Materials & Welding

Dear all ,  I hope the detail which I am going to ask  may be familiar to all,   The Query is for GTAW –Carbon Steel welding some time we will use ER-70S-6 but it is not  having valid A-Number as per ASME Section IX. But in ASME Section II –C they given this electrode chemical composition for one range but in ASME Section IX they have some limitations for A-Numbers. Why this happens it all under ASME Code. Can anyone explain. How to solve this problem. For example some company bought ER-70S-6 in huge amount what they will do.  Please find a solution?????????????   J.C.Andrews, QA/QC Engineer, Doha-Qatar.  

Dear sir,        According to the ASME B31.1 and to your below detail first I confirm it that PWHT is required.   The details as follows, As per ASME B31.3 Table 331.1.1    P1-carbon steel :  Thickness greater than 19 mm  and tensile strength for all, the PWHT minimum metal temperature shall be 593 0 - 649 0 C for 2.4 hr.   P5A-Alloy steel:   Thickness greater than 13 mm  and tensile strength for all, the PWHT minimum metal temperature shall be 704 0 - 760 0 C for 2.4 hr.    So you can do PWHT with 704 0 - 760 0 C for 2.4 hr and cooling rate shall be followed by the same table notes.   It is my understanding. If any controversy let me know. Thank You.   Regards,   J.C.Andrews, QA/QC Engineer, Doha-Qatar.     From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kannayeram gnanapandithan ...

The NICK-BREAK TEST is useful for determining the internal quality of the weld metal. This test reveals various internal defects (if present), such as slag inclu sions,  gas  pockets,  lack  of  fusion,  and  oxidized  or burned metal. To accomplish the nick-break test for checking a butt weld, you must first flame-cut the test specimens from a sample weld . Make a saw cut at each edge through the center of the weld  thanx Hafiz Waqar Zia  Etimaad Qatar LL.C QA/QC Dept. Doha  Qatar Cell: +97466598936 Email- Waqqaar1@hotmail.com       Date: Sun, 31 Oct 2010 11:56:58 +0400 Subject: Re: [MW:7961] purpose of doing nick-break test. From: vividsarwan@gmail.com To: materials-welding@googlegroups.com Dear Mr Baskaran, This test is performed to reveal internal imperfections such as slag inclusion, lack of fusion, incomplete penetration, porosity, etc in a butt weld.  A butt weld specimen is f...

Please comment on the following issue.   As per BS EN 10225, S420G2+M--thickness less than 40mm should have a tensile strength of 500 to 660MPa. Material test certifactes shows a vaue of 623MPa. This material is used for welding procedure qualification test where the tensile strength reported is 550Mpa. My collegue who is reviewing the WPS\PQR says that he will reject the WPS\PQR because tensile value of PQR test specimen is less than 623MPa. My opinion is that the PQR test specimen meets BS EN 10225 and so should be accepted.   Please comment on this issue.  -- With Regards. SGR -- 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 decisi...

Other intention is to get a measure of the ductility of the joint at the bend location. --- On Sun, 31/10/10, saRAVANAN <vividsarwan@gmail.com> wrote: From: saRAVANAN <vividsarwan@gmail.com> Subject: Re: [MW:7961] purpose of doing nick-break test. To: materials-welding@googlegroups.com Date: Sunday, 31 October, 2010, 1:26 PM Dear Mr Baskaran, This test is performed to reveal internal imperfections such as slag inclusion, lack of fusion, incomplete penetration, porosity, etc in a butt weld.  A butt weld specimen is fractured along an artificial notch that is intentionally machined on the centre line of the fillet weld specimen to facilitate fracture in the centre of the weld. The fractured specimen cross section is then visually examined for imperfections. On Sat, Oct 30, 2010 at 1:53 PM, bas karan < baskaran07@yahoo.co.in > wrote: Dear all pls explain if any one know the purpose of doing nick-break test. Thanks&regards Baskaran. -- To post t...

Pl refer DNV OS F101 for Pipeline and API RP 2A for structural . Min 3" seggration . Most of the project specifications give the requirement , some time the staggering in top by 90 degree . Best Regards, Francis Lobo ----- Original Message ----- From: (PBR)P.BalajiRajan To: materials-welding@googlegroups.com Sent: Sun, 31 Oct 2010 00:57:28 +0530 (IST) Subject: [MW:7959] Longitudinal weld seam staggering Dear colleagues  In any code details given regarding Longitudinal weld seam staggering requirements of adjoining pipes if so please forward, Here By,   P.BalajiRajan,     -- 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...

