Materials & Welding

Dear Experts, What is the acceptance criteria for porosities in Aluminum welds subjected to Radiography Examination? I am having only 3 porosities scattered (1.2mm dia.max) in the entire weld length of 350mm coupon. Coupon thk = 4mm Welding process - GTAW Require your valuable inputs. -- 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/CAMpWL2q_sMYR5rPWJLW497pNN7XkUPs7R2grHAxkZG87fgHhHA%40mail.gmail.com .

Dear All, Pl clarify, how to take hardness measurements on welds after PWHT for SA 516 Gr 70 material. Is there any code reference? Thanks& Regards, Venkatramulu -- 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/CAF98%2BdHYCPSu_LL3RaVz%2B7Q10FSw8dED8kXGn_y9oWQyFoTs4A%40mail.gmail.com .

Dear Sirs,  Thanks for your support. Question:  Preheat of  >  95C (200F) is not used but the weld is made with multiple passes. Is PWHT required for a weld joining P-No.1 materials, when the control thickness is less than or equal to 25 mm (1 inch) but the nominal material thickness is greater than 25 mm (1 inch)?      Answer: Since weld is made with multiple pass so PWHT is not required for P-No-1 materials. Reply ==> Since  the exemption shall be based on nominal thickness . I understand that this case (see attached picture)  PWHT is required ( because nominal material thickness is greater than 25 mm (1 inch) -& preheat 95 deg C not applied ) . Please correct me if I am wrong. Thank you. Could you please advise me: which thickness, Control thickness or Norminal material thickness, shall be used to determine PWHT requirements & exemptions as per ASME B31.3 ?  Answer: Its control thickness which decides the requirement of PWHT but the exemption shall be based on nominal...

Question:  Preheat of  >  95C (200F) is not used but the weld is made with multiple passes. Is PWHT required for a weld joining P-No.1 materials, when the control thickness is less than or equal to 25 mm (1 inch) but the nominal material thickness is greater than 25 mm (1 inch)?      Answer: Since weld is made with multiple pass so PWHT is not required for P-No-1 materials. Could you please advise me: which thickness, Control thickness or Norminal material thickness, shall be used to determine PWHT requirements & exemptions as per ASME B31.3 ?  Answer: Its control thickness which decides the requirement of PWHT but the exemption shall be based on nominal thickness.  Here for P-No.1 , for all control thickness its exempted subjected to the requirements of Column 4 of Table 331.1.3 c is met. Similarly for P=no.3 materials PWHT is must for control thickness greater than 16mm but for lesser thickness it can be exempted subjected to the requirements of table 331.1.3. Regards, Atul Kh...

Dear Experts,   Please  one of our Customers want to weld Pad Eyes to a Casing and also weld a Stop Ring and a Hammer Union to the Casing. The following are the materials: Casing Material: N80 and it is 0.4” Thick and 9-5/8” OD; Stop Ring: AISI 4140 Pad Eye Material: ASTM A 36 and 5/8” Thick Hammer Union: WECO 2” 1502 The specification for the job is API 5CT. We do not have a qualified WPS to do this job. Please advise what materials we can use to qualify the WPS for this job. Any that has a qualified WPS for this kind of job can please send it so that we can use it as a go-by to qualify the WPS for my company.   Thank you for your support.   Regards,   Michael Ofejiro AWS CWI, API 510, NACE CIP Level 2   *** WORLEY GROUP NOTICE *** "This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this email...

For Sour Gas Service Destructive testing is must ​Regards, ​ ​   Bathula AnilKumar Engineer ‑ Quality Assurance (Mech) Oil & Gas Email: bathula.anilkumar@alturki.com Mobile: +968 99351283 CPN: 1873 From: materials-welding@googlegroups.com < materials-welding@googlegroups.com > On Behalf Of PRASANTH RAJAN Sent: Monday, November 4, 2019 7:52 PM To: materials-welding@googlegroups.com Subject: Re: [MW:30205] Mechanical test for Welder qualification   So we have to all the destructive test as mentioned in Api 1104 section 5.4??????   Pls confirm    On Thu, Jan 31, 2019, 5:34 AM Muhammed Ibrahim PK < ibratech@gmail.com > wrote: Gents,   Is it mandatory mechanical test qualification for welders as per ASME B31.8 sour gas service requirement as per clause B823.2?.   Qualification by RT is acceptable ?.   Thanks & Regards Muhammed Ibrahim PK -- https://materials-welding.blogspot.com/ https://ww...

It's highly depends on the place of uses On Mon, Nov 4, 2019, 16:44 Chiranjeevi A < chiranjeevipuvvula@gmail.com > wrote: Dear Experts,   For cold insulation we have contraction joints where we use butyl rubber sheet used as external bellow. But cost effective we are using EPDM rubber sheet which is from same family and can be folded same as butyl rubber.  Can we use EPDM, experts share you opinions -- 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/CAN4%2Bm0ysfi6TR3DVmpNoQMS%2BtO9E9uUAuvFV08v9_mhw0x8VWg%40mail.gmail.com . -- https://materials-welding.blogspot.com/ https:/...