Materials & Welding

Hi,  I have a strange situation about Hydrostatic Test ...... Until now we used to let all welds of piping system no painted........ now our client read in B31.3 and open the discussion that in code is wrote that is allowed to paint the welds before hydrostatic test...... What do you think about that????? regards -- Daniel Iordache Bureau Veritas - Angola Mechanical& Welding Surveyor Mobile Ao: +244921544583 Mobile Ro:   +40721731728 E-Mail: daniel.iordache@gmail.com           daniel_iordache@yahoo.com -- 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.

Distilled water will have standard value, that has to be cross check before testing suck out water on the digital meter and you have minor calculation which is demonstrated in kit manual. Regards, S.Senthilkumar --- On Sun, 29/11/09, Nilesh Pathare <patharenil@gmail.com> wrote: From: Nilesh Pathare <patharenil@gmail.com> Subject: Re: [MW:3759] FW: CICB Painting facility and process qualification approval To: materials-welding@googlegroups.com Date: Sunday, 29 November, 2009, 9:18 AM Dear Mr. Hegde, To do the salt test on the blasted surface and prior to blasting kit is available in market.(Bressel's kit) There is a patch type thing which you paste on the surface. Then inject distiled water in it. Rub the patch water on the substrate. So the salt contain on the surface dissolved in water. And again suckout this water by injection. And test the salt contain with the digital instrument included in the KIT. Best Regards, Nilesh Pathare NDT Level III, CSWIP BGAS paint...

Boron can significantly increase the hardenability of steel without loss of ductility. Its effectiveness is most noticeable at lower carbon levels. The addition of boron is usually in very small amounts ranging from 0.0005 to 0.003 %; usually fastener steels contain boron for hardenability. Check hardness? Refer UG 10 if it is a div1 vessel “consideration should be given to making analyses for elements not specified in the specification but that would be deleterious if present in excessive amounts” May be you can ask the plate mill, what is excessive amount? From: Qamlr [mailto:qamlr@cicb-chemicon.com] Sent: Monday, November 30, 2009 2:35 PM To: materials-welding@googlegroups.com Subject: SA 516 GR 70 plates-Boron content- clarification   Dear All   As per the SA 516 GR 70, boron content is not specified and shall not be present as specified element. For SA 516 GR 70 plate  manufacturer certifies that this element is within per...

How do ripple like defects form in hot rolled pipes and which specification does it appear in? Umasankar -- 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, Have a good day Can somebody let me know where I can find the calculations for acceptance / rejection of Hydrotest when there is Pressure drop wrt Temp difference A quick respons would be beneficial S A Naik -- 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   As per the SA 516 GR 70, boron content is not specified and shall not be present as specified element. For SA 516 GR 70 plate  manufacturer certifies that this element is within permissible limit   Kindly give your suggestions to what basis we can certify for Coded vessels being constructed   Also kindly brief as to why the presence of boron and its affect??     Thanks in advance & r egards   Prashanth Hegde Head Quality   Please don't print this e-mail unless you really need to. ******************************************************************* This e-mail is confidential. It may also be legally privileged. If you are not the addressee you may not copy, forward, disclose or use any part of it. If you have received this message in error, please delete it and all copies from your system and notify the sender immediately by return e-mail. Internet communications cannot be guaranteed to be timely, secure, error...

Torque,in lb.ft=KDP/12   K=0.2 for finished bolts;0.22 for Zn Plated;0.3 for black;0.16 for Cd plated;0.15 to 0.18 for lubricated;0.10 for highly lubricated or waxed D=nominal dia of bolt in inches P=Bolt's desired load in Lbs(=75% of YSXArea) A,area=0.7854X Square of (D - 0.9743/n) n=no of threads pre inch; Coarse series(UNC) 1/2=13                               5/8=11                               3/4=10                               7/8=09 8UN series 1" onwards=8 Hope above information shall help Regards Aarpee On Sun, Nov 29, 2009 at 11:45 AM, Mrityunjay Kumar / ZS Saudi PEB QA/QC < Mrityunjaykumar@zamilsteel.com > wrote: Hi, Good morning, Can anybody tell me the formulae for Torque calculation (if load & area is provided for Anchor Bolts).       Thanks and Regards , M.K.Choudhary -------------------------------------------------------------------------------------------------------- Disclaimer: This email and any files transmitt...

