Materials & Welding

It is case by case, depend on gasket type, because the roughness of contact gasket surface will be smooth. Check also client requirement for gasket contact surface. Anyway, better you ask to paint maker how to clean such type of paint. Thank you Sent from my Hape Buluk® powered by Sinyal Lieur INDOSAT -----Original Message----- From: Adi < adinraos@gmail.com > Sender: materials-welding@googlegroups.com Date: Sat, 30 Apr 2011 05:27:07 To: Materials & Welding< materials-welding@googlegroups.com > Reply-To: materials-welding@googlegroups.com Subject: [MW:10894] Paint repair procedure Hi all.... Mistakenly flange serration area painted, Is anybody having repair procedure for this? It is acceptable to remove painted flange serration area by wire brush. Adi -- 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 h...

Dear all, pl tell us.. Any acceptance standards for fitup & fabrication of structural steel.. Like welding codes AWS D1.1, ASME 9. My client is not specified any codes.. & let me know any codes availabe for fitups like.. Type of joints & how much joints permitable in 6 meter.. type of inserts permitable.. Misalignment permitable.. Thanks & regards m -- 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 Krishnakumar,   I addition to below valuable information here are some more important points to consider.   1) For process piping ( services you mentioned) normally Series A flanges been used. Series A flanges are heiver in weight with more no of bolts and in continuation of ASME B16.5. 2) For CWS you can use series B flanges since they are compact and light weight and hence more economical. 3) For the compatibility purpose you need to check existing flanges series.     Please do not mix series A flanges with Series B flanges, otherwise it will be a big mess. Hope the above information will be helpfull for you.   Regards.   Hafiz Ali Alvi   Date: Fri, 29 Apr 2011 17:54:38 -0700 From: poojvin@yahoo.com Subject: Re: [MW:10888] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services To: materials-welding@googlegroups.com Dear Mr Krishnakumar,   To standardize the pipe flanges for sizes NPS 26 t...

Hi all.... Mistakenly flange serration area painted, Is anybody having repair procedure for this? It is acceptable to remove painted flange serration area by wire brush. Adi -- 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,                  I have checked all the tables in sec IX; no where mentioned QW-406.6 as essential variable or essential variable.           But in page 69 in sec IX it states that A change in nominal size of electrode or diameter specified in the WPS. I couldn't understand this statement. Can somebody explain me please?   Regards Ilangkumaran   -- 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,                  While my routine inspection of welding I have noticed Diameter of the electrode used for the capping was not as per the qualified WPS and I was told the diameter of the electrode is not an essential variables.     WPS for SMAW   Now as per the sec IX; Table QW-253   1) the essential variable QW-404.30   2) Supplementary variables QW-404.7/.12   3)  Non essential varaiable QW-404.6          & as per the QW-353   1) QW-404.15/.30 were the essential variables for welder qualification.   So if the diameter of electrode used in production welds beyond 6mm then only the WPS needs to be re written? or Should we insist the welder to use what ever mentioned in the qualified WPS? or the welder should use the electrode that he used while performing his...

Dear expert,   we manufaturing two tank for oil storage as per API 650 ,that design temp is 87C and 174C respectively.Here any essiential for charpy impact test?if need please mention temperature. -- 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.

No PWHT for duplex clad as temp between 300 to 850 degC will form intermetallic phases and affect the corrosion properties. suggest  u carry out PWHT of equipment  with barrier layer of 309L Mo  and then deopsit duplex over barrier layer. regards vanchi On Fri, Apr 29, 2011 at 10:01 AM, Prakash Hegde < pb.hegde@yahoo.com > wrote: Dear Friends I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm ) The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld   i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8) ii) If yes do we require to carry out PWHt at lower Temp.   Regards Hegde P.B. 08805593046   -- 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, ...

Dear Mr.Hegde,   You have not specified composition of overlay -22 Cr or 25 Cr. The DSS overlay and subsequent PWHt at 600 Deg.C is not advisable primarily for Alfa Prima microstructure which is likely to form in this temp. range. Corrosion tests ( G 48) and Hardness test may reveal this.However it is difficult to take out sample for G 48 test with 3 mm overlay on CS.   Probable solutions-   1) Incolloy 625 overlay instead of DSS. 2) Carryout PWHT after completion of overlay after first pass and overlaying other passes after PWHT. 3) Carryout SSC/SCC test with Simulation heta treatment for the process conditions as stated in NACE.   Regards,   Manish Kulkarni --- On Fri, 29/4/11, Prakash Hegde <pb.hegde@yahoo.com> wrote: From: Prakash Hegde <pb.hegde@yahoo.com> Subject: [MW:10879] Duplex Claded Eqipt PWHT To: materials-welding@googlegroups.com Date: Friday, 29 April, 2011, 10:01 AM Dear Friends I have a query about The Duplex ...

