Materials & Welding

FOR Gr 91- ER90S- B9, ER9015-B91  consumables ,  minus 20 Deg C = 40 J can not be achieved due to Cr  Mo Nb V weld metal chemistry.   Plus 20 Deg C =  40 J   is the requirement so as to have good toughness to weld metal. This is the requirement that is specified by most of the Customer Specifications.   Minus 20  Deg C just can not be met. On Thu, Dec 31, 2020 at 8:37 AM Jamie Reyes < jamiejrmachineco@gmail.com > wrote: Honestly, to many variables involved. To the welding process used, to the weldor's technique, just to many variables to give you an educated answer. One would be guessing. Maybe you can post the WPS used? Sorry I couldn't be more helpful. More information is needed..... Regards, Jamie Reyes J.R. Machine Company, Inc. On Wed, Dec 30, 2020 at 8:26 PM Pravin Poornachandran < htcispravin@gmail.com > wrote: Dear expert,  I have B91 material to be weld, 6mm and 10mm thickness, however project requirement need to test -20degC impact which I don't really...

Honestly, to many variables involved. To the welding process used, to the weldor's technique, just to many variables to give you an educated answer. One would be guessing. Maybe you can post the WPS used? Sorry I couldn't be more helpful. More information is needed..... Regards, Jamie Reyes J.R. Machine Company, Inc. On Wed, Dec 30, 2020 at 8:26 PM Pravin Poornachandran < htcispravin@gmail.com > wrote: Dear expert,  I have B91 material to be weld, 6mm and 10mm thickness, however project requirement need to test -20degC impact which I don't really agree due to Cr-Mo is not intended for low temperature application.  I performed PWHT 770degC x 1hr but unable to achieve desired charpy, I was wondering if I extend holding time for 6hr, is it possible to achieve -20degC? (Average 40J).  Welding Process: SMAW and GTAW  Could anyone advise and guide how to achieve desired impact ?  Best regards, Pravin  -- https://materials-welding.blogspot.com/ https://www.linked...

Dear expert,  I have B91 material to be weld, 6mm and 10mm thickness, however project requirement need to test -20degC impact which I don't really agree due to Cr-Mo is not intended for low temperature application.  I performed PWHT 770degC x 1hr but unable to achieve desired charpy, I was wondering if I extend holding time for 6hr, is it possible to achieve -20degC? (Average 40J).  Welding Process: SMAW and GTAW  Could anyone advise and guide how to achieve desired impact ?  Best regards, Pravin  -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CADDyn7e%2B2Vea_Vc61p4Gnfm4Yp%3DU3SasP_R-%3D5...

Please refer to literature on boiler tube expansion on www.venus- boiler. com Regards On Mon, 28 Dec, 2020, 3:07 pm Neeraj Yadav, < neeru25oct@gmail.com > wrote: Any reference for expansion beyond drum thickness is not acceptable as per ASME Standards/IBR. This is specifically mentioned in TEMA that expansion length shall be the tubesheet/drum thickness minus 1/8" (3.2 mm) and no expansion of tubes beyond drum/tubesheet thickness is acceptable. However these standards are being followed for Heat exchangers (Heaters, condensers, coolers & re-boilers) only and our boiler is designed as per ASME Sec-1 and IBR.   On Mon, Dec 28, 2020 at 10:37 AM Prasad Ghanekar < prsgne@gmail.com > wrote: Expanded beyond shell thickness is not acceptable. There will be a notch formation on tube at edge of shell. Tubes are likely to be sheared at this point. Prasad G. On Sun, 27 Dec 2020, 10:31 Neeraj Yadav, < neeru25oct@gmail.com > wrote: Min-8% to Max-20% On Satur...

Any reference for expansion beyond drum thickness is not acceptable as per ASME Standards/IBR. This is specifically mentioned in TEMA that expansion length shall be the tubesheet/drum thickness minus 1/8" (3.2 mm) and no expansion of tubes beyond drum/tubesheet thickness is acceptable. However these standards are being followed for Heat exchangers (Heaters, condensers, coolers & re-boilers) only and our boiler is designed as per ASME Sec-1 and IBR.   On Mon, Dec 28, 2020 at 10:37 AM Prasad Ghanekar < prsgne@gmail.com > wrote: Expanded beyond shell thickness is not acceptable. There will be a notch formation on tube at edge of shell. Tubes are likely to be sheared at this point. Prasad G. On Sun, 27 Dec 2020, 10:31 Neeraj Yadav, < neeru25oct@gmail.com > wrote: Min-8% to Max-20% On Saturday, 26 December 2020 at 13:14:34 UTC+5:30 Vishwas Keskar Welding Manager WELDING wrote: What is  expansion % ? On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav < neeru...

