Materials & Welding

yes but ditch and Interdendritic ditch both are different and it didn't state anything about Interdendritic ditch structure --~--~---------~--~----~------------~-------~--~----~ 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 practice E table 5 specifies that for all grades Ditch structure as non acceptable. step, dual, end grain I and II as acceptable structure. This is as per A262-02a e3 edition. With regards, Kannan Sundaram. "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com> Sent by: materials-welding@googlegroups.com 29/02/2008 12:27 Please respond to materials-welding@googlegroups.com To "Materials & Welding" <materials-welding@googlegroups.com> cc Subject [MW:634] Etch structure acceptance in IGC test per ASTM A262 ASTM A 262 Practice E does not specify anything about the acceptance of Interdendritic ditch structure (refer Table 5)   Where as in others (like in practice C it is specified in non acceptance category)   When a report specifies for weld IGC as Interdendritic ditch structure, is it acceptable? --~--~---------~--~----~------------~-------~--~----~ To post to this group, send emai...

ASTM A 262 Practice E does not specify anything about the acceptance of Interdendritic ditch structure (refer Table 5)   Where as in others (like in practice C it is specified in non acceptance category)   When a report specifies for weld IGC as Interdendritic ditch structure, is it acceptable? --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---

Just to add, apart from the material brittleness issue, this is also the fundamental reason why we find all heavy equipment's and construction machinery's are having hydraulically operated arms. And  low power equipment's in the range of around 10barg, are pneumatically operated. The author's equations are different interpretation of Bernoulli's theorem known to every body, does say the same of the incompressability...and not zero. But the site situations are different and as what happens in the engg. office lacks the visualisation of the site difficulties. So sometimes the project manager has to override certain technical theories to avoid 'over safety' requirements. There has been a situation in one of the LNG project where engg. office wanted hydraulic test in most of the lines and the site went ahead with pneumatic with client's concurrence violating the code. The plant is functioning without any problems for the past 5 years. The client was Shell...

Thank you Sir. This is a very good "on paper proof" of good engineering practice / belief followed world wide. I am quite interested in knowing similar about what are the other advantages of Hydrotesting over pneumatic testing? Thanks in advance, Thanks & Regards, Dhwani Desai. TOYO - PLANNING & PIPING DEPT. 91-22-2573 7213. "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com> Sent by: materials-welding@googlegroups.com 02/29/2008 01:17 PM Please respond to materials-welding@googlegroups.com To "Materials & Welding" <materials-welding@googlegroups.com> cc Subject [MW:630] Criticality of Pneumatic pressure test vs Hydrostatic         onpiping  system FYI! Hereto attached the criteria for evaluating the potential dangerous of pneumatic test vs hydrostatic test from safety point of view. In this concern, we should always remember that is necessary to e...

I want add more to this debate   For LTCS material PQR qualification we have to satisfy both Sec IX and B31.3 Requirements.   1.As per sec ix requirements QW 403.6 The minimum base metal thickness qualified is the thickness of the test coupon T or 5 ⁄ 8 in. (16 mm), whichever is less. However, where T is less than 1 ⁄ 4 in. (6 mm), the minimum thickness qualified is T/2. Here T is less than 6mm.i.e 6mmTest coupon thickess is also not accepted.Only 5.9 mm thickness is accepted if we want lower range qualified to be T/2.Otherwise lower range is T only. 2.For PQR upper limit as per B31.3 T+6mm On Fri, Feb 29, 2008 at 8:52 AM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: It's a good point to debate Mr Mahuri!   Probably your are referring to A-5(a) in the said table, where the range is given T/2 to T+6.4mm (in place of 2T against QW403.6 for the max thickness qualified) In my opinion if mix both these you land up in q...

FYI! Hereto attached the criteria for evaluating the potential dangerous of pneumatic test vs hydrostatic test from safety point of view. In this concern, we should always remember that is necessary to evaluate the design aspects of material selection for piping lines to be submitted to pneumatic test due to Process requirements: in these cases ASME B 31.3 require that the materials be guaranteed against their brittleness at the ambient temperature during pneumatic test. Typical cases are the plants where the ambient temperature could reach even minus 50^C (in particular to places like Azerbaijan, Kazakhstan or Chinese plants on Mongolian border). --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~--...