Dear Mr Krishnakumar,   To standardize the pipe flanges for sizes NPS 26 to NPS 60 for class 75 through to Class 1500 ASME B 16.47 was developed . At that time it was decided to include the flange dimensions as per MSS SP 44 flanges except Class 75 which are ASME/API 605 flanges. Since the dimension of these two classes of flanges were not compatible with each other it was decided that  MSS SP 44 flanges are B 16.47 Series A flanges and  API 605 flanges are designated as B 16.47 Series B flanges.   Standards followed: ASME B 16.5 : UP TO SIZE NPS 24 ASME B16.47 SR.A / SR.B : UP TO SIZE NPS 60 (for rating150& 300) AWWA C-207 : UP TO SIZE NPS 144 (without Hub) & UP TO SIZE NPS 96 (With Hub) - Pls. refer this standard while giving reference of this for any size. Other member may offer their comment,    Vinod --- On Fri, 4/29/11, Krishnakumar M S <krishnakumarms01@yahoo.com> wrote: From: Krishnakumar M S <krishnakumarms01@yahoo.co...

I have one more point to add after cladding, sometime you may find cracks . But these cracks usually do not extend upto the base material and usuallydo not propogate during service. Therefore there usually is no need for PWHT. With regards Arijoy Roy R&D Telcon , India. --- On Fri, 29/4/11, Pieper QSI <pieper-qsi@kpnmail.nl> wrote: From: Pieper QSI <pieper-qsi@kpnmail.nl> Subject: [MW:10883] RE: 10879] Duplex Claded Eqipt PWHT To: materials-welding@googlegroups.com Date: Friday, 29 April, 2011, 12:51 PM Dear Mr. Hedge,   When executing PWHT at 600 °C your corrosion resistance will be reduced because of the formation of Sigma phase (FeCr precipitates) in the microstructure of the cladding. Sigma phase can occur in the temperature range from 450 °C – 850 °C so if you will discuss lowering the PWHT temperature you should go for 400 max. but I would choose to propose withholding PWHT and take care of controlling welding parameters during production. You ...

Dear Venu, The maximum allowable hardness at any location on welded surfaces, after final machining shall be less than 35 HRC for Ni-Cr-MO-Co (Inconel 625). Please confirm with vendor regarding PWHT but usually required with this alloy, assuming Weld qualification in accordance with ASME Sec ix, following are the aspects to be considered while reviewing WPS/PQR:- -No limit on max. deposit thickness qualified- No worries in your case -Base metal thickness range (1" to unlimited)- No worries in your case - for processe depositing a weld bead width greater than 1/2 in. wide, the weld overlay shall consist of a minimum of three weld beads in the first layer. - When a chemical composition is specified in the WPS, chemical analysis specimens shall be removed at locations specified in QW-462.5(b) or QW-462.5(e). The chemical analysis shall be performed in accordance with QW-462.5(a) and shall be within the range specified in the WPS. This chemical analysis is not required when a chemical...

  Dear : All,   IQI in Duplex Steel type  must be applied  to perform the  Radiography Testing  for Duplex Steels  , Did you had any references  from  ASME CODE to Refuse the application.   Please advise......     Regards Mus    

Dear Mr Herman Pieper Thanks for Suggestion My openion ,which can be debated i) If I carry out restoration of cladding by barrier layer of ry 309LMo chemistry  and carry out PWHT as per code ii)After PWHT go for rest of the layer by Duplex electrode and no further PWHT (Of course PQR is to be qualified accordingly) What is your openion ? Regards Hegde P.B. From: Pieper QSI <pieper-qsi@kpnmail.nl> To: materials-welding@googlegroups.com Sent: Fri, 29 April, 2011 12:51:54 PM Subject: [MW:10883] RE: 10879] Duplex Claded Eqipt PWHT Dear Mr. Hedge,   When executing PWHT at 600 °C your corrosion resistance will be reduced because of the formation of Sigma phase (FeCr precipitates) in the microstructure of the cladding. Sigma phase can occur in the temperature range from 450 °C – 850 °C so if you will discuss lowering the PWHT temperature you should go for 400 max. but I would choose to propose withholding PWHT and take care of controlling welding parameter...

