalised as follows;   Stock Finish The gasket contact surface is typically formed by a continuous (sometimes called phonographic) spiral groove generated by a 1.6mm radius round-nosed tool at a feed rate of 0.8mm per revolution with a depth of 0.15mm. This will resul...

dear Rishi, frankly speaking , as per my knowledge  for shop use no instrument is there . but you can buy ready comparator in which different steel surfaces are available for different AARH values. you have to compare your product surface with that standerd prepared surface by hand and visual inspection and decide whether your product meet the required range or not. i am waiting for other experts view on this. thanks ansari. On Wed, May 30, 2012 at 3:29 PM, K.M Hrishikesan < hrishikm07@gmail.com > wrote: Hi   I need following precise information urgently..   Which instrument/comparator can I use to check the serration of flange face (ideally for 125 to 250 AARH) Kindly mention the make, brand etc   Thanks Hrishi -- 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...

Hi Megnath,   Please see two attachments for your reference. My feel is this grade of steel could be supplied in both shapes, either as bar or plate. You need to confirm the same from supplier. The other choice is perform a comprehensive PMI of the forged bar, and calculate the carbon equivalence (CE) and match the same  with the composition and calculate CE of the  proposed plate to be supplied. If both the values are close it would give confidence to the TPI.    Hope this would be of help.     Thanks.   Pradip Goswami ,P.Eng.IWE Welding & Metallurgical Specialist Ontario , Canada . Email-pgoswami@sympatico.ca , pgoswami@quickclic.net     On Wed, May 30, 2012 at 2:00 PM, Lab < lab@cochinshipyard.com > wrote: Dear Friends,   In our production unit, we would like to make butt weld between forged steel grade of S355J2G3, a round shaped obje...

See T-276.2 (a). Thickness  based on nominal single wall thickness plus estimated reinforcement as per reference code. Regards Doni Afrizal -- 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, Can any one tell whether I can carry out PWHT of clean out door welding after erection of first shell course? We have erected the clean out door section of the shell plate and completed vertical welding without performing the PWHT. As per API 650, it needs to be completed PWHT regardless of thickness before assembly(erection). if that is the case, I have to cut the joint and do the PWHT and reweld again.Can I do PWHT at site after erection? If not, any one explain me what is the reason behind it. Why API is insisting to have PWHT before erection. Cheers, Thomas -- 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....

Lower the Amperage, Higher the velocity. Roy Bohler Welding Group -----原始邮件----- From: bo gyi Sent: Thursday, May 31, 2012 8:40 AM To: Materials & Welding Subject: [MW:14422] SS347 overlay but FN is too low Dear all, I have encountered that Ferrite No is too low for SS347 overlay to P1 (SAW). I used ESAB ER309L & ER347 together with OK flux 10.93 and heat input is about 0.9 - 1 kJ/mm. My Ferrite no is as bellow . (check by Ferrite scope) 1st layer 309L (2mm thk from BM) , FN no. < 0.5 2nd layer 347 ( 4 mm thk from BM) , FN no < 2 3rd layer 347 ( 6 mm thk from BM) , FN no < 3.5 Required FN is 5 to 11 FN, My welding parameters are as follow. For 309L , 280 � 330 A, 30 � 32 V , travel speed 720 � 800 mm/min For 347 , 330 � 350 A, 32 � 34 V , travel speed 720 � 800 mm/min Please advice. Regards, Bogyi -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this grou...

Such welds will be rejected for having failed to meet WPS requirements, to say the least. --- On Wed, 30/5/12, pradip kumar sil <pradipsil@gmail.com> wrote: From: pradip kumar sil <pradipsil@gmail.com> Subject: [MW:14419] Acceptance criteria for root oxidation To: materials-welding@googlegroups.com Date: Wednesday, 30 May, 2012, 11:59 PM Dear experts, As per ASME B 31.3 what is the acceptance criteria for the root oxidation in M catagory fluid. Thanks in advance. Regards Pradip -- 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 ...

