Materials & Welding

Dear All, Can anybody tell me why NACE Recommends Low Hardness Materials ( ASTM A193B7M and A194 2HM) for Bots and Nuts Since Bolts & Nuts are not at all coming in contact with the Corrosive Fluid. Thanks & Regards Vineeth Thomas Piping Engineer -- 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.

Thanks for the inputs.   We don't want internal firing to be used. All our suppliers agreed for doing PWHT in enclosed furnace before order.   Now they have problems in finding furnces for doing PWHT. We are trying with Cooperheat for their solution.   BR Suresh On Sat, Jul 31, 2010 at 9:58 PM, Chaitanya Purohit < chaitanya_purohit@yahoo.co.in > wrote: Its all depends ; - Experience of person / company responsible (carrying out) PWHT in modular furnace - Construction of modular furnace (proper and enough insulation to prevent heat loss - how accurately one can build furnace without any openings / leakage (except opening with damper to control the air flow / exhaust) - Nos of burner and burner location - Circulation of hot air (again no of burner and location and blower capacity/position is important) - Placement and Nos of thermocouple (thin / thick parts will have variation of 20 -80 deg C difference If all the care taken for the above points then you can consid...

Guys, Could anyone inthis group clarify whether is it required to do Impact testing for welding repair procedure qualification.Normally we do Tensile,bend,. Here for API 5L PSL1 pipes we have already WPS/PQR with out Impact,so is it acceptable as per ASME SEC.IX REGARDS, KK -- 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;   I had a question regarding minimum butt weld joint?   Is there any code mentioning that NPS 2 & above shall be butt weld joints & less than 2” socket weld?   Please advice?   Regards Majdi

Good Day , could you please give the information regarding lifting inspector training  in India regards Santosh -- 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,plz elaborate ur requirements for 10-6 mbar. On 7/31/10, Devang Patel < devangp@inoxindia.com > wrote: > Does anybody have a technical information about Vacuum Chamber(1x10-6 mbar)? > > Regards, > Devang Patel | Sr. Manager Engineering > Inox India Ltd. | 4th Floor, ABS Tower, Old Padra Road, Vadodara. Guj. > India. > Voice: + 91-265-3056100 ext. 392 | Fax: +91-265-2341449 | Mobile: +91 > 9879803401 > Email: devangp@inoxindia.com | web: www.inoxindia.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 doc...

Its all depends ; - Experience of person / company responsible (carrying out) PWHT in modular furnace - Construction of modular furnace (proper and enough insulation to prevent heat loss - how accurately one can build furnace without any openings / leakage (except opening with damper to control the air flow / exhaust) - Nos of burner and burner location - Circulation of hot air (again no of burner and location and blower capacity/position is important) - Placement and Nos of thermocouple (thin / thick parts will have variation of 20 -80 deg C difference If all the care taken for the above points then you can considered modular furnace as good as permanent and go ahead without any hesitation. -  Thickness of part vessel to be heat treated (as the curnace efficiency will not be same as permanent furnace, time to penetrate thickness may take more time (1-1/2 hrs for 30 -50 mm thick material   In my opinion, internal firing would be better option with better controls if not much inter...

Does anybody have a technical information about Vacuum Chamber(1x10-6 mbar)?   Regards, Devang Patel | Sr. Manager Engineering Inox India Ltd. | 4th Floor, ABS Tower, Old Padra Road, Vadodara. Guj. India. Voice: + 91-265-3056100 ext. 392 | Fax: +91-265-2341449 | Mobile: +91 9879803401 Email: devangp@inoxindia.com | web: www.inoxindia.com

Dear Mr. Rao The sentence is not fully correct. PWHT is sometimes required on Austenitic Stainless steel. Simple rule, any material subjected to lethal sevice designated by ASME Sec viii div-01 UW-02, will undergo PWHT. PWHT is not required because , Cr will form Cr carbide which will cause sensitisation & reduce corrosion resistance. High temp can cause this problem, so PWHT is recommende with less temp. PWHT is seldom required to avoid stress corrosion cracking. Thermo-mechanical properties of welds in stainless steel is substantially improved by the implementation of a post weld heat treatment that iliminates sigma phase in the heat treated zone and favors niobium carbonitride precipitate formation in a desirable size range. In most cases, post weld heat treated material can be employed in pressurized devices at temperatures exceeding 550° C., which is currently regarded the upper safe temperature limit, and material according to the inventive subject matter was ...