Dear Mr. Hedge,   When executing PWHT at 600 °C your corrosion resistance will be reduced because of the formation of Sigma phase (FeCr precipitates) in the microstructure of the cladding. Sigma phase can occur in the temperature range from 450 °C – 850 °C so if you will discuss lowering the PWHT temperature you should go for 400 max. but I would choose to propose withholding PWHT and take care of controlling welding parameters during production. You may propose executing portable MicroVickers hardness tests after weld completion in order to demonstrate no high hardness values are present at the HAZ near weld surface. Most important is to convince your client to withhold PWHT because of the corrosion resistance of the cladding. When client insist on any kind of stress relieve treatment you perhaps can convince them to use high frequency hammering of the cap layer and HAZ. This will introduce compressive stresses in the surface up to 2 mm instead of the tensile stresses presen...

I believe the depth of the pitting should not exceed 10% of the nominal wall thickness viz the manufacturing tolerance.   Best Wishes Aftab Ahmad   From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of sunil javed Sent: Friday, April 29, 2011 11:10 AM To: materials-welding@googlegroups.com Subject: Re: [MW:10881] acceptance standards for pittings for SA 516 GR 70 Plates   There is a tolerance for the thickness for the recied materials in Sec VIII div 1, I think that is 20% of PO thickness. Please verify, I donlt have the code with me now to specify the paragraph.   I think, we can accept the plate if the remaining thickness after removing the pitting area, by gtinding and actual thickness check, is meeting the design thickness including CA, we shall not remove the CA from the acailable thickness as this is the new project material. we shall not go upto the CA (no...

There is a tolerance for the thickness for the recied materials in Sec VIII div 1, I think that is 20% of PO thickness. Please verify, I donlt have the code with me now to specify the paragraph.   I think, we can accept the plate if the remaining thickness after removing the pitting area, by gtinding and actual thickness check, is meeting the design thickness including CA, we shall not remove the CA from the acailable thickness as this is the new project material. we shall not go upto the CA (normally this will be 2 to 3 mm).   Javed On Mon, Apr 25, 2011 at 3:06 PM, asad azmi < azmiasadayub@gmail.com > wrote: Dear All,   Greetings.   what is the acceptance standard for pittings on SA 516 GR 70 Plate.   I mean what is the depth and diameter allowed.   Thanks and Regards   Asad Azmi -- 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 opti...

Hi, I have to use 30", 42", 48" pipes in Cude Oil, Naphtha, HSD and CRWS services. What is the criteria between the series A & B for ASME B16.47. Regarding no. of bolts, enonomy, availability etc. If anyone to know this please. Regards Krishnakumar Fact Engineering & Design Organisation (FEDO) Cochin, India

Dear Friends I have a query about The Duplex  cladded E quipment having base material SA 516 Gr70 of 50mm thk and clad of Duplex (3mm ) The eqipment require to undergo PWHT at 600C The Joint is clad restored by Duplex weld   i) Does the PWHT at 600C will affect  the Corrosion properties of Duplex weld (Corrosion test like IGC,Pitting corrosin,etc  as per GS8) ii) If yes do we require to carry out PWHt at lower Temp.   Regards Hegde P.B. 08805593046  

hi On Apr 7, 10:19 am, JASPAL SINGH < jaspaldh...@gmail.com > wrote: > Dear Members, > > This is with reference to Normalizing requirement clad dish ends above > 16mm Thickness. > > Is it advisable to go for Normalizing treatment of clad dish end(300 > series clad, Duplex). > > As most of the customer ask in the specification that dish end above > 16mm shall be normalised, can we interpret this that the same is > applicable for non cladded plates only. > > What may be the pros & cons. > > Regards > > Jaspal Singh > Quality Assurance > ISGEC-Yamunanagar > -9996624244 -- 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 ...

