Materials & Welding

I think the set pressure is 3% above the test pressure.....Shank shailesh dave <snd2988@yahoo.com> wrote: DEAR Mr. RAGHURAM,   THANKS FOR THE REPLY.   REGARDS,   S.N.DAVE Raghuram Bathula <raghurambathula@gmail.com> wrote: When conditions require that a pressure test will be maintained for a period of time during which the testing medium in the system would be subject to thermal expansion, provision should be made for relief of excess pressure. I have no idea about any code requirement but normal practice as per my experience for Valve Setting Pressure is Test pressure plus lesser of 10 psi (0.69 Bar a) or 7% of the test pressure > From: shailesh dave [mailto:snd2...@yahoo.com] > Sent: Wednesday, January 30, 2008 1:46 PM > To: materials-welding@googlegroups.com > Subject: Re: [MW:537] Re: 533] Filler metal for P 11 (O/L SS 347) to P8 > > Dear Members, > > Can anybody tell me at what pressure of hydrotest be safety re...

Shwani, Hydrotest of bellow seal valve is carried out with bellows installed. The manufacturer do the low pressure air testing internally to ensure the welds in bellows are free from any leakage. Then the hydrotest of complete body including bellows will be undertaken. The valve is kept open and the bellows will be subject to external pressure. When conducting the seat closure test the bellow will not see the pressure.   Best Regards, Sanjay Gandhi desaid@toyoindia.com Sent by: materials-welding@googlegroups.com 31/01/2008 12:29 PM Please respond to materials-welding@googlegroups.com To piping_valves@yahoogroups.com cc materials-welding@googlegroups.com Subject [MW:542] Hydrotesting of Bellow Seal Valves Dears, Can any one inform how testing (hydro & pneumatic) of Bellow seal valves are generally carried out? Shell Test & seat test both. i.e. with bellows or without bellows? If there is some detailed procedure available o...

Dear All  In many cases forging and girth flanges having thickness more than 100mm are subjected to ultrasonic testing. Regarding this I have couple of queries. 1)      W hile considering hub type flange which thickness to  be considered for the requirement of ultrasonic testing (i.e. including Hub thickness or excluding hub thickness)? 2)      Is there any clause / reference to exempt the standard (ASME B16.5 & 16.47) flanges from ultrasonic testing ( If its thickness is more than 100mm)? Please post your reply/comments! BEST REGARDS NILESH WAGH EDTICB-MUMBAI STATIC-EQUIPMENT DEPT --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------...

Instead of 250X magnification on the specimen, where the vendors standard suggests 50X, 100X, 200X, 500X magnification only   What we are going to miss when we have 200X micro instead of 250X, or is it makes sense economically to go for 500X specimens?   ASTM A262 Practice E suggests the range of 100 to 250X, but the contractual obligation is 250X mandatory. Please share your views --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---

Dears, Can any one inform how testing (hydro & pneumatic) of Bellow seal valves are generally carried out? Shell Test & seat test both. i.e. with bellows or without bellows? If there is some detailed procedure available of reputed vendor then pls. send. Thanks & Regards, Dhwani Desai. --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---

Safety valve set pressure and system hydrotest pressure both are different concept.Safety valve set pressure is the maximum operating pressure for the particular system while in operation. Whereas the hydrotest pressure is meant to check the integrity of pipeline/vessel after fabrication/carrying modification & repair without using the process fluid. In general the safety valve set pressure is less than the system hydrotest pressure. In old practice hydrotest pressure will be 1.5 times the system design pressure and now it has been reduced to 1.3 times and IBR requirements will vary with ASME requirements. gopalsankar DM(INSPECTION) Raghuram Bathula <raghurambathula@gmail.com> wrote: When conditions require that a pressure test will be maintained for a period of time during which the testing medium in the system would be subject to thermal expansion, provision should be made for relief of excess pressure. I have no idea about any code requirement but normal practice a...