there is bulging immediate outside drum thickness, is it acceptable THANKS & BEST REGARDS, KG.PANDITHAN, BE, IWE,  CSWIP 3.1, ISO 9712 Level 2 in VT, ASNT-Level II in PT,MT,RT & UT, LA ISO 9001-2015, International Welding Engineer.  CONSULTANT-WELDING & QUALITY Mobile no: +919940739349 On Mon, Dec 28, 2020 at 10:37 AM Vishwas Keskar < vvkeskar123@gmail.com > wrote: 20 %  expansion - seems on higher side. Normal is @8-12 % Advice -  Check thinning  and find out tube thickness . Check this much thk after thinning this much  is acc to Engineering . On Sun, Dec 27, 2020 at 9:01 AM Neeraj Yadav < neeru25oct@gmail.com > wrote: Min-8% to Max-20% On Saturday, 26 December 2020 at 13:14:34 UTC+5:30 Vishwas Keskar Welding Manager WELDING wrote: What is  expansion % ? On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav < neeru...@gmail.com > wrote: Dear experts, We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60...

Expanded beyond shell thickness is not acceptable. There will be a notch formation on tube at edge of shell. Tubes are likely to be sheared at this point. Prasad G. On Sun, 27 Dec 2020, 10:31 Neeraj Yadav, < neeru25oct@gmail.com > wrote: Min-8% to Max-20% On Saturday, 26 December 2020 at 13:14:34 UTC+5:30 Vishwas Keskar Welding Manager WELDING wrote: What is  expansion % ? On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav < neeru...@gmail.com > wrote: Dear experts, We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60 kg/cm2 and steam temperature of 392 Deg .Cel. All water tubes of boiler are connected to steam( 63 mm Thk) & Mud drum(40mm Thk) with expanded design of construction. In mud drum it is observed that tubes ( 51X4 mm) are expanded upto 30mm more than the drum thickness and indicating as bulged. we have checked the OD at bulged part and observed 1-2 mm flared and thickness around 3.5 mm Kindly advise weat...

20 %  expansion - seems on higher side. Normal is @8-12 % Advice -  Check thinning  and find out tube thickness . Check this much thk after thinning this much  is acc to Engineering . On Sun, Dec 27, 2020 at 9:01 AM Neeraj Yadav < neeru25oct@gmail.com > wrote: Min-8% to Max-20% On Saturday, 26 December 2020 at 13:14:34 UTC+5:30 Vishwas Keskar Welding Manager WELDING wrote: What is  expansion % ? On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav < neeru...@gmail.com > wrote: Dear experts, We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60 kg/cm2 and steam temperature of 392 Deg .Cel. All water tubes of boiler are connected to steam( 63 mm Thk) & Mud drum(40mm Thk) with expanded design of construction. In mud drum it is observed that tubes ( 51X4 mm) are expanded upto 30mm more than the drum thickness and indicating as bulged. we have checked the OD at bulged part and observed 1-2 mm flared and thickness around 3....

Min-8% to Max-20% On Saturday, 26 December 2020 at 13:14:34 UTC+5:30 Vishwas Keskar Welding Manager WELDING wrote: What is  expansion % ? On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav < neeru...@gmail.com > wrote: Dear experts, We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60 kg/cm2 and steam temperature of 392 Deg .Cel. All water tubes of boiler are connected to steam( 63 mm Thk) & Mud drum(40mm Thk) with expanded design of construction. In mud drum it is observed that tubes ( 51X4 mm) are expanded upto 30mm more than the drum thickness and indicating as bulged. we have checked the OD at bulged part and observed 1-2 mm flared and thickness around 3.5 mm Kindly advise weather it is acceptable or we have to replace the se tubes with reference to code. Code of construction is ASME Sec-1/IBR. -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this mess...

What is  expansion % ? On Fri, Dec 25, 2020 at 3:57 PM Neeraj Yadav < neeru25oct@gmail.com > wrote: Dear experts, We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60 kg/cm2 and steam temperature of 392 Deg .Cel. All water tubes of boiler are connected to steam( 63 mm Thk) & Mud drum(40mm Thk) with expanded design of construction. In mud drum it is observed that tubes ( 51X4 mm) are expanded upto 30mm more than the drum thickness and indicating as bulged. we have checked the OD at bulged part and observed 1-2 mm flared and thickness around 3.5 mm Kindly advise weather it is acceptable or we have to replace the se tubes with reference to code. Code of construction is ASME Sec-1/IBR. -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe fr...

Source: The Pressure news ( This newsletter is a publication of ABSA)  Volume 25, Issue 4, December 2020 One issue that is commonly seen on submitted pressure vessel drawings is the indication of a 'design pressure' for the vessel, in addition to the vessel's maximum allowable working pressure (MAWP). Although from a process engineering perspective, a 'design pressure' for the vessel may have been initially important in specifying the vessel's minimum purchase parameters, from a regulatory point of view and within the scope of the ASME code, the vessel's initially-specified 'design pressure' loses its relevance, and indicating it on a vessel drawing has the potential to cause problems. From the process engineering perspective, when a pressure vessel is required to be designed for a certain MAWP, this minimum required working pressure is referred to as the vessel's 'design pressure'. The pressure vessel is then designed to suit the specifi...

