Materials & Welding

If feasible you can try Water Jet Cutting ! Regards Prem Nautiyal On Thu, 29 Apr 2010 19:42:32 +0530 wrote >Please check with your machine manufacturer if it is suitable for mixed gas This will give a far cleaner cut and will remove the possibilities of moisture entering into the plasma stream Best Regards PHIL CHEW Global Segment Manager -Transport ,Shipbuilding,M&R ESAB Holdings Ltd, 322 High Holborn, London, UK, WC1V 7PB Tel: +44 (0) 7584 219132 email: PHIL.CHEW@esab.net ESAB Holdings Ltd is a company registered in England and Wales . Co registration no 1687590 Registered Office: 322 High Holborn, London , UK , WC1V 7PB www.esab.comPlease consider the environment before printing this email. From: Pratheesh Chandran [chichuprem@gmail.com] Sent: 29/04/2010 09:50 ZE4 To: materials-welding@googlegroups.com Subject: [MW:4994] DSS pipe cutting dear All   Please provide your expertise for the below problem   I need to take a branch connection o...

AWS welding handbook says the following for CO2 with GMAW:   . . . "With a CO2 shield, the metal transfer mode is either short circuiting or globular.  Axial spray transfer requires an argon shield and cannot be achieved with a CO2 shield.  With globular transfer the arc is quite harsh and produces a high level of spatter."  (implied if transfer is globulr then) "This requires that CO2 welding conditions be set to provide a very short "buried arc" (the tip of the electrode is actually below th surface of the work in ordre to minimize spatter."   In the US, when CO2 is used as a shielding gas, the transfer mode is nearly always short circuiting arc transfer (dip).  My understanding is that in Europe globular transfer is not uncommon, but I have little experience with it in actual welding.  If your process is short circuiting transfer, and ASME Sc IX is to be applied you will need to take into account essential variables Q...

Dear Members, we are going to qualify MIG welding process. How to differentiate metal transfer like dip, globular & spray? we are using IS 2062 material with 99.9% CO2 shielding gas,1.2 dia filler wire,12mm thick in single '' V'' Grove  butt Joint. what is the desired testing requirements ? depending of metal transfer as per section IX   thanks and regards, Suresh -- 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.

Please check with your machine manufacturer if it is suitable for mixed gas This will give a far cleaner cut and will remove the possibilities of moisture entering into the plasma stream Best Regards PHIL CHEW Global Segment Manager -Transport ,Shipbuilding,M&R ESAB Holdings Ltd, 322 High Holborn, London, UK, WC1V 7PB Tel: +44 (0) 7584 219132 email: PHIL.CHEW@esab.net ESAB Holdings Ltd is a company registered in England and Wales . Co registration no 1687590 Registered Office: 322 High Holborn, London , UK , WC1V 7PB www.esab.comPlease consider the environment before printing this email.   From: Pratheesh Chandran [chichuprem@gmail.com]   Sent: 29/04/2010 09:50 ZE4   To: materials-welding@googlegroups.com   Subject: [MW:4994] DSS pipe cutting dear All   Please provide your expertise for the below problem   I need to take a branch connection of 4" from a pipe 12" A790 UNS 31803 and had been using plasma cutting to do the same. However soon after ca...

Dear Kathalingam Babu,                                      40J (30 Ft-lbf) for pipe in grades > X 80 grade materials & less than 19mm thick. The HAZ for the longitudinal seam weld in HFW welded pipe is usually too narrow to permit accurate sampling for Charpy testing. The requirement for Charpy testing of the seam weld HAZ applies only to SAWL/ SAWH and COWL/ COWH pipe.   On Tue, Apr 27, 2010 at 1:22 PM, Kathalingam Babu < kathalingam.qaqc@ppl.com.sg > wrote: Gents,   Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?   Thanks & Regards,   K.Babu -- 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, User...

dear All   Please provide your expertise for the below problem   I need to take a branch connection of 4" from a pipe 12" A790 UNS 31803 and had been using plasma cutting to do the same. However soon after carrying out the Plasma cutting it was noticed that the inner wall of 12" pipe starts getting corroded due to the sparks impinching on the inner wall of the pipe  arised during plasma cutting ,( attached Photo graphs )  Kindly advise  how to avoid  the same  or any other suitable precautionary steps to be taken during cutting  on DSS.   Regds Prem -- 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. a...