DEAR Mr. RAGHURAM,   THANKS FOR THE REPLY.   REGARDS,   S.N.DAVE Raghuram Bathula <raghurambathula@gmail.com> wrote: When conditions require that a pressure test will be maintained for a period of time during which the testing medium in the system would be subject to thermal expansion, provision should be made for relief of excess pressure. I have no idea about any code requirement but normal practice as per my experience for Valve Setting Pressure is Test pressure plus lesser of 10 psi (0.69 Bar a) or 7% of the test pressure > From: shailesh dave [mailto:snd2...@yahoo.com] > Sent: Wednesday, January 30, 2008 1:46 PM > To: materials-welding@googlegroups.com > Subject: Re: [MW:537] Re: 533] Filler metal for P 11 (O/L SS 347) to P8 > > Dear Members, > > Can anybody tell me at what pressure of hydrotest be safety relief valve set. What is the reference code. > > Regards, > > S.N.Dave > > QA/QC Manager > > ...

When conditions require that a pressure test will be maintained for a period of time during which the testing medium in the system would be subject to thermal expansion, provision should be made for relief of excess pressure. I have no idea about any code requirement but normal practice as per my experience for Valve Setting Pressure is Test pressure plus lesser of 10 psi (0.69 Bar a) or 7% of the test pressure > From: shailesh dave [mailto:snd2...@yahoo.com] > Sent: Wednesday, January 30, 2008 1:46 PM > To: materials-welding@googlegroups.com > Subject: Re: [MW:537] Re: 533] Filler metal for P 11 (O/L SS 347) to P8 > > Dear Members, > > Can anybody tell me at what pressure of hydrotest be safety relief valve set. What is the reference code. > > Regards, > > S.N.Dave > > QA/QC Manager > > --------------------------------- > Never miss a thing. Make Yahoo your homepage. --~--~---------~--~----~------------~-----...

Dear Mr Dave Could you please resend this query with proper subject line? And also in future please don't hit reply button while starting new thread, instead u can create new mail and send to materials-welding@googlegroups.com   Best regards Raghuram Bathula From: shailesh dave [mailto:snd2988@yahoo.com] Sent: Wednesday, January 30, 2008 1:46 PM To: materials-welding@googlegroups.com Subject: Re: [MW:537] Re: 533] Filler metal for P 11 (O/L SS 347) to P8   Dear Members,   Can anybody tell me at what pressure of hydrotest be safety relief valve set. What is the reference code.   Regards,   S.N.Dave   QA/QC Manager   Never miss a thing. Make Yahoo your homepage. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googleg...

This is a typically rare case. You may follow as follows: 1) Buttering on P-11 material by inconnel (ENiCrFe-3 is the most economical). Minimum thickness should be 4.8 mm. 2) PWHT of the buttering. (Local PWHT is desirable if whole bonnet is not subject PWHT) 3) Welding of LWN nozzle (I suppose it will be set-on type) onto the buttering. (Be careful not to touch the base metal P-11 during the final welding) If it is not practicable or if process/project specifications allow indexcriminate PWHT of the SS 321 material, you may avoid buttering (step-2 above) By the way, what is the design temperature for the Tube-side? (There is also a restriction in code for inconnel filler.) Best regards, Prasad Joshi e-mail: pjoshi@technip.com Phone: +971-(0)2-611-6643 gopal sankar <gopalsankar@yaho ...

In the above query the thickness of weld neck & nozzle has not been mentioned and assume that the connection is between the nozzle pipe & weld neck flange.If there is no PWHT as per design requirements then root  as well as final pass welding can be carried out using ER347 +E347 due to homogeneuous layer present. Welding final layer with Inconel will not give have any positive impact rather the chance pf cracking is not ruled out due to differential thermal expansion of P11+SS347+Inconel.Either full welding with 347 or Inconel will be a better option.   with regards, gopalsanakr DM(ES-Inspn) CPCL Chennai "Bathula Raghuram (Mumbai - PIPING)" <R.Bathula@ticb.com> wrote: Is this vessel subjected to PWHT? I assume it should be, also assuming it is a stub in type connection, then use ER347 + E347  for joining weld overlay portion to LWN (i.e inside weld of nozzle), and may use Inconel consumables ERNiCr3+ENiCrFe-2/3...

