Materials & Welding

How to measure DFT of paint coating painted on Fireproofed surface or concrete surface? -- 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.

what is stress relieving in welding, why it is done and can anybody explain the sr graph, parameters like holding temperature, holding time,etc. sr is done in same way for preheat and post heat? 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 Nautiyal,   Hydrogen disbonding test is conducted as per ASTM G146. After cladding LAS with required WOL(SASC 309L(cb) +347L in your case) the specimenn is prepared as mentioned in G146 & Ultrasonically tested. The test is conducted by Mettalurgical Lab in Mumbai in India and take 10days approx.   amarjit Singh   On 1/29/10, PREM SHANKARDUTT NAUTIYAL < prem_nautiyal@rediffmail.com > wrote: Dear Sir We have to deposit min. 6mm overlay by SASC on LAS - shell & Dish end I.D. First layer is by 309L(Cb) and subsequent layers by 347L. For this it has been specified that Weld specimen for Reheat cracking should be prepared. The procedure is : do cladding by SASC with high heat input,remove the clad till weld fusion layer is exposed and conduct MPI + Metallography. We have been told that Hydrogen induced cracking should be checked by welding a 50mm width overlay with E9018G on LAS with low heat input, kept at room temperature for 8-10 days... ( No reference standar...

Dear Sir I would like to add that the weld specimen for Reheat cracking has to undergo simulated PWHT before the clad is removed .. Regards Prem Nautiyal On Fri, 29 Jan 2010 20:07:13 +0530 wrote >Dear Sir > > We have to deposit min. 6mm overlay by SASC on LAS - shell & Dish end I.D. > First layer is by 309L(Cb) and subsequent layers by 347L. > > For this it has been specified that Weld specimen for Reheat cracking should be prepared. > The procedure is : do cladding by SASC with high heat input,remove the clad till weld fusion layer is exposed and conduct MPI + Metallography. > > We have been told that Hydrogen induced cracking should be checked by welding a 50mm width overlay with E9018G on LAS with low heat input, kept at room temperature for 8-10 days... ( No reference standard is mentioned ) > > I just needed more detailed information / procedure.. > > Regards > > Prem Nautiyal > > On F...

Dear Sir We have to deposit min. 6mm overlay by SASC on LAS - shell & Dish end I.D. First layer is by 309L(Cb) and subsequent layers by 347L. For this it has been specified that Weld specimen for Reheat cracking should be prepared. The procedure is : do cladding by SASC with high heat input,remove the clad till weld fusion layer is exposed and conduct MPI + Metallography. We have been told that Hydrogen induced cracking should be checked by welding a 50mm width overlay with E9018G on LAS with low heat input, kept at room temperature for 8-10 days... ( No reference standard is mentioned ) I just needed more detailed information / procedure.. Regards Prem Nautiyal On Fri, 29 Jan 2010 08:46:28 +0530 wrote > > > Hi Prem, Could you be more specific about your query:- · Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat...

  Hi Prem,   Could you be more specific about your query:-   ·     Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat cracking is very difficult to simulate.   ·     Regarding hydrogen cracking, there are standard tests developed and adopted by the industry. If you are familiar with Tekken Y-Grove test, it's a very popular test for hydrogen cracking. What's the test you're asked to perform in this case.   However underclad  hydrogen cracking  is a bit different issue. Typically it's commonly performed  as autoclave testing, and ASTM –G-146, is the standard followed for this underclad hydrogen disbanding test.   Due to copyright issue, I can not post the ASTM standard. However the attached article tells clearly how this test is performed.   Thanks   Pra...

Please see the attached or the following web site     http://www.astm.org/Standards/E1180.htm From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL Sent: Wednesday, January 27, 2010 12:12 PM To: materials-welding@googlegroups.com Subject: [MW:4159] Sulfur prints Dear All Can anyone explain what is meant by Sulfur prints ( BAUMANN PRINTS )?? How to check it.. It is related to a PV. Regards Prem Nautiyal PREM S NAUTIYAL CELL : 9820313278 -- 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 doc...

Dear Nandesh,   As Per Table - A1, A333gr.6 is exempted from impact testing until -45 Deg. How there could be an impact requirement @ -21 Deg.C.   Can you please clarify. Thanks and Best regards, K.Rajagopal On Thu, Jan 28, 2010 at 9:08 AM, Nandesh Kumar < nandeshkumar@rocketmail.com > wrote: Dear Mr. Pradeep,   Yes you are right. Please throw some more light on this issue   Material : ASTM A333 Gr. 6 Design code : ASTM B31.3 Service : LNG line Impact requirement : yes @ -21° C   Thanks for the suggestions. Nandesh --- On Wed, 27/1/10, pgoswami < pgoswami@quickclic.net > wrote: From: pgoswami < pgoswami@quickclic.net > Subject: [MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT? To: materials-welding@googlegroups.com Date: Wednesday, 27 January, 2010, 3:48 AM Nandesh,   Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾" or 20 mm pipe wall thickness. This is the PWHT criteria as per B-...