Dear experts, Can any one answer the following: one inches butt weld is radiograped double wall single image technique. The wall thickness is 2.91 mm and weld reinforcemnt is 1.6mm. In accordance with ASME-V article-2 T-276 what will be the thickness that the penetrameter based on. In another way the thickness that the penetrameter based on will be (2.91mm+1.6mm=4.51mm) or (2.91 mm+2.91mm+1.6mm +1.6 mm=9.02mm) ? The "interpretation" of ASME Section V clearly defines the "Material thickness" in question. The height of weld reinforcement at both sides of pipe is applicable in this case & which wire is be visible Looking forward to have your answer with appreciation. Many Thanks in advance Regards Pradip -- 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...

Dear all, I have encountered that Ferrite No is too low for SS347 overlay to P1 (SAW). I used ESAB ER309L & ER347 together with OK flux 10.93 and heat input is about 0.9 - 1 kJ/mm. My Ferrite no is as bellow . (check by Ferrite scope) 1st layer 309L (2mm thk from BM) , FN no. < 0.5 2nd layer 347 ( 4 mm thk from BM) , FN no < 2 3rd layer 347 ( 6 mm thk from BM) , FN no < 3.5 Required FN is 5 to 11 FN, My welding parameters are as follow. For 309L , 280 – 330 A, 30 – 32 V , travel speed 720 – 800 mm/min For 347 , 330 – 350 A, 32 – 34 V , travel speed 720 – 800 mm/min Please advice. Regards, Bogyi -- 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...

Hi,   If Ur code of test is ASME-IX, then for an Example, refer QW-255 for FCAW Process , heat input is a Supplementary variable if U have Impact test, hence limit Ur parameters as per the variable table.   Then Current ,  Volt, travel speed are non Essential variable , if there is no Impact Test for Ur PQR.   In PQR U should right, what U observed the actual parameters and should weld as per the welding paramaters recommended for a partiuclar brand from the consumable manufacturer. And in WPS, it is purely based on Impact or Non Impact test conditions, U should refer Essential variable table .   If there is no impact test and also heat input is not an essential varaible, then U can refer to the consumable manufacturer's recommendation for welding parameters, for each size of electrodes or Fillers.   I think this is enough.......   Cheers, Sarav                 On Wed, May 30, 2012 at 9:17 PM, senins welo < senins054@gmail.com > wrote: Dear experts,          what i...

Hi, This is the beauy of this forum that we as an individual don't have enough time to read all the codes and keep tracking of the changes happening with new editions, then forums like this keep updating everybody associated with idustry. Now coming back to original question regarding fillet weld qualification (WPQ) in accordance with API 1104, It is generally accepted that welder qualification on groove weld qualifies fillet weld as well, however for procedure qualification (PQR), API 1104 does ask for a separate qualification (Refer 5.7 & 5.8) and procedure is qualified by visual examination, NDT and mechanical testing. Your query seems to be more contractual than technical, if Welder qualification specifically on fillet welds is clearly mentioned in the Client spec then it would not be wise to even discuss with Client, if there is no clear description in the spec or spec only dictate to follow API 1104 then you have all the rights to claim for extra expenditure f...

Dear experts, As per ASME B 31.3 what is the acceptance criteria for the root oxidation in M catagory fluid. Thanks in advance. Regards Pradip -- 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.

Remember you can't judge depth with a radiograph. -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Vu Duc Thuan Sent: Wednesday, May 30, 2012 1:38 AM To: materials-welding@googlegroups.com Subject: RE: [MW:14413] Code & Standard for Tubing Dear All, Thanks for your supporting, that mean, we will check RT films and the densities of RT film to be measured at both weld metal and base metal location, it should compared the densities result as per B31.3 table 341.3.2 Regards, Vu Duc Thuan Email: dthuan117@gmail.com Mobile: +84 983 017 936 Sky: vdthuan_vtau -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of sankar bombay Sent: Wednesday, May 30, 2012 11:40 AM To: materials-welding@googlegroups.com Subject: Re: [MW:14408] Code & Standard for Tubing Dear friend, B31.3 there have give...