Dear Prasad/ Raghu, First, let me thank you for your valuable input.   Reference to my original query [MW:497], please find attached brief summery presented to client.   This is for reference for all.   Best regards,   Sunil S. Agrawal From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pjoshi@technip.com Sent: Saturday, January 19, 2008 1:24 PM To: materials-welding@googlegroups.com Subject: [MW:504] Re: 500] RE: 497] Ferrite content limitation for SS316L -URGENTMATTER!!   Dear sunil,   In general, the issue of ferrite content limitation is related to the preventive measures and i many cases, the conservative approach by the client based on some qualitative results during research. I would try to give some information so that your argument to dilute the client requirement may be fruitful.   In general, the ferrite content in weld metal depends on the c...

Is this vessel subjected to PWHT? I assume it should be, also assuming it is a stub in type connection, then use ER347 + E347  for joining weld overlay portion to LWN (i.e inside weld of nozzle), and may use Inconel consumables ERNiCr3+ENiCrFe-2/3 for weld on ouside (i.e fillet joining P11 to F321 neck) From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Desai Jignesh Sent: Tuesday, January 29, 2008 2:46 PM To: materials-welding@googlegroups.com Subject: [MW:533] Filler metal for P 11 (O/L SS 347) to P8   Dear Member,   Can some body give his/her opinion for filler metal of following condition?   Branch connection (Tube Side) between LWN flange (Material SA 182 F321) to SR Nozzle (SA 182 F11 CL 2 + Weld Deposit 347 SS).   Service is Hydrogen.   Operating Wall Temperature - Tube Side i...

Dear Member,   Can some body give his/her opinion for filler metal of following condition?   B ranch connection  (Tube Side) between LWN  flange (M aterial  SA 182 F 321)  to  SR N ozzle ( SA 182 F11 CL 2 + Weld D eposit 347 SS ).   Service is Hydrogen.   Operating Wall Temperature - Tube Side is IN 372° C & Out 225° C.   A lso recommend the filler metal for the first layer of weld deposite.   Thanks in advance   Jignesh --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---

Dear Mr. S.K. Agarwal,   In general, the basic criteria should be ease of use, ability to work with your exisiting microscope, help in trainining the staff on use of the software as well the features and scalablity that this software can provide.   Without being a "salesperson", let me highlight the Microstructure Image Analysis software we sell in India. Please visit http://www.tcreng.com/products/laboratory-software/microstructure-characterizer/  to know mroe about this software.   Should you be interested, click on the "contact us" form on our website and send us the inquiry.   Regards Rohit Bafna Director TCR Engineering Services On Jan 23, 2008 5:31 PM, SATYENDRA KUMAR AGRAWAL < satyagrawal@gmail.com > wrote: Dear Sir, What should be the criterian for selection of an Image Analysis Software, when cost is secondary consideration? --  S K Agrawal --~--~---------~--~----~------------~-------~--~----~ To post to...

Tensile Strength (Approximation) An approximate relationship between the hardness and the tensile strength (of steel) is, TS(Mpa)=3.55*HB (HB=<175) else 3.38*HB (HB>175) TS(Psi)=515*HB (HB=<175) else 490*HB (HB>175) where HB is the Brinnell Hardness of the material, as measured with a standard indenter and a 3000 kgf load. Hardness Symbol Amount Name Suggested Range HB (3000) 408 Brinell 10 mm Standard 3000 kgf 80~445 HB (500) >> Brinell 10 mm Standard 500 kgf 89~189 HB (Tungsten 3000) 408 Brinell 10 mm Tungsten 3000 kgf 80~620 HB (...