Dear experts, We are executing a project for 35 TPH Natural Gas fired Auxiliary Boiler designed for max. working pressure of 60 kg/cm2 and steam temperature of 392 Deg .Cel. All water tubes of boiler are connected to steam( 63 mm Thk) & Mud drum(40mm Thk) with expanded design of construction. In mud drum it is observed that tubes ( 51X4 mm) are expanded upto 30mm more than the drum thickness and indicating as bulged. we have checked the OD at bulged part and observed 1-2 mm flared and thickness around 3.5 mm Kindly advise weather it is acceptable or we have to replace the se tubes with reference to code. Code of construction is ASME Sec-1/IBR. -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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@googlegrou...

Well! the reason behind E3016L -15 recommendation is : SMAW = E306L -  15 - It has lower  FN and in turn  better Notch Toughness values at -196   Deg C . - 15 covering produce much cleaner weld metal( lesser Oxygen , Nitrogen) that is must for  achieving Notch Toughness values at -196   Deg C . On Tue, Dec 22, 2020 at 9:11 AM sela < mechselastine@gmail.com > wrote: Experts Below  requirement given in one LNG project...  Welding Consumables: 1. SMAW Consumables for Type 304L Stainless Steel Impact Tested at -196°C (-320°F). Consumable : ASME Specification SFA 5.4 in Part C, Section II Material Specification - AWS Classification E316L-15 Certification and Testing: ASME Specification SFA 5.01 in Part C, Section II Material Specification - Lot Classification - C5 - Level of testing - Schedule K Testing Requirements for each Lot of electrode: Each Lot of electrode shall be certified with the minimum following testing: - Chemical analysis of weld metal to meet the requirements for c...

Experts Below  requirement given in one LNG project...  Welding Consumables: 1. SMAW Consumables for Type 304L Stainless Steel Impact Tested at -196°C (-320°F). Consumable : ASME Specification SFA 5.4 in Part C, Section II Material Specification - AWS Classification E316L-15 Certification and Testing: ASME Specification SFA 5.01 in Part C, Section II Material Specification - Lot Classification - C5 - Level of testing - Schedule K Testing Requirements for each Lot of electrode: Each Lot of electrode shall be certified with the minimum following testing: - Chemical analysis of weld metal to meet the requirements for classification E316L except the maximum phosphorus shall be 0.03% and the maximum sulphur shall be 0.02%. - Delta ferrite determination per paragraph A6.9 of SFA 5.4. The weld metal shall be a maximum Ferrite Number of 2 FN. - Charpy V-notch impact test shall be performed on the weld metal in accordance with SFA 5.4, paragraph A9.3.1. The weld test assembly shall be ...

Mr. Jose Juan Jimenez,  I agree wholeheartedly, but you need to remember also that the people that are asking these questions are not in tuned with every aspect that is needed.  Now that you brought it to their attention, I'm sure they will understand now, and like I stated previously, I agree with everything you stated. It frustrates me a lot, but I always take a step back and remember what I just mentioned above. Out of all the forms that I belong to, I would have to say that this is the least structured but nonetheless, I am here to help where ever and whenever need be. Keep educating, and stay blessed...... On Sun, Dec 20, 2020 at 7:22 PM José Juan Jiménez Alejandro < jjjimeneza@gmail.com > wrote: I think it is extremely important that colleagues who ask a question in this forum structure it in the most complete way possible, because those of us who are here in the forum cannot be guessing many of the variables of the problem posed, many assume that some issues are taken ...

The bigest risk is to get in contact with carbon Steel or copper alloys Στις Παρ, 18 Δεκ 2020, 06:37 ο χρήστης ilkinhasanov < ilkinhasanov.91@gmail.com > έγραψε: Hi Gents, Is there any specific Standard or Guideline , where I can find storage requirements for Stainless Steel materials (Spool and pipes)? Is there any potential hazards regarding contamination of pipes/spools when they stored in the open air (sometimes under rain-on the wood pallets)?? Regards, Ilkin Hasanov   -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/9791e38f-41c9-44b9-ab93-a0ef86f9a584n%40googlegroups.com . ...

I think it is extremely important that colleagues who ask a question in this forum structure it in the most complete way possible, because those of us who are here in the forum cannot be guessing many of the variables of the problem posed, many assume that some issues are taken for granted, but the truth is that we are not facing the problem you are presenting and therefore we cannot measure the magnitude of this problem, hence the importance of asking exact questions, giving all possible details, these They are: Exact material specifications, building code if any, customer specifications, type of service and a thousand other things that will serve us and will shed light on the nature of the problem and this will give us more data to help them in the most efficient way. possible, you see the problem live, we will have a more or less clear idea as you provide the largest and best amount of information ion, WE DON'T GUESS FOR MANY YEARS THAT WE HAVE EXPERIENCE. Thanks for understandi...