What is the suitable joint design (single V, square, bevel, ........)  for plate SA-283 Gr.B (S235JR) as the thickness is 6mm and the processes used is GMAW/FCAW+SAW

It is means that if the welder make a weld with thikness below 13 mm Thk. he will be qualified aore duble thikness he weld for example if he weld thickness 9.53 mm he will be qualified up to 19.06 mm, but if he make a test in thikness for 13 mm and above he well be qualified for unlimited thikness for example if he make a test in 14.27 mm he will be qualified for unlimited thikness. Best regards --- On Wed, 7/28/10, naveen < dnkuit@gmail.com > wrote: > From: naveen < dnkuit@gmail.com > > Subject: [MW:6173] Welder Qualification-Thickness range > To: "Materials & Welding" < materials-welding@googlegroups.com > > Date: Wednesday, July 28, 2010, 8:03 PM > Can you explain in detail regarding > in SEC IX - QW452.2? > Welder thickness range for unlimited thickness?we are > confused?With > example please? > > -- > To post to this group, send email to materials-welding@googlegroups.com > To unsubscribe from this group, send ...

Dear Folks, Can some one clarify what is Painting Service Plan for Off-Shore (above water) Painting Maintenance contract. If some one has sample for model Plan please share. -- With Regards, Mohan, Q8. -- 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.

Yes sir, i need thickness range only,ex.test coupon 25mm,gtaw 2 pass 7mm,smaw 18mm completed.what is qualified range? Note:WQT qualfying based on WPS,wps thick range 5-20mm. so can you explain? On Jul 28, 9:38 pm, "Potter, Richard" < RPot...@itses.com > wrote: > I think your reference may be wrong. Please look at QW-453 "PerformanceQualificationTesting". > > > > -----Original Message----- > From: materials-welding@googlegroups.com > > [mailto: materials-welding@googlegroups.com ] On Behalf Of naveen > Sent: Wednesday, July 28, 2010 12:04 PM > To: Materials & Welding > Subject: [MW:6173]WelderQualification-Thickness range > > Can you explain in detail regarding in SEC IX - QW452.2?Welderthickness range for unlimited thickness?we are confused?With > example please? > > -- > To post to this group, send email to materials-welding@googlegroups.com > To unsubscribe from this group, send email to > mate...

Gents, Good morning, Can anybody exaplain in details, solution annealing? Thanks and regards. John On Sat, 31 Jul 2010 08:02:54 +0530 wrote > Mr Hegde, Inconel 690 (UNS N06690) is an all austenitic alloy which is covered under Sec-II Part-B,SB-163. Krupp Nicrofer 6030 is the product of Thyssen Krupp VDM,one of the key players for this type of alloy products. Although being austenitic,Inconel 690alloy have fairly high UTS and could work harden considerably while cold bending. Hence manufacturer recommends post forming heat treatment as follows:- Cold working:- For cold working the material should be in the annealed condition. Nicrofer 6030 has a higher work-hardening rate than austenitic stainless steels. This should be taken into account when selecting forming equipment. Interstage (Intermediate) annealing may be necessary with high degrees of cold forming. After cold working with more than 10% deformation soft or solution annealing is required before...

  Mr Hegde,   Inconel 690 ( UNS N06690) is an all austenitic alloy which is covered under Sec-II Part-B,SB-163.  Krupp Nicrofer 6030  is the product of Thyssen Krupp VDM     ,   one of the key players for this type of alloy products . Although being austenitic,   Inconel 690  alloy have fairly high UTS and  could work harden considerably while cold bending. Hence manufacturer recommends post forming heat treatment as follows:-   Cold working:- For cold working the material should be in the annealed condition. Nicrofer 6030 has a higher work-hardening rate than austenitic stainless steels. This should be taken into account when selecting forming equipment. Interstage (Intermediate) annealing may be necessary with high degrees of cold forming. After cold working with more than 10% deformation soft or solution annealing is required before use . Soft annealing of Nicrofer 6030 should be carried out in t...

  Hi Subrata,   Generally, Hastelloy C -276 alloy is  furnished in the solution heat-treated condition unless otherwise specified. C-276 alloy is normally solution heat treated at 2050°F (1121°C) and rapid quenched.   Parts which have been hot-formed should be solution annealed prior to final fabrication or installation, if possible.   ASME specifications for Hastelloy:-C-276 alloy plate, sheet, strip, bar, tubing and pipe are SB-574, SB-575, SB-619, SB-622 and SB-626 under UNS number N10276. General thumb rule for this alloy is to be supplied in Solution Annealed condition, to ensure highest corrosion resistance and the best mechanical properties.   Thanks   Pradip Goswami,P.Eng. Welding & Metallurgical Engineer/Specialist Email-pgoswami@ sympatico.ca , pgoswami@quickclic.net   www.opg.com     From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of s...