It’s a good point to debate Mr Mahuri!   Probably your are referring to A-5(a) in the said table, where the range is given T/2 to T+6.4mm (in place of 2T against QW403.6 for the max thickness qualified) In my opinion if mix both these you land up in qualifying more procedures.   I think it similar to PTC (production test coupon) in Table 323.3.1, where you can weld PTC for each thickness range and just do Impact only, other wise if you consider this for PQR qualification range you might have do even bend and tensile or any other test required for PQR as per contract. Think   Please share your views members.   -----Original Message----- From: snehkumar [mailto:mahuri18@gmail.com] Sent: Thursday, February 28, 2008 2:48 PM To: Materials & Welding Cc: Mahuri Snehkumar (TIPO - QA/QC) Subject: query     Dear friends,   Can some one suggest me,       For Low Temperature Carbon Steel, Procedur...

you are a member of this group since July 2007, surprising are you not receiving the mails from group? On Feb 28, 6:53 pm, Nishit Kumar <nishit1...@yahoo.co.in> wrote: > Dear All, > > I would like to become a member of your group > > thanks in advance > > Regards > > Nishit Kumar > Piping Engineer > Benzene Xylene Toluene Unit (BTX) Project, Philippine > Daelim Industrial Co., Ltd.(S. Korea) > > Please don't print this Email unless you really need to - this will preserve trees on planet earth. > > --------------------------------- > Looking for last minute shopping deals? Find them fast with Yahoo! Search. --~--~---------~--~----~------------~-------~--~----~ 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/ -~-----...

A new site launched on bolting...very exhaustive information. But still not enough information on special coatings.. http://www.boltscience.com/index.htm Also look at http://www.fera.org.uk/ Kannan. --~--~---------~--~----~------------~-------~--~----~ 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 All, I would like to become a member of your group thanks in advance Regards Nishit Kumar Piping Engineer Benzene Xylene Toluene Unit (BTX) Project, Philippine Daelim Industrial Co., Ltd.(S. Korea)   Please don't print this Email unless you really need to - this will preserve trees on planet earth. Looking for last minute shopping deals? Find them fast with Yahoo! Search. --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---

Refer the following topic  [MW:49] RE: 43] Welding Procedure for DIN wb 36(1.6368)   to  16mo3(1.5415) in the group     WB36, which is a German low alloy steel (LAS). It differs from typical LAS's primarily by the presence of Cu, which causes precipitation hardening, thereby increasing the strength by about 15-20KSI (103-138MPa) compared to a typical ASME/ASTM LAS, without decreasing the ductility.   Main composition: 0.15%C, 1.15%Ni, 0.65%Cu, 0.35%Mo, 0.02%Nb   F5a is of another LAS type with 4-6%Cr and 0.5Mo   You could establish the procedure referring manufacturer catalogues for suitable consumable and the heat treatment w.r.t to your construction code   Please note that it is prohibited to post any document (like WPS in your case) which is of a company’s property in the group to public, please do not raise such queries, also not to distribute in the group   From: shailesh dave [mailt...

Good point highlighted by Mr Rao, but E8016-C1 the values are with PWHT condition and not as welded condition with 80 and 67 Ksi as UTS/YS respectively against 80 and 60 of base material for the mentioned thickness. -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of UR Rao Sent: Thursday, February 28, 2008 6:06 PM To: Materials & Welding Subject: [MW:623] Re: 596] Re: selection of Production test coupons (PTC) Mr. Jivan, i would like to throw some light on this topic. (my explanation is not code requirement however it is part of engineering which will help you is understanding you surveyors requirement). your BV surveyors intention in asking you to do the mechanical test for PTC#1 and PTC#2 was right, however he could not put the request properly. you are purely looking in to the code requirement and arguing the case however what you forgot was the metallurgy and mechanical properties of materials. the mater...

Mr. Jivan, i would like to throw some light on this topic. (my explanation is not code requirement however it is part of engineering which will help you is understanding you surveyors requirement). your BV surveyors intention in asking you to do the mechanical test for PTC#1 and PTC#2 was right, however he could not put the request properly. you are purely looking in to the code requirement and arguing the case however what you forgot was the metallurgy and mechanical properties of materials. the material you were using to build your sphere was SA 537 Cl 2 whose tensile strength is 80 - 100 ksi. you are intended to subject the bottom part of sphere to two PWHT Cycles. when you compile your data, the base material you are using is 80 - 100 ksi and electrode you are using is 80ksi. please carefully read the manufacturers data supplied of your welding electrode manufacturer, you will see that the results posted were as welded not after one PWHT or 2 PWHT Cycles. the reason why manufacture...