Hi Sachin ,   Usually from the very first principles there are a few ways to avoid formation of chromium carbide at grain boundaries in austenitic stainless steels during welding :-   Use " L"grade typically C -0.03 or below Use stabilized grades e.g 316L (Mo stabilized), 321(Ti stabilized) or 347( Nb stabilized).   Both routes are acceptable from good welding and materials design perspectives. I am not sure what is the Ferrite Level (FN)asked at the fabrication stage. As per API-582, Minim Ferrite No (FN) for 347S.S is 5 FN while for the rest it could be as low 3FN . If you start off with higher ferrite no during fabrication for 321 or 347 clad, there may be chances of forming sigma phase after prolonged exposure.   You may forward your query to UOP on the rationale behind choosing 304L clad for FCC columns.   One Note Here:- NACE RP-170-2004-Talks about Polythionic Acid SCC in Refinery Equipments during maintenence shutdowns, which i...

Dear Sachin, I agree that this is the wrong material for this application because in this temperature range you will get Chromium carbides as well as Sigma fase present as precipitations on the grain bounderies which will influence the clad layers corrosion resistance. The material SS347 is a more common used metarial for high temperature application and is also often used at power plants because of its enhanced properties against creep. So for this aplication I would say this will be a much better choice, but depends also on the content of the equipment. Why did they choose 304L? When changing to 347 material you will have material with high carbon content, is this acceptable? Best regards, Herman Pieper On 28 nov, 16:47, "sachin sankhe" < sachin.san...@rediffmail.com > wrote: > Dear Freinds, > I have query on below subject > > We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Proce...

Dear Sachin, I think there might be some error in drawing or data sheet. Please write to client to clarify on this and seek conformance for 304L caldding.  2009/11/28 sachin sankhe < sachin.sankhe@rediffmail.com > Dear Freinds, I have query on below subject We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor However design temp of Main column is around 55o deg.C Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries. I feel UOP shall have specifed SS347. Kindly share your knowledeg Regards Sachin -- 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 thi...

Hi, Good morning, Can anybody tell me the formulae for Torque calculation (if load & area is provided for Anchor Bolts).       Thanks and Regards , M.K.Choudhary

Dear Mr. Hegde, To do the salt test on the blasted surface and prior to blasting kit is available in market.(Bressel's kit) There is a patch type thing which you paste on the surface. Then inject distiled water in it. Rub the patch water on the substrate. So the salt contain on the surface dissolved in water. And again suckout this water by injection. And test the salt contain with the digital instrument included in the KIT. Best Regards, Nilesh Pathare NDT Level III, CSWIP BGAS painting gr.2, Sharptest NDE & Inspection services, Mumbai. On Wed, Nov 25, 2009 at 12:04 PM, Qamlr < qamlr@cicb-chemicon.com > wrote: Dear All   Request your suggestions as to how we can carry out the salt contamination test on job before blasting.. If the salt is > 7 micro gram/cm, then we have to clean the entire surface with water jet . This is recommeded by our client as our manufacturing facility is close to coast.    Thanks & regards   Prashanth Hegde Hea...

In my opinion low carbon content of SS304L will help in avoiding carbide precipitation.   best regards.   Sunil Mathur On Sat, Nov 28, 2009 at 7:47 PM, sachin sankhe < sachin.sankhe@rediffmail.com > wrote: Dear Freinds, I have query on below subject We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor However design temp of Main column is around 55o deg.C Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries. I feel UOP shall have specifed SS347. Kindly share your knowledeg Regards Sachin -- 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 memb...

Dear Freinds, I have query on below subject We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor However design temp of Main column is around 55o deg.C Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries. I feel UOP shall have specifed SS347. Kindly share your knowledeg Regards Sachin -- 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!KC use the following process:for qlfn of pqr GTAW (root) :ER 80S-Ni1 SMAW :E7018-G PWHT as per UCS-56 ASME Sec VIII Div 1 After qulaification of PQR & WPS FOLLOW ug-84 for PTC requirements Rgds VG On Thu, Nov 26, 2009 at 4:02 PM, KC < kc.chavda07@gmail.com > wrote: Can anyone tell me  to weld  the below material with SMAW  which electrodes we have to use , to weld with SAW which filler wire & flux combination we have to use. The material and test requirement is as below…        Material is SA-537 Class 1, Fully Killed, Normalized, Charpy V- Impact Tested        Material is SA-516 Gr.70, Fully Killed, Normalized        Thickness varies from 38 mm to 50 mm for both materials. After complication of welding we have to test PTC (production test coupon) @ -48˚C (Negative 48). The impact energy value shell be 50 joule. -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding...