Dear experts,          what is the range of welding parameter (CURRENT,VOLTAGE,TRAVEL SPEED,ETC.) for WPS  from PQR.? OR how based parameter in WPS.I want ur clarification. thanks, -- 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 Friends,   Need clarification regarding Supplementary Requirement of Thermal Stabilization of A213 TP321 tube materials used for heater jobs.   As per the requirements of the Licensor, thermal stabilization was carried out for tube materials used for coils in heater.   After welding with ER347 and E347 filler metals, thermal stabilization was carried out for the weld and HAZ.   I went through the earlier posts that is available in our group. I would like to have clarification regarding the following:   Skin Thermocouples are to be welded with the coils. The material of thermocouple is SS310.   1. What is the consumable that has to be used for welding the thermocouple SS310 with the A231TP321 tube. Joint would be Fillet.   2. Do we need to perform the same Thermal Stabilization for this weld also? If yes what would be the reason?   Please advice.   Thanks and regards,  Sivakumar.M.R.   

Hi   I need following precise information urgently..   Which instrument/comparator can I use to check the serration of flange face (ideally for 125 to 250 AARH) Kindly mention the make, brand etc   Thanks Hrishi -- 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 Sir,   I don’t know what your welding specification is but when you speak about S355J2G3 material it seems to me that it will be according to EN-ISO 15614-1 because it’s an European material. For this specification both forged and rolled materials are group 1.2 materials and no difference is made between forged or rolled condition as long as both materials are in the normalized condition. Furthermore Table 3 of this EN-ISO 15614-1 also mentions with note “a”  that a qualification made with a specific material in group 1 also qualifies for materials in the same group with similar or lower specified minimum yield strength. I know from my experience that forged materials in general have lower yield strength than rolled materials (mostly caused by thicker wall thicknesses) so therefore the TPI is asking things outside the specification and in my opinion they have no right to ask for exactly the same material. Only problem could be when your project spe...

Hi,   You can see this Equivalent Grades in this website Steel - Equivalent Grades.mht and convince them, if all the properties are same as per S355J2G3 material.      Also, refer the attached data for BS Material equivalent  to S355J2G3 material.   Just try this.   Cheers, Sarav   On Wed, May 30, 2012 at 2:00 PM, Lab < lab@cochinshipyard.com > wrote: Dear Friends,   In our production unit, we would like to make butt weld between forged steel grade of S355J2G3, a round shaped object. The Third part Inspection (TPI) agency which clears the joint, insists us to perform WPS on similar material before production welding. This particular material was imported from other country long back and we could not thick about WPS when we purchased. It is not possible for us to get the similar material (same grade & same condition) suitable for WPS as well as WPQ and no response from the suppliers when contacted for supply of small quantity.   ...

Dear All, Thanks for your supporting, that mean, we will check RT films and the densities of RT film to be measured at both weld metal and base metal location, it should compared the densities result as per B31.3 table 341.3.2 Regards, Vu Duc Thuan Email: dthuan117@gmail.com Mobile: +84 983 017 936 Sky: vdthuan_vtau -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of sankar bombay Sent: Wednesday, May 30, 2012 11:40 AM To: materials-welding@googlegroups.com Subject: Re: [MW:14408] Code & Standard for Tubing Dear friend, B31.3 there have given teh acceptance for the root concavity check table:341.3.2 check the density of the root and parrent material.. its should not more than parent materialn at concavity side ( lenght is not given we dont want to considered ) API 510 we have accpetance its should not be more 6mm lengh of concavity depth same ...

Hello Southern Pipelines, Unfortunately the AIA is correct in this case. API 1104 requires a separate WPS for fillet welds (Clause 5.4.2.3) “Joint Design” being an essential variable. Your welders then have to qualify for that specific WPS (See clause 6.2 and 6.3). Sorry Graham Adams Pipetech   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Clubb, Archie Sent: 29 May 2012 09:10 PM To: materials-welding@googlegroups.com Subject: Re: [MW:14400] RE: 14374] Range of approval for WELDER qualified to weld grove welds according to API 1104   John/others The grouping system is open to abuse and ASME need to recognise this soon - their statement re the grouping must not be taken unilaterally is small print! Always guys are hiding behind ASME and this is wrong! More in particular with corrosion resistant requirements which ASME does not cover apa...