Dear all, thanks for your reply. these are defects identified by inspection team. 1. Fixed Roof - Remove the weld defects from the roof to shell angle and repair 2. Fixed Roof - Remove the weld defect from the butt weld adjoining Plates 3. Bottom - Puddle weld or install a lap-welded patch plate over the 0.150 inch deep internal pit on the sump bottom plate. 4. Bottom - Remove the corroded manual gauge repad/striker plate, Regards, Vijay. On Fri, Jul 30, 2010 at 2:28 AM, ahmmad ali mohammed < ali47.alisha@gmail.com > wrote: Dear Vijay   you are not given clear details about the location and type of repaire. generally the following steps to be follow--- first thing is to ensure the type and depthe of defect by ndt methods as per site conditions. if a repaire is crack drill at the both ends of crack to prevent further propgation of crack  during grinding. remove the defect by grinding only(gas cutting is not allowed). after grinding ensure compleat removal of crack/slag ...

No probblem at all. When you use Modular furnaces , look at the whether it is electrical heated or fuel fired. Electrical has nothing to worry. If it is fuel fired,  place additional temp recorders (thermo couples) on the vessel portion nearer to burner. Burner may be provided wioth deflector or burner direction need to be examined so that no hot spots develop. Simialrly farthest portion of vessel will have thermo couples in line with ASME guidelines. As such I do not forsee any problem. Tagore On Fri, Jul 30, 2010 at 6:48 AM, suresh venkat < atozsuresh@gmail.com > wrote: Dear all,   we have several equipments of diameter 5mts & above & length 30 mtrs & above. Our specs calls for PWHT in an enclosed furnace.   some of our fabricators expressed inability due to furnace size restrictions& informed us that use of Temporary Modular furnaces will pose risk to Quality of final product.   I need your advice on the following   1. Is doing PWHT in modular...

sent from my handheld -----Original Message----- From: suresh venkat Sent: 30/07/2010 5:18:22 pm Subject: [MW:6205] PWHT of Bigger diameter & Long vessels Dear all, we have several equipments of diameter 5mts & above & length 30 mtrs & above. Our specs calls for PWHT in an enclosed furnace. some of our fabricators expressed inability due to furnace size restrictions& informed us that use of Temporary Modular furnaces will pose risk to Quality of final product. I need your advice on the following 1. Is doing PWHT in modular furnaces will create any problems to the equipment (in terms of quality) 2. can the temperature be properly controlled 3. Pwht can be performed properly without overheating or Under heating. thanks Suresh -- 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.bl...

No problem with modular fc wehave carried pwht of 25 mt vessel n 250 t. Regards. Hegde Sent from my BlackBerry® smartphone from !DEA From: suresh venkat <atozsuresh@gmail.com> Sender: materials-welding@googlegroups.com Date: Fri, 30 Jul 2010 20:48:22 +0900 To: <materials-welding@googlegroups.com> ReplyTo: materials-welding@googlegroups.com Subject: [MW:6205] PWHT of Bigger diameter & Long vessels Dear all,   we have several equipments of diameter 5mts & above & length 30 mtrs & above. Our specs calls for PWHT in an enclosed furnace.   some of our fabricators expressed inability due to furnace size restrictions& informed us that use of Temporary Modular furnaces will pose risk to Quality of final product.   I need your advice on the following   1. Is doing PWHT in modular furnaces will create any problems to the equipment (in terms of quality) 2. can the temperatu...

Dear all, could anybody advise if Nb content level can cause weld cracking in service? thank you in adnvacne Best Regards Klara -- 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.

Complete bevel provided by mfr. to be filed (crotch). You may search earlier messages in the group on this subject. sent from my handheld -----Original Message----- From: mubarish muhammed Sent: 30/07/2010 4:56:32 pm Subject: [MW:6203] Weld-o-let welding minimum fillet size requirement Header pipe thickness is 41mm weldolet thickness 23mm , but other side of weld-o-let 6mm. Please give me minimum weld metal for header to weld- o-let joints whether we can weld less than 23mm & if going like how much minimum fillet length required. Mohd Mubarish.P.M Abu Dhabi. Welding Engineer. CSWIP-3.1 -- 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 decisio...

Dear all,   we have several equipments of diameter 5mts & above & length 30 mtrs & above. Our specs calls for PWHT in an enclosed furnace.   some of our fabricators expressed inability due to furnace size restrictions& informed us that use of Temporary Modular furnaces will pose risk to Quality of final product.   I need your advice on the following   1. Is doing PWHT in modular furnaces will create any problems to the equipment (in terms of quality) 2. can the temperature be properly controlled 3. Pwht can be performed properly without overheating or Under heating.   thanks   Suresh -- 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, Use...

Header pipe thickness is 41mm weldolet thickness 23mm , but other side of weld-o-let 6mm. Please give me minimum weld metal for header to weld- o-let joints whether we can weld less than 23mm & if going like how much minimum fillet length required. Mohd Mubarish.P.M Abu Dhabi. Welding Engineer. CSWIP-3.1 -- 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.