Hi! Prashant Please wash the steel surface & blast to obtain the required surface roughness. Then do salt test using Bressel's kit(it cost roughly 2000 dhirams). Thanks & Rgds Vg On Wed, Nov 25, 2009 at 12:04 PM, Qamlr < qamlr@cicb-chemicon.com > wrote: Dear All   Request your suggestions as to how we can carry out the salt contamination test on job before blasting.. If the salt is > 7 micro gram/cm, then we have to clean the entire surface with water jet . This is recommeded by our client as our manufacturing facility is close to coast.    Thanks & regards   Prashanth Hegde Head Quality CICB-Chemicon Pvt. Ltd Mangalore- INDIA   Please don't print this e-mail unless you really need to. ******************************************************************* This e-mail is confidential. It may also be legally privileged. If you are not the addressee you may not copy, forward, disclose or use any part of it. If you h...

Dear All, As you all know that TOFD needs a scanner. Can you pl.help me in identifying the best automatic motorized scanner for the same. We are using Veritech Sonomatic make Microplus 2 model TOFD machine. I believe that the scanners can be made compatible for any machine. Regards, Raghavendra Larsen & Toubro Limited www.larsentoubro.com This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. -- 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 c...

Flushing with abundant DM water is essential for cleaning after pickling and passivation.The presence of acid stains can be tested with litmus paper. regards M.S.R.K.Srinivasa Prasad Sr. Manager( Mech. Maint  PP-1) Nagarjuna Fertilizers And Chemicals Nagarjuna Road KAKINADA-533003 Ph: 0884-2360212(O)                  2379302(R) -- 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. Salvador   It is essential to clean the pickled and passivated (Acid cleaned) surface thoroughly by flushing with water.  Thereafter you may check the presence of acid using litmus paper. The suface should be clean and free from any embedments and rust.   Regards   Gopu --- On Wed, 25/11/09, Salvador, Camilo <cafsss@gmail.com> wrote: From: Salvador, Camilo <cafsss@gmail.com> Subject: [MW:3742] Re: Pickling and Passivation To: "Materials & Welding" <materials-welding@googlegroups.com> Date: Wednesday, 25 November, 2009, 4:21 PM How can i ensure that there's no residual acid on the surface? Visual inspection? What's the best method of cleaning post passivation? Most part of procedures are based on ASTM A-380, but this standard doesn't give us details about the "accept criteria" of passivation. Regards, On Nov 24, 4:43 am, "Bathula Raghuram (Mumbai - PIPING)" < R.Bath...@ticb.com > wrote: > Done mos...

E7018-1 with low hydrogen can do the job Dr. G. Dilintas I&F Regional Technical Manager Bureau Veritas Piraeus - Greece Tel: +30 210 40 63 113/4 Fax: +30 210 40 63 118

SMAW Air Liquide/Oerlikon Tenactito 38R for SMAW (E7018-G) Air Liquide/Oerlikon SD3 Wire/ OP121TT Flux for SAW Excellent low temperature impact test properties with 450MPa yield approx. Regards Robert -----Original Message----- From: KC [mailto: kc.chavda07@gmail.com ] Sent: 26 November 2009 12:03 To: Materials & Welding Subject: [MW:3750] Welding of SA 537 Can anyone tell me to weld the below material with SMAW which electrodes we have to use , to weld with SAW which filler wire & flux combination we have to use. The material and test requirement is as below…  Material is SA-537 Class 1, Fully Killed, Normalized, Charpy V- Impact Tested  Material is SA-516 Gr.70, Fully Killed, Normalized  Thickness varies from 38 mm to 50 mm for both materials. After complication of welding we have to test PTC (production test coupon) @ -48˚C (Negative 48). The impact energy value shell be 50 joule. -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe...

Can anyone tell me to weld the below material with SMAW which electrodes we have to use , to weld with SAW which filler wire & flux combination we have to use. The material and test requirement is as below…  Material is SA-537 Class 1, Fully Killed, Normalized, Charpy V- Impact Tested  Material is SA-516 Gr.70, Fully Killed, Normalized  Thickness varies from 38 mm to 50 mm for both materials. After complication of welding we have to test PTC (production test coupon) @ -48˚C (Negative 48). The impact energy value shell be 50 joule. -- 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 document...

How to prevent corrosion and pitting on above clad material. Is there any standard ( ASTM) for visual inspection of clad material.? Is it allowed to repair the corroded area on the clad in the above material which is bonded to base metal by hot roll bonding process. Pl.explain along with your experience while handling this material. Thanks for your time and efforts. Regards, Raghavendra Larsen & Toubro Limited www.larsentoubro.com This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. -- 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 an...

