Materials & Welding

For long piping(Carbon steel, alloy steel), butt welding of large diameter(219mm OD TO 606mm OD, THK - 18.26mm to 42 mm )pipes is carried out.  For PWHT of these butt welds, what are the parameters shall be considered for effective PWHT? -- 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 post to this group, send email to materials-welding@googlegroups.com . Visit this group at http://groups.google.com/group/materials-welding . To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/123817e2-66c9-440c-9da6-21d6b616ce26%40googlegroups.com . For more options, visit https://groups.google.com/d/optout .

Dear experts and seniors. If groove weld can cover for fillet weld, AWS D1.1 , can it cover for lap joint? Cause I read some where else in AWS D 1.1 that lap joint weld can be consider as fillet weld. Thanks all -- 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 post to this group, send email to materials-welding@googlegroups.com . Visit this group at http://groups.google.com/group/materials-welding . To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/75138ccf-9864-45ce-8198-2977e5a9da56%40googlegroups.com . For more options, visit https://groups.google.com/d/optout .

I agreed Sakori... I have added just my exp. This is not rimmed/ killed steel pblm. This is typical carbon/pearlitic segregation. i have exp with SA 516 Gr.70 plates. we have done impact, tensile on particulor location in raw material stage. it was found to meet the specification. your photo are seems to be minor. defenetly.. it will not lead to any crack. However..it shld be communicated and eliminated frm supplier end. Regards Thiyagarajan M Welding Metallurgist. On May 25, 2015 8:46 AM, "Alan Denney" < alan@denney1.freeserve.co.uk > wrote: Dear Meisam Shokri Arfaei   Many thanks for this information and for the macro. I am very keen to find obtain examples of case histories which I can show to colleagues so that they are aware that it is not a new problem, but so far  I am not finding any information in the literature. Are you able to help here? If anyone knows of research into this I would be interested to hear – maybe someone's thesis?   Best ...

my code apply is AWS D1.1 for structural steel construction Thanks Mr Ken Waterhouse. Vào 13:29:21 UTC+7 Thứ Bảy, ngày 23 tháng 5 năm 2015, Ken Waterhouse đã viết: Hi Jerry,  Can you clarify to which code or standard the WPS is written?  Regards KW On Saturday, May 23, 2015 at 5:54:14 AM UTC+1, JERRY TUAN wrote: Dear experts,  i have one question, and I need your help. Thanks first My WPS is SAW, qualified for tube OD = 2000mm spiral welding pipe sheet pipe. my WPS is for splicing 2 pipe ( that mean you connecting 2 pipe together )  the joint design is X bevel and the layer step of welding is:  1. GMAW at root 2. cover out side SAW 3. cover inside SAW so now if I want to change the step welding layer to: 1. GMAW at root 2. cover inside SAW 3.cover out side SAW  and all other parameters are not change =>> so my question is . Do I need to requalify my WPS , OR I just rewrite WPS and keep the original PQR,no need to test PQR again THANKS FOR YOUR HELP. J...

my WPS is according to AWS D1.1 . for structural steel construction . So, if I do not need to test again PQR , I just rewrite welding process layer . Thanks all experts Vào 23:35:43 UTC+7 Thứ Bảy, ngày 23 tháng 5 năm 2015, kannayeram gnanapandithan đã viết: As long as if u are not exceed deposited weldmetal thickness for each process u need not qualify On 23-May-2015 2:30 pm, "anosh wankhade" < anosh_w...@rediffmail.com > wrote: Dear Jerry, In case the WPS is qualified according to ASME section IX, no need to re qualify WPS. Just make necessary changes in WPS and use to same PQR. Regards, Anosh    From: JERRY TUAN < jerr...@gmail.com > Sent: Sat, 23 May