[MW:17493] PWHT for CS weld in NaoH service

Dear Experts,   Any idea or ref. for using CS without PWHT of piping welds with NaoH service? The process fluid is almost 50% NaoH and design temp. of 82 Deg.C , operating temp. @35 Deg.C. Now the issue is by using rubber lining on ID side of piping, still PWHT is required for CS welds? Any literature available for NaoH service and CS materials?   Regards,   Manish Kulkarni   --- On Sat, 13/4/13, pgoswami <pgoswami@quickclic.net> wrote: From: pgoswami <pgoswami@quickclic.net> Subject: RE: [MW:17360] RE: 17261] Welding of E316L material -Reg To: materials-welding@googlegroups.com Date: Saturday, 13 April, 2013, 9:15 AM Mr. Pandithan,   My Opinion as follows:-     C is 0.04% Max for SMAW electrodes. The Ferro alloys added through the flux also contributes "C" in the weld. If required electrode manufacturers could  formulate welding electrodes , with max "C"  below 0.04%, but it would be costly.   For GTAW filler, the chemical composition of the wire = the chemical analysis of the weld puddle. No alloys are added separately, except that alloys could be lost through turbulence or improper shielding. Hence achieving base filler with Max "C" of 0.03% is very practical, with the available stainless manufacturing routes.   Hence thinking all the pros and cons  the  above suggested limits   are  agreed on by  ASME  Sec-II ,Pt-C Code committee.   Perhaps  some  opinions from   consumable manufacturing industries would be appreciated.   Thanks   Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist Ontario , Canada . Email-pgoswami@sympatico.ca, pgoswami@quickclic.net   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kannayeram gnanapandithan Sent: Thursday, April 11, 2013 8:01 AM To: materials-welding Subject: Re: [MW:17352] RE: 17261] Welding of E316L material -Reg Dear Experts/Mr Goswami In TIG welding rod ER316L, carbon is kept at max 0.03, In SMAW welding electrode E316L, carbon is kept at max 0.04 in all LOW Carbon electrodes. What is logic behind it Generally for Carbide formation, minimum carbon require is 0.04 Pandithan Welding Consultant On Tue, Apr 2, 2013 at 2:36 PM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote: As per SFA 5.9,   C is max .03% for ER 316L,, in this case what should be done? Pandithan Welding Consultant On Tue, Apr 2, 2013 at 8:14 AM, pgoswami <pgoswami@quickclic.net> wrote: Hi Siva,   If the intended service for S.S 316L is for corrosive environments , then the answer is NO.   Like base metals , welding consumables for SS 316 could be manufactured as "Dual Certified Grades". Example as per SFA 5.4 For E-316-XX-- Maxm "C" allowed is -0.08% For E-316L-XX-- Maxm "C" allowed is -0.04% If the electrode manufacturer " Restricts C to  0.04%, yet the  all mechanical test as per SFA 5.4  are passed, then  this grade could be certified as "Dual Certified Grade" , e.g -  E316/E316L-XX. Please check this point with electrode supplier. If the answer is yes then welding consumable certified as  E316/E316L-XX, are safe to use for welding S 316L.  However the consumable must meet any corrosion test, say ASTM A-262 Practice E, if required.   Hope this will guide you well to cope with the problem.   Thanks.   Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist Ontario, Canada. Email-pgoswami@sympatico.ca, pgoswami@quickclic.net   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of siva subramanian Sent: Monday, April 01, 2013 11:02 AM To: materials-welding@googlegroups.com Subject: [MW:17261] Welding of E316L material -Reg Dear sirs,                  I have one clarification regarding welding of SA240 GR 316L material. May I use E316-16 to weld 316L material.If it is not possible means What is reason behind? Please Clarify me. Always Thankful, A.Sivasubramanian -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com. 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