In general : check requirements towards weld metal for AISI 4130 joints : strength , hardness, charpy values In oil industry you can have requirements for high strength where B2 will fail. In oil industry you will have probably Nace requirements (max 22HRC) : you will need high PWHT temp to reduce HAZ hardness. Chary values at -46degrC ..?   AISI 4130 base metal can be ordered and supplied with high strength levels.   With kind regards, Erwin GERING   Van: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca] Verzonden: dinsdag 24 november 2009 23:29 Aan: materials-welding@googlegroups.com Onderwerp: FW: [MW:3727] ASME B31.3 unlisted materials      Hi John,   I have attached a spec for 4130 steel FYI. The summarized details are as follows:- §                 ASTM 519 Gr 4130—Nearest ASME Sec IX P No- 4. (typically ...

Hrishi To make it simple . ASME had introduced mandatory Procedures Qualifications for NDE in 2007 . These will have Essential variables akin to WPS in Welding Although Industry still did not get into this groove you may find the same in clauses referred by Pradip Regards Satish Kumar On 11/24/09, K.M Hrishikesan < hrishikm07@gmail.com > wrote: > Is it mandatory to demonstrate NDT procedure qualification before > applying in the actual job? If so, please give the code/standard reference. > > Regards > 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. ...

RP,Thanks,   Any one have idea about what will be cost difference incurred for HDG & Cadmium plating. and can we use Cadmium plating for bolts on high temp service (165ºC)   Thanks, ohm guru namasivaya --- On Wed, 11/25/09, Ramprasad Chari <ramprasad.chari@gmail.com> wrote: From: Ramprasad Chari <ramprasad.chari@gmail.com> Subject: Re: [MW:3739] Bolts/Nuts Material To: materials-welding@googlegroups.com Date: Wednesday, November 25, 2009, 3:15 PM I was referring coating of HDG/Cd Plating on CS bolts only i.e.a193GRB7 and not on B8 bolts which are ss.HDG/Cd plating shall not be any issue on A193B7 bolts. Regards Aarpee On Wed, Nov 25, 2009 at 11:41 AM, Ohm-Srinivasulu. K < nirgunaya@yahoo.com > wrote: RP,   Thanks, I should not deviate from company specs, what I can do is whether to approve the vendor proposal or not. on A193 GR. B8 HDG may not stick unless zinc penetrates the passive oxide film on SS Does A193 Gr...

Mr Hrishi, Please refer ASME Sec V T-150 which is self explainatory, I trust this clarifies ur queiry Regards, S A Naik ASNT Level-III (UT,RT,MT,PT,VT) API- 570, 510, 653 Certified Inspector ABS Group INC Dubai On Tue, 24 Nov 2009 18:59:16 +0530 wrote >Is it mandatory to demonstrate NDT procedure qualification before applying in the actual job? If so, please give the code/standard reference.   Regards 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. > -- To post to this group, send email to materials-welding@googlegrou...

Visit the AvestaPolarit welding website and download the free 20 page Pickling Handbook (dont worry; it also includes Passivation & Post cleaning). You will have no questions unanswered. Regards, [MW:3742] Re: Pickling and Passivation Salvador, Camilo to: Materials & Welding 11/25/2009 04:23 PM Please respond to materials-welding How can i ensure that there's no residual acid on the surface? Visual inspection? What's the best method of cleaning post passivation? Most part of procedures are based on ASTM A-380, but this standard doesn't give us details about the "accept criteria" of passivation. Regards, On Nov 24, 4:43 am, "Bathula Raghuram (Mumbai - PIPING)" <R.Bath...@ticb.com> wrote: > Done mostly for hygienic/aesthetic reasons, however a fine surface > finish is also crucial to corrosion resistance. SS is protected by a > thin chromium oxide layer mainly taking O2 from atmospher...

Sorry I didn't mention, for my previous mail  I refer ASME section V Edition 2007 addenda 2008 Regards Bharat B. Gole From: bharatgole@hotmail.com To: materials-welding@googlegroups.com Subject: RE: [MW:3731] NDT procedure qualification Date: Wed, 25 Nov 2009 16:48:14 +0530 If you refer ASME V  clause  T522.1,T721.2 & T621.2 for UT,MT & PT respectively then you will find that w hen procedure qualification is specified by the referncing code section( i.e construction code...ASME VIII, 31.3 etc ) , change of requirment in relevant table ( ASME V )identifed as an essential variable shall require requlification of written procedure by demonstration. Where as per ASME V clause T 221.2 for RT - Only demonstration of density & image quality requirements as per written procedure  on production or technique radiograph shall be considered satisfactory evidence of compliance of that procedure. Suppose if you are qualifying welder by radiography then even wr...