Materials & Welding

Dear Mr.Satish   You may give a go ahead by considerably increasing the holding time, could be double the time specified by the spec while you also consider other factors of safety and design.   Regards   J.N.Murthy Engg.QA/QC. On Thu, Sep 30, 2010 at 2:47 PM, Satish Hingalkar < shingalkar@gmail.com > wrote: Hi,   Thanks a lot, i search in ASME B31.3 below bold sentence,but i couldn't find,can u please help me for this.,where it is exactly so that i can decline this deviation.   Please help me if possible uregently because my PM pressuring me to reply that will be appreciated.   Waiting for reply.   Regards, Satish On Thu, Sep 30, 2010 at 1:33 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: Interesting, and you have a valid point but nothing is proven, until then just go with the flow (tried and tested methods). No Inspector would be happy but bound to accept as per code.  remember your company specification prohibits i...

Satish ,   What code you followed ?   If you followed ASME 31.3 , you  MAY be  full painted as per paint spcification before hydrotest . So it is matter of betweenContractor and Client agreement .   If contractor wish to do , he can ......but contractor need get a permission from client .   Suresh   91 92  92 905 905 On Wed, Sep 29, 2010 at 11:55 PM, Satish Hingalkar < shingalkar@gmail.com > wrote: Dear Members,   Our contractor has raised a design change request for painting prior to hydrotest.As per COMPANY specification,painting to be carried out after successfull complection of hydrotest,but contractor wants to do painting before hydrotest,can we accept this deviation? if  we want to accept the deviation,what criteria to be follow??   Our design conditions are 105 barg hydrotest pressure and design temp.85 deg.c,NDT is 10% MT & 10% RT.   Waiting for reply.Pl.respond ASAP.   Regards, Satish -- To post to this group, send email to materials-weldi...

Dear friends,  What is Heat No. and Lot No. Thanks and regards VK.Bhuvan -- 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 Satish,   I dont thing that any paint could resist a hoop stress than steel, the only issue regarding paint and hidrotest that i can find is curing time (if paint is internal).   Hope to be helpful.   Alexis   Date: Thu, 30 Sep 2010 14:47:21 +0400 Subject: Re: [MW:7287] Can we do painting prior to hydrotest? From: shingalkar@gmail.com To: materials-welding@googlegroups.com Hi,   Thanks a lot, i search in ASME B31.3 below bold sentence,but i couldn't find,can u please help me for this.,where it is exactly so that i can decline this deviation.   Please help me if possible uregently because my PM pressuring me to reply that will be appreciated.   Waiting for reply.   Regards, Satish On Thu, Sep 30, 2010 at 1:33 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: Interesting, and you have a valid point but nothing is proven, until then just go with the flow (tried and tested methods). No ...

Hai,      Please refer B 31.3 - 345.3.1 preparation for leak test --- On Thu, 9/30/10, Satish Hingalkar <shingalkar@gmail.com> wrote: From: Satish Hingalkar <shingalkar@gmail.com> Subject: Re: [MW:7287] Can we do painting prior to hydrotest? To: materials-welding@googlegroups.com Date: Thursday, September 30, 2010, 4:17 PM Hi,   Thanks a lot, i search in ASME B31.3 below bold sentence,but i couldn't find,can u please help me for this.,where it is exactly so that i can decline this deviation.   Please help me if possible uregently because my PM pressuring me to reply that will be appreciated.   Waiting for reply.   Regards, Satish On Thu, Sep 30, 2010 at 1:33 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: Interesting, and you have a valid point but nothing is proven, until then just go with the flow (tried and tested methods). No Inspector would be happy but bound to accept as per code. ...

http://www.eng-tips.com/viewthread.cfm?qid=117764&page=148 http://www.eng-tips.com/viewthread.cfm?qid=108365&page=160 http://www.onetb.com/forum/painting-before-hydrostatic-testing-t1742.html FYI: From time to time, questions are asked regarding painting or coating of a pressure vessel or even a pressure retaining item prior to hydrotesting. I was forwarded this interesting article that was published in Materials Evaluation, September, 1993. The article is titled " Don't Paint Before Hydrostatic Testing" and is authored by Jon Batey. To summarize, the author explains how the various construction codes and in-service repair codes like the NBIC are either silent or briefly mention caution on the issue of painting or coating before hydrostatic testing. Several tests were actually conducted on a 4" Schedule 40 carbon steel pipe that was internally pressurized with specific hold times at 1100 (30 min), 2000 (10 min) and 2400 psig (5 min). The pressure was incr...