I assume you are using ASME Sec IX for qualifications, since P no (P5A and 5B not P22/P91) are different for both these materials you need perform new PQR for welding P22 (falls under 5A) to P91(falls under 5B) refer QW403.1 From: shailesh dave [mailto: snd2988@yahoo.com ] Sent: Thursday, February 28, 2008 1:25 PM To: materials-welding@googlegroups.com Subject: ESTABLISHMENT OF WPS FOR P22 TO P91   DEAR MEMBERS.   I HAVE FOLLOWING QUARIES:-   I ALREADY HAVE ESTABLISHED WPS/PQR FOR ASTM A335P91 TO P91 FOR 57 mm THK.   NOW I HAVE COME ACROSS DISSIMILAR METAL WELDING OF ASTM A335P22 TO P91 58 mm THK.   MY QUESTION IS  DO I NEED TO ESTABLISH NEW WPS/PQR OR THE EARLIER ONE CAN SUPPORT THIS.   REGARDS,   S.N.DAVE   QA/QC MANAGER, TATA PROJECTS LIMITED   IWPP -III - SHUAIBAH POWER PROJECT KINGDOM OF SAUDI ARABIA...

TDW claims they can tap (hot/wet/cold) from 0.5” to 1.5”, visit at www.tdwilliamson.com Please post here if u get any positive feed back   Best regards Raghuram Bathula From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Zameer Mohammed Sent: Tuesday, February 26, 2008 10:42 AM To: materials-welding@googlegroups.com Subject: [MW:607] 1'' Line Tapping   Gents…..   I guess someone can help me on this.   We have a 1'' line which carry HC gas             Material - Carbon Steel             Pressure - < 1 bar   We want to take a tapping point from this line. We cut the line using cold cutting. There is no immediate isolation point available near the tapping point.   I heard about some balloon type plug that can be fitted inside t...

What is your welding position of PTC #1? Assuming you are using Same WPS for all joints (category A, assuming all your welds fall under this category) and you have done your PTC#1 in Vertical position, In my opinion PTC#2 is not required {refer UG-84(i)(3)(a)(2)}.   However it could be the reason your Surveyor is asking for PTC#2, since some portion weld seam is subjected to PWHT two times, in that case even your PTC#2 should undergo PWHT twice, is n’t it? I am not clear on this; members please share your views? From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Jivan Dhamane Sent: Friday, February 22, 2008 4:13 PM To: materials-welding@googlegroups.com Subject: [MW:596] Re: selction of Production test coupons (PTC)   Dear Friend   Design code is ASME Section Div.-1. MOC is SA 537 Cl.2,  Thickness is 57.5mm to 59.9mm, MDMT is -46 (Minus) Degree Celcius, Welding Proc...

Request to all members: Please use appropriate subject line!   What is your design code, Sec VIII div 1 is mandatory RT after PWHT only for Ferritic SS grades. But if I am the inspector may insist for NDT after PWHT since thick is high in your case, alternately you may propose UT after PWHT instead of RT.     From: Vijay Singh [mailto:vijays@tpc.ae] Sent: Wednesday, February 27, 2008 10:34 AM To: materials-welding@googlegroups.com Subject: RE: 611] Re: ELEMENT WHICH GIVE LOW TEMP TOUGHNESS TO SA333 Gr.6   I need your inputs   SS 321 Pipe , 42 mm thickness , welded . radiography was performed after welding and report  cleared by TPI was OK with not a single repair advice on 224 mtrs…... ASTM allows radiography before PWHT , but client is insisting on radiography after PWHT . Is there any change in results if radiography is done after PWHT as compared to the radiography results before PWHT.   What is the log...

Online Engineering Calculators (Mechanical/ Civil/ Mettalurgy/ Unit Conversion, etc.) & other Technical sites     Please visit www.calculatoredge.com & www.mycalculations.com an online tool for Electrical, Electronics, Mechanical, Civil, Chemical Engineers, it has hundreds of equations and formula, its all FREE.   Following are the good technical sites:   Description SITE ENG NET http://www.engnetglobal.com/ ESB Consultancy http://www.esbconsult.com/ International protective coating http://www.international-pc.com/pc/ ENGINEERING POWER TOOLS www.pwr-tools.com SHELL E-SPIR www.e-spir.shell.com Web-based Engineering Calculations & Graphics www.mycalculationS.com  Steel Guide www.key-to-steel.com   www.techstreet.com My calculat...