Dear Mr. Augstin,                             Can you tell us what is your offshore requirement... Cleaning up to?, paint systems??? Regards, Y.C.Shiva, Doha Qatar, +974-6166465 On Wed, Apr 28, 2010 at 7:34 PM, Kristian Lund Jepsen (KUJ) < KUJ@ramboll.com > wrote: You can take a look at NORSOK M-501. Ref. link: http://www.standard.no/en/sectors/Petroleum/NORSOK-Standard-Categories/M-Material/M-5012/   This is a standard open for everybody and free of charge.   You can always modify requirements, such as the requirements for qualifications of painting/coating systems.   regards Kristian From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of AGUSTIN JIMENEZ Sent: 28. april 2010 13:23 To: materials-welding@googlegroups.com Subject: [MW:4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS Hi. I need information over technical specifications for paints and coating in offshore platfo...

Dear  All & Mr. TAMER,,   Carbon Equivalent (CE) is an empirical value in weight percent, relating the combined effects of different alloying elements used in the making of carbon steels to an equivalent amount of carbon. This value can be calculated using a mathematical equation . By varying the amount of carbon and other alloying elements in the steel, the desired strength levels can be achieved by proper heat treatment. A better weldability and low temperature notch toughness can also be obtained. In terms of welding, the Carbon Equivalent governs the hardenability of the parent metal. It is a rating of weldability related to carbon, manganese, chromium, molybdenum, vanadium, nickel and copper content. There are several commonly used equations for expressing Carbon Equivalent. One example of such mathematical formula is: CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 The table below shows the preferred and maximum weight percent content of some elements and the d...

Hi Carlos Quintini   It is obvious that, the longi specimen CVN values is more than the transverse specimen CVN values.   Since if we need to follow ABS Modu code, which calls the CVN test at Weld metal, Fusion Line, 2 mm, 5 mm  ;   If i take transverse CVN samples for PQR, will be require more set of pipes to do the CVN tests.   From my point of View, it is immaterial, whether we taking Longi or transverse specimen, weldment should satisfy the requirement.   Rgds,   K.Babu     ----- Original Message ----- From: Carlos Quintini To: materials-welding@googlegroups.com Sent: Thursday, April 29, 2010 12:53 AM Subject: Re: [MW:4990] API 5L X85 -CVN Requirements Mr. K. Babu:   API 5L ,ed. 44, does not request longitudinal CVN test, because due to rolling process for plate production for seam weld pipe or seamless pipe, the grain orientation of the microstru...

Mr. K. Babu:   API 5L ,ed. 44, does not request longitudinal CVN test, because due to rolling process for plate production for seam weld pipe or seamless pipe, the grain orientation of the microstructure has the lowest  fracture toughness values  transverse to pipe axis. Therefore, CVN spicemens must be taken transverse to the pipe axis based on the fact that this is the most unfavorable spicemen orientation to obtain the minimum requested absorbed energy values On the other hand, X85 grade is an intermediate grade agreed for production between purchaser and manufacture According to table 8 of API 5L, for body full size absorb energy the values for X85 grade can be interpolated according to values for grades X80 and X90 which is 30 ft-lb for pipe diameters from 20 to 36 inches and for test temp of 0°C (32°F), or lower temperature if agreed.   For CVN test for seam weld and H.A.Z ., according to 9.8.3, the absorb energy value is also 30 ft-lb at 0°C (32°F), or lower temper...

You can take a look at NORSOK M-501. Ref. link: http://www.standard.no/en/sectors/Petroleum/NORSOK-Standard-Categories/M-Material/M-5012/   This is a standard open for everybody and free of charge.   You can always modify requirements, such as the requirements for qualifications of painting/coating systems.   regards Kristian From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of AGUSTIN JIMENEZ Sent: 28. april 2010 13:23 To: materials-welding@googlegroups.com Subject: [MW:4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS Hi. I need information over technical specifications for paints and coating in offshore platforms used actually.   Best. Regard Agustin Jimenez   -- 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 thi...