Dear Friends, Here question is no of welders could be qualified using a single coupon ,For qualficiation of welder min 12 " weld length is required to validate a welder performance by radiography or four bend test at required positions as per code  and  accordingly we can qualify no of welders per coupon .For 16" pipe line coupon two welders may be qualified in order to maintain welding sequence of pipeline welding . Best Regards, Francis Lobo ---- Original Message ----- From: (PBR)P.BalajiRajan To: materials-welding@googlegroups.com Sent: Sun, 31 Oct 2010 00:40:03 +0530 (IST) Subject: Re: Re: [MW:7960] No of Welders Dear Dr.Paulose John,        As per your statement in SEC IX QW 301.2 and API 1104 para 6.2.1 it has been not mentioned regarding the minimum number of welder to be qualified by one WPS    QW-301.2 Qualification Tests. Each manufacturer or Contractor shall qualify each welder or welding operator For each ...

Dear Mr. Das, First of all, my appologies for refering a wrong para of API1104. Read 6.1 for 621. I don't think it mandatory to have 2 welders on pipes above 12", I couldn't find any thing to support this requirement in API 1104. Whereas in Section IX it is allowed to qualify more than one welder on a single test coupon. Refer QW-306. It is not mandatory to use two welders in pipes larger than 12" in Section IX also. Regards, Dr. Paulose John QA/QC Manager Unisis Engineering KSA On Sun, 31 Oct 2010 08:08:06 +0530 Arun Das wrote > Dear Dr.John, As a custom for above 12" pipe we will be using 2 welders for the welding process. It is so done because of heat input and distribution factors I beleive, but my question was that do this is stated as mandatory in any of the codes or standards. I am having 1104 20 th edition of November 2005 with me. API 1104:2007. is the modifications?? Thanks and regards, > Arun S Das > > From: Dr. Paulose John ...

Dear Mr Baskaran, This test is performed to reveal internal imperfections such as slag inclusion, lack of fusion, incomplete penetration, porosity, etc in a butt weld.  A butt weld specimen is fractured along an artificial notch that is intentionally machined on the centre line of the fillet weld specimen to facilitate fracture in the centre of the weld. The fractured specimen cross section is then visually examined for imperfections. On Sat, Oct 30, 2010 at 1:53 PM, bas karan < baskaran07@yahoo.co.in > wrote: Dear all pls explain if any one know the purpose of doing nick-break test. Thanks&regards Baskaran. -- 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 purpos...

Dears, Is it acceptable to qualify 2 welders (ASME IX - 6G - one by side) per cupon (down from 12" NPS) or not ? In my opinion, technically it is not acceptable to qualify two welders in same cupon 1. As per Section IX , diameter is specified for welder qualification QW 452.3.  2.Since hand movement will be different in two sides (clock wise and anti clock wise), each welder is  preferred  to qualified in  separate  coupons . If the thickness does not matters ( low thickness) , you can qualify the welders with 2" pipe. Also record wise ( RT films), it will be difficult. I am no so familiar with API 1104 thanks and regards, Arun From: alexis_viteri@hotmail.com To: materials-welding@googlegroups.com Subject: RE: [MW:7949] No of Welders Date: Sat, 30 Oct 2010 12:27:53 -0500 Dear Members,   Is it acceptable to qualify 2 welders (API 1104 - 6G - one by side) per cupon (down from 8" NPS) or not ? Is it acceptable ...

For this materilal you can use either E11016 or E11018M elctrode (Atom arc / Hobart Hobaaloy brand has electodres readily avaible) For SAW wire ECM2 & FCAW E111T1K3MJ can be used (Lincon brand) . Generally this materials are used for low temp application (-40°C) Preheat & Post heat is mandetory for this material On Sun, Oct 31, 2010 at 7:46 AM, Prakash Hegde < pb.hegde@yahoo.com > wrote:       Netra material being high  strength material which we have tried with E11016 type elctrode and SAW wire which require to achieve impact at minus 40C and higher UTSatroom room temp (This  material is similar to SA517 gr F or similar) Welding of this material is critical from resulted properties point of view W Welding parameters are to be estblished with batch testing in 3G position for electrodes with controlled bead length , current, volt to estblish heat input. and  also preheating and post heating temp.Some time you may require to have ISR for restrain joint   ge...