I suppose you mean ASTM G 48 -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of PB HEGDE Sent: Friday, July 30, 2010 9:45 AM To: materials-welding@googlegroups.com Subject: [MW:6195] RE: 6187] Test for PQR of Super Duplex Stainless steel plate UNS32750 In addition to ASME sec IX requirement it is better to qualify as per GS8 specification Regards Hegde P.B. -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of yusufkhan pathan Sent: Thursday, July 29, 2010 3:32 PM To: Materials & Welding Subject: [MW:6187] Test for PQR of Super Duplex Stainless steel plate UNS32750 Dear all, I have to prepare a PQR with GTAW+SMAW for Super duplex SS Plate of UNS 32750 of thickness 8mm. Please suggest me the type and references of test to be conducted for the specimen as per ASME SecIX. Thanks in advance. Regards. Yusufkhan +91-9916008202 Filtered b...

Dear All,   I have one electrode test certificate of E6013 size 2.5 mm of HONAVAR ELECTRODES PVT. LTD. I have some query on it 1)In sec II part-C SFA 5.1 there is mention that not specified for P,S etc so what is the max.limit of these elements like P,S?   2)I have same manufacture other TCs Certified by QA/QC manager but this certificate is not. Can we demand for this? only signed by preparer.Can we accept this?   3)Pl. let me know what is basic requirement for review TC of electrode or filler wire?   Thanks, With Best Regards, Ramesh Barot

dear sir,            SS materials have problem of carbide precipitation after PWHT, which detrimental to the very basic nature or use of SS material. 2010/7/29 rao < amma0509@gmail.com > dear sir why we are not doing pwht in ss materials please explain the reason -- 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. -- K Harish Kumar, -- 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....

Dear all Kindly share your opinion about the heat treatment procedure for SB622 UNS N10276 Nickel Alloy Steel Pipe/Fittings ?     Regards Subrata Das

Dear Mr. Manish, PMI (Positive Material Identification) is method to segregate / identify the particular material from the lot at the source / storage / before welding and during service also, without destructing it. Presently, Portable X - Ray Fluorescence or Optical Emission Spectra Analyzers are widely used for PMI. Rather they become the identity of PMI testing. Hence, it is to be noted that,  these are one of the method for material identification without destructing it. These machines, normally handy instruments gives the chemical composition of the material, at any point of time. You can refer various instruments manufacturers(eg. oxford, Metorex etc)  website for further details, limitation of testing and operation details. PMI testing is normally asked by process licenser, consultant, client in order to avoid the mix of material (in other word to identify the positive material ) in lot. Therefore, it is independent of  type of material. With Best Rega...

Dear all,   In these cases, when you need to quantify C, S, P, Mn, and Si then you need to use PMI technique utilizing the portable optical emission spectrometer. Arcmet 8000 which we have is a good equipment to undertake such tests at site in a non destructive manner.   Regards, Rohit Bafna Director - Global Sales   ------------------------------------------ TCR Engineering Services (India) TCR Arabia (KSA), TCR Kuwait TCR Consulting FZC (UAE) TCR Africa (RSA) TCR World Inc. (USA) Tel: +91-983-353-0400 www.tcreng.com Material Testing | Consulting | Inspection | NDT Services -------------------------------------------   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Manish.Maheta@Linde-LE.com Sent: Thursday, July 29, 2010 11:02 PM To: materials-welding@googlegroups.com Subject: Re: [MW:6195] why we are not doing positive material identification in carbon steel materi...

In addition to ASME sec IX requirement it is better to qualify as per GS8 specification Regards Hegde P.B. -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of yusufkhan pathan Sent: Thursday, July 29, 2010 3:32 PM To: Materials & Welding Subject: [MW:6187] Test for PQR of Super Duplex Stainless steel plate UNS32750 Dear all, I have to prepare a PQR with GTAW+SMAW for Super duplex SS Plate of UNS 32750 of thickness 8mm. Please suggest me the type and references of test to be conducted for the specimen as per ASME SecIX. Thanks in advance. Regards. Yusufkhan +91-9916008202 -- 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...

  Carbon, Silicon, Sulfur, and Phosphorous are very light elements and it is not possible to quantify such as elements by performing PMI.   Jigneshbhai ,your concurrence is requested for subject matter. Regards, Manish rao <amma0509@gmail.com> Sent by: materials-welding@googlegroups.com 29/07/10 22:10 Please respond to materials-welding@googlegroups.com To "Materials & Welding" <materials-welding@googlegroups.com> cc Subject [MW:6193] why we are not doing positive material identification in         carbon steel materials dear sir why we are not doing positive material identification in carbon steel materials please explain it -- 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 vi...