H ello Anup, M IC attack is very common in the industry. Would  you please elaborate on the scenario, e.g:- service, materials of construction and other aspects noted. MIC can be minimized a number of ways. Also reduction in pipe thickness could be alarming if it service is severe, and goes close to the required design thickness. Feel free to get some basic information at this link:- http://events.nace.org/library/corrosion/Microbial/Introduction.asp T hanks Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist & Consultant Ontario,Canada. Email-pgoswami@sympatico.ca, pgoswami@quickclic.net -----Original Message----- From: materials-welding@googlegroups.com [ mailto:materials-welding@googlegroups.com ] On Behalf Of naik_anoop@rediffmail.com Sent: Tuesday, April 19, 2011 11:49 PM To: materials-welding@googlegroups.com Subject: [MW:10751] Reduction in thickness Can somebody give details on reduction in pipe thickness due to corrosion by micro biolog...

Dear    For corrosion over lay as per ASME SEC IX    LPT, Hardness and Bend test is essential  and Chemical analysis required if it is mentioned in WPS RAVIKUMAR T S SENIOR ENGINEER- From:         Prakash Hegde <pb.hegde@yahoo.com> To:         <materials-welding@googlegroups.com> Date:         04/26/2011 10:51 PM Subject:         Re: [MW:10872] RE: Inconel 625 overlay on AISI4140 Sent by:         <materials-welding@googlegroups.com> For Overlay weld ,Only corrosion properties are checked and not any other mechanical test .All mechanical properties are calculated on base metal of the component Regards Hegde P.b. From: ravi <akravi54@gmail.com> To: materials-welding@googlegroups.com Sent: Tue, 26 April, 2011 2:33:19 PM Subject: Re: [MW:10859] RE: Inconel 625 overlay on AISI4140 Dear Mr Moturu,   How ar...

Dear Mr Ricardo,   is it acceptable if plate thickness is  within acceptable limit and piting can be left as it is.   is there any surface conditionong/smoothenening is required or not.       pls suggest and give code reference if possible.   thanks and regards On Tue, Apr 26, 2011 at 4:05 PM, Dindo < dindodelacruz@gmail.com > wrote: Hi Azmi   If it is for new construction, then you can check the minimum thickness, If it doesn't meet your PO or thickness requirement then you can reject the plates, the supplier should have fix the pitting on their side and done all NDE required.   Ricardo On Tue, Apr 26, 2011 at 2:01 AM, Kathalingam Babu < kathalingam.qaqc@ppl.com.sg > wrote: Hi Azmi,   CA-Corrosion Allowance   You may refer the material spec. to get the CA.   Thanks & Regards,   K. Babu   ----- Original Message ----- From: asad azmi To: materials-welding@googlegroups.com Sent: Tuesday, April 26, 2011 1:17 PM Subjec...

Dear Vikas, The ASTM/ASME equivalent of structural material S355J2+N is ASTM A572 Gr-50   Best Regards, M.K.Choudhary P.O. Box 877,  Dammam  31421  KSA Phone  : (+9663) 8471840 X 555 Fax       : (+9663) 8471291 www.zamilsteel.com   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Arunachalam A Sent: Tuesday, April 26, 2011 9:14 PM To: materials-welding@googlegroups.com Subject: Re: [MW:10867] ASME/ASTM equivalent of S355J2+N   It is NOT ASTM A36. A36 has specified tensile of 420 N/mm2.     On Tue, Apr 26, 2011 at 4:44 PM, SENTHILKUMAR SWAMINATHAN < skumarswami@yahoo.co.in > wrote: Vikas, Refer attached may help you. Hope it is A36 (ASTM)   Regards, S.SENTHILKUMAR     From: Vikas Bhandari < vikas.bhandari349@gmail.com > To: materials-welding@googlegroups.com ...

For Overlay weld ,Only corrosion properties are checked and not any other mechanical test .All mechanical properties are calculated on base metal of the component Regards Hegde P.b. From: ravi <akravi54@gmail.com> To: materials-welding@googlegroups.com Sent: Tue, 26 April, 2011 2:33:19 PM Subject: Re: [MW:10859] RE: Inconel 625 overlay on AISI4140 Dear Mr Moturu,   How are you checking the effect of cyclic loads on the overlay? What kind of testing was carried out? Regards, Ravi On Mon, Apr 25, 2011 at 1:43 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: What is you code of construction, was there any lethal or sour service requirements? Hardness restrictions? Requirement of SCC etc. What is the tempering temperature of the base material (probably 540 °C is recommended as it should not exceed the tempering temperature), refer the datasheet tempering temperature for this material in the range of 540-680°C   From: venu ...