Dear Mr. Pradeep,   Yes you are right. Please throw some more light on this issue   Material : ASTM A333 Gr. 6 Design code : ASTM B31.3 Service : LNG line Impact requirement : yes @ -21° C   Thanks for the suggestions. Nandesh --- On Wed, 27/1/10, pgoswami <pgoswami@quickclic.net> wrote: From: pgoswami <pgoswami@quickclic.net> Subject: [MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT? To: materials-welding@googlegroups.com Date: Wednesday, 27 January, 2010, 3:48 AM Nandesh,   Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾" or 20 mm pipe wall thickness. This is the PWHT criteria as per B-31.3 -2008 code.   If the design code is not B-31.3 then PWHT requirements of the applicable design code will follow. Do you have impact requirements for LNG piping if so @ what temperature?.   If you could provide those details e.g. materials grade, SA 333 Gr1 or 6 , design code, design ...

Dear All Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test --- 1)Weld specimen for reheat cracking. 2)weld specimen for Hydrogen induced cracking The job is a PV, code of construction is ASME Sec III, NB. Regards Prem Nautiyal PREM S NAUTIYAL CELL : 9820313278 -- 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 Can anyone explain what is meant by Sulfur prints ( BAUMANN PRINTS )?? How to check it.. It is related to a PV. Regards Prem Nautiyal PREM S NAUTIYAL CELL : 9820313278 -- 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.

Nandesh,   Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾” or 20 mm pipe wall thickness. This is the PWHT criteria as per B-31.3 -2008 code.   If the design code is not B-31.3 then PWHT requirements of the applicable design code will follow. Do you have impact requirements for LNG piping if so @ what temperature?.   If you could provide those details e.g. materials grade, SA 333 Gr1 or 6 , design code, design temperature more comprehensive answers could be provided.   Thanks   Pradip Goswami, P.Eng 88,Garth Trails Crescent Hamilton,Ontario, L9B2X1,Canada Email-pgoswami@sympatico.ca Email-pgoswami@quickclic.net   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chandra, Vasanthan (Lagos) Sent: Tuesday, January 26, 2010 5:19 AM To: materials-welding@googlegroups.com Subject: [MW:4151] RE: 4150] ASME S...

Dear all does anybody have know information or refrences about enclosed arc welding & narrow gap welding with covered electrode especially in rail industry? regard advances. -- 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 Nandesh,                     For PWHT requirement detail is not given in ASME Sec IX, it is required based on construction code and Client specification.   As per ASME B31.3 , generally PWHT  required  for A333 Gr.6 is above 20 mm thk, but based on service fluid it will be higher requirement than code.   In my previous shell project some services requirement is 100%.   Louis Singapore     --- On Tue, 26/1/10, Nandesh Kumar <nandeshkumar@rocketmail.com> wrote: From: Nandesh Kumar <nandeshkumar@rocketmail.com> Subject: [MW:4150] ASME SEC IX...PWHT? To: materials-welding@googlegroups.com Date: Tuesday, 26 January, 2010, 3:03 PM Dear All,   For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW. Material is ASTM A333 . ...

Dear All, I have a requirement to qualify a welder in 2F position for SAW process. I have referred the test requirement in QW 542.5 of ASME Sec.IX. For fillet weld qualification, test coupon thickness is given up to 10 mm only. For SAW Qualification in 2F, shall i use plate thickness higher than 10mm? Is there any reference/limitations for plate thickness in Sec.IX? Pl. provide your valuable suggestions. regards P.Rao -- 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.

ASME IX is not a code that can determine the PWHT, you must use a code of construction like being ASME B31.3 or ASME VIII. Soon you must determine N° P and the group that ASTM A333 corresponds, since there are different considerations for what has been said Ruscitto >>> Nandesh Kumar <nandeshkumar@rocketmail.com> 26/01/2010 06:33 am >>> Dear All,   For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW. Material is ASTM A333 .   Thaks in advance Nandesh Kumar A Your Mail works best with the New Yahoo Optimized IE8. Get it NOW! . -- 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 person...

Nandesh,   PWHT requirement is to be cross referred in line with Construction/Design code. In your mail, the applicable design code is missing. However, assuming the design code as B31.3 (2008) for piping, PWHT is mandatory for a thickness >20mm.   Regards, Vasanth From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Nandesh Kumar Sent: 26 January 2010 10:33 To: materials-welding@googlegroups.com Subject: [MW:4150] ASME SEC IX...PWHT?   Dear All,   For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW. Material is ASTM A333 .   Thaks in advance Nandesh Kumar A Your Mail works best with the New Yahoo Optimized IE8. Get it NOW! . -- To post to this group, send email to materials-we...

Dear All,   For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW. Material is ASTM A333 .   Thaks in advance Nandesh Kumar A Your Mail works best with the New Yahoo Optimized IE8. Get it NOW! . -- 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.

Mr. Asghari,   The most influential variable in the SAW process is Arc Voltage (Arc Length). As voltage is increased, flux consumption increases.    If your Procedure utilizes an active flux (one that is relatively high in silicon, manganese or perhaps even chromium), weld chemistry can be influenced detrimentally especially in multipass welding.  For example, the silica tends to break down in the heat of the arc and can introduce adverse amounts of oxygen to the weld metal.     If you are using an alloying flux to recover alloy elements, voltage can significantly affect the amount of elements picked up through the rate of flux consumption.  Follow Manufacturers recommendations closely to obtain desired chemistry.   The reason FCAW requires backing is due to the fluidity of the FCAW puddle.    Thanks,   Darcy Morin           From: materials-welding@googlegroups.com...