  Vijay,   Is your query on the storage of anhydrous ammonia? Then you need to incorporate some additional design requirements in your system:-   ·          Design code for vessels and exchangers or other static equipments:-ASME SecVIII, DIV-1 or BS-5500/PED directive. Additionally the equipments shall be PWHT, and if the design below -33 0 C  materials and welds shall be impact tested to UCS-66. ·          Piping design codes ASME B-31.3 or equivalent European design codes. Materials requirements shall be same as the static equipments. ·          Addtionally there should be a comprehensive and periodic inspection program for all the equipments.   Usually the design codes as mentioned above are popular choices for equipment design. For storage and handling  CGA G-2.1 or  ANSI   K 61.1 are followed commonly in North Ame...

Tamar, In regards to your question about sour service........It has been determined that hard spots in materials (HAZ and welds) are susceptible or may lead to cracking in different types of corrosive service and the hardness limits and recommendations are defined in NACE MR0175 and NACE MR0103/SP0472. I am assuming you will be dealing with a carbon steel for the pipe. The lower the CE, the better the chances of meeting the hardness requirments in the HAZ especially if you are welding without a post weld heat treatment. Since you are welding pipe and most likely will not do a stress relief, a CE=0.38 or less will give you the best chance to meet the hardness limits in the HAZ. You will still need to qualify a welding procedure to demonstrate that you can meet the hardness limits if you are welding to NACE MR0175, NACE MR0103. This is just the tip of the iceberg! On Apr 28, 4:48 am, tamer said < tamer_ba...@yahoo.com > wrote: > Dear Mr. Rupesh A. Jambhale > Thanks f...

Hi. I need information over technical specifications for paints and coating in offshore platforms used actually.   Best. Regard Agustin Jimenez  

There is an intermediate grade called API 5L X85 , it is commonly used in offshore industries.   Might be added in next edition of API 5L Spec.   ----- Original Message ----- From: Bathula Raghuram (Mumbai - PIPING) To: materials-welding@googlegroups.com Sent: Wednesday, April 28, 2010 4:17 PM Subject: RE: [MW:4973] API 5L X85 -CVN Requirements I heard that 44th edition of API 5L has 3 new grades X90, X100 and X120. what is X85? CVN is mandatory for all PSL2 pipes, refer para 6.2.5.2 From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu Sent: Tuesday, April 27, 2010 3:53 PM To: materials-welding@googlegroups.com Subject: [MW:4966] API 5L X85 -CVN Requirements Gents,   Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?   Thanks & Regards,   K....

Hi, As per API 5L - 44th edition X85 grade is not there. For the CVN values refer 9.8.2.3 of API 5L 44 th edition.   K.Ramalingeshwara Rao. On Wed, Apr 28, 2010 at 11:17 AM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: I heard that 44th edition of API 5L has 3 new grades X90, X100 and X120. what is X85? CVN is mandatory for all PSL2 pipes, refer para 6.2.5.2 From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Kathalingam Babu Sent: Tuesday, April 27, 2010 3:53 PM To: materials-welding@googlegroups.com Subject: [MW:4966] API 5L X85 -CVN Requirements Gents,   Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?   Thanks & Regards,   K.Babu -- 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 gro...

Hi   Since the effect of boron on the material properties & Weldability is still under research.   If you contact the IGCAR kalpakkam , you can get the exact answer.   There is some research is going on this chapter in IGCAR.   It is common understanding is effect of boron on steel is increases the Hardenability of steel ,but, still lot to reveal in this chapter.   Rgds,   K.Babu Singapore     ----- Original Message ----- From: Vikas Shah To: materials-welding@googlegroups.com Sent: Wednesday, April 28, 2010 4:14 PM Subject: Re: [MW:4972] about boron content in SA 516 grade 70 plates Dear Sir With reference ur mail on nov 30 2009 you told that it is ok if it is upto 0.003% and what difference it make if there is boron in the plates is excessive amount can you give me any detailss weather it can be use or not or any thing related to this in astm books   ...

Hydrogen levels of the filler metals should also be taken into consideration and may allow for a reduction in preheating Best Regards PHIL CHEW Global Segment Manager -Transport ,Shipbuilding,M&R ESAB Holdings Ltd, 322 High Holborn, London, UK, WC1V 7PB Tel: +44 (0) 7584 219132 email: PHIL.CHEW@esab.net ESAB Holdings Ltd is a company registered in England and Wales . Co registration no 1687590 Registered Office: 322 High Holborn, London , UK , WC1V 7PB www.esab.com Please consider the environment before printing this email. "Jambhale, Rupesh A" <Rupesh.Jambhale@ To mottmac-india.com " materials-welding@googlegroups.com > " ...