Is it allowed/accepted practice for PWHT of matl combination P1+P5A, if so what is the temp, Mr Goswami Thank u Pandithan On Wed, Oct 27, 2010 at 4:33 PM, Brl Pp < refazosaris@gmail.com > wrote: Good morning, Please see below the data of piping line for erection: - Diameter of pipe: 48" - Produced: liquefied natural gas. - Piping class: D41A - Piping thickness: 38mm. - Weldolet thickness : 15mm. - Design code: ASME B31. 3. 2008 Edition. - PWHT: By code. According to your experience, for this case we use the PWHT? If yes, please share your experience. Thanks in advance. My best regards. Redouane (Project engineer) Algeria -- 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 educationa...

Karthik Sir,  Is it possible to write a WPS with base metal (QW-403) P No. 1 Gr No.1  to P No.1  Gr.No.1 OR 2 ? so possible P1GI P1G1, P1G1 P1G2 & P1G2 P1G2 Welding. QW-403.5 is not telling to do the test again for new group no. of the same P no. material with same E&SE variables? (interpretation) So re writing a WPS is enough for PIG1 to P1G2 welding with the current PQR  , insted of further testing ? Please advice........... I have the same issue. Regards Aneesh KSA On Fri, 29 Oct 2010 18:36:00 +0530 Karthik karthik6684@yahoo.com wrote Hi, If Impact is required by Code then you have to do additional supporting PQR(CVN test only) for G2. My interpretaion for QW403.5 as follows. QW403.5: If, however, two or more qualification records have the same essential and supplementary essential variables , except that the base metals are assigned to different Group Numbers within the same P-Number, then the combination of base metals is also qu...

Dick,   Attached are 2 documents on this material. The first document is the English version of the same data sheet attached in your email. The second one gives general guidelines on handling of this steel, fabrication, welding. Both of these documents are free documents (available in the web).   As pointed out by Mr. Hegde, welding of this steel would require the same level of care and precautions as need for a Q&T steel. As you can see NAXTRA has many grades, the higher grade means high UTS and lower  % elongation, thus welding gets more and more difficult. Usually for SMAW with E-9018M or 10018M are welder friendly electrodes (due to slightly lower UTS and better %EL), E-11018M would require careful handling during welding due to higher as welded tensile stresses involved.   I have not handled NAXTRA but handle 517 Gr B and F quite frequently. Well the basic steps for good and quality welding are pretty much the same for Q&T steels....

      Netra material being high  strength material which we have tried with E11016 type elctrode and SAW wire which require to achieve impact at minus 40C and higher UTSatroom room temp (This  material is similar to SA517 gr F or similar) Welding of this material is critical from resulted properties point of view W Welding parameters are to be estblished with batch testing in 3G position for electrodes with controlled bead length , current, volt to estblish heat input. and  also preheating and post heating temp.Some time you may require to have ISR for restrain joint   generaly Kobelco or Thyssen make brand are good which we have used   Regards   Hegde P.B.       From: Dick Overkleeft <dick.overkleeft@gmail.com> To: materials-welding@googlegroups.com Sent: Sat, 30 October, 2010 11:21:47 PM Subject: [MW:7950] NAXTRA M700 weldebility We are going to use above material fro shipbuilding purpose. Thickn...

IS THERE ANYTHING LIKE DIN 62 FE penetrameter? --- On Sat, 30/10/10, Kale, Bhaskar M <bmkale@gmail.com> wrote: From: Kale, Bhaskar M <bmkale@gmail.com> Subject: Re: [MW:7938] DIN 62 FE Penetrameter Wire Range To: materials-welding@googlegroups.com Date: Saturday, 30 October, 2010, 2:14 PM please see the attached file .DIN  and ISO IQI  wire diameter and number are same. Bhaskar Kale On Sat, Oct 30, 2010 at 4:08 PM, limesh M < limesh78@gmail.com > wrote: Dear All, How we can identify the number of wires(Range of wire like ISO penetrameter numbers 1-7,6-12,10-16) in DIN penetrameter?I have a RT film with DIN 62 FE penetrameter.What is the wire range of this penetrameter(To get the diameter of essential wire to calculate the sensitivity)?I have reference of all other penetrameters like EN,ISO and ASTM.Unfortunately,I am clueless about DIN. EN wire type penetrameter(eg. 1 FE EN,6 FE EN etc.) and DIN wire type penetrameter are same or not?...