Hi,   Thanks a lot, i search in ASME B31.3 below bold sentence,but i couldn't find,can u please help me for this.,where it is exactly so that i can decline this deviation.   Please help me if possible uregently because my PM pressuring me to reply that will be appreciated.   Waiting for reply.   Regards, Satish On Thu, Sep 30, 2010 at 1:33 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: Interesting, and you have a valid point but nothing is proven, until then just go with the flow (tried and tested methods). No Inspector would be happy but bound to accept as per code.  remember your company specification prohibits it and you are intended to accept, hence code reference is given, Masking of any discontinuity by thin layer of paint, may be yes perhaps may be not. If you refer the paragraphs of these codes which will give a cautionary statement at the end "painting/coating may mask the leak". Normally weld joints are left open and ...

Dear All,     I just want to know,whether Sour service material required for Instrument air line(GI threaded pipe).     Noushad Doha-Qatar -- 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 Adi, The designation of 1 in E 7018-1 represents that the electrode will meet the Charpy V-Notch Impact toughness requirements at low tempearture. Actually, 7018-1 has better toughness at very lower sub-zero temperature as well as more Manganese content than E7018.   The purpose of having higher Mn% is to reduce the Ductile/Brittle Transition Temperature and to improve the low temperature impact values of the weld metal. The E 7018 will offer impact value of 47 Joules at -30 degree celcius and E7018-1 will give 47 joules at -50 degree celcius. Thanks and Regards, Mani SarojKumar.      -- 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 ow...

Dear All, In the modern fast track projects these deviations are common , You can accept the deviation provided you extend the hold time for min 4 hrs for joints not seen or painted with chart recorder and accounting any pressure variation with tempt, This is practiced in most of the offshore projects. However for onshore /subsea pipeline hold period is 24hrs and pressure variations vs tempt accounted. Francis Lobo ----- Original Message ----- From: Bathula Raghuram (Mumbai - PIPING) To: 'materials-welding@googlegroups.com' Sent: Thu, 30 Sep 2010 15:03:40 +0530 (IST) Subject: RE: [MW:7285] Can we do painting prior to hydrotest? Interesting, and you have a valid point but nothing is proven, until then just go with the flow (tried and tested methods). No Inspector would be happy but bound to accept as per code.  remember your company specification prohibits it and you are intended to accept, hence code reference is given, Masking of any discontinuity by thin layer of paint, may ...

Interesting, and you have a valid point but nothing is proven, until then just go with the flow (tried and tested methods). No Inspector would be happy but bound to accept as per code.  remember your company specification prohibits it and you are intended to accept, hence code reference is given, Masking of any discontinuity by thin layer of paint, may be yes perhaps may be not. If you refer the paragraphs of these codes which will give a cautionary statement at the end “painting/coating may mask the leak”. Normally weld joints are left open and rest of the area is painted before hydro. In my opinion 105 bar is too high for a layer of paint to with stand, or you may allow only blasting and priming before hydro and final coating after hydro. If I remember correctly only Australian code AS1210 prohibits it.   From: Satish Hingalkar [mailto:shingalkar@gmail.com] Sent: Thursday, September 30, 2010 12:49 PM To: Bathula Raghuram (Mumbai - PIPING) Subjec...

Most of tehe times material manufacturers perform their own tests in the laboratories to ensure that the material is suitable for the requirement. However, what i can assume is, which even needs to be clarified with supplier, material manufacturer would not had tested the sample material for such conditions & would be resisting to specify complinace with NACE as he is not sure about it.   For eg: Material qualified to Sec.IIA has to undergo mechanical, chemical testing etc. However, NACE does not specify any testing requirements (Except for material suspected to HIC, SOHIC, SZC etc) for prequalified materials to ensure it's complaince, it's only the restriction to element such as hardness, certian chemical contents & heat treatment condition. Hence, it would be appropriate that equipment user accepts the material.   However, please refer the Clause 5 of MR0175/ISO 15156-1:2001 which was been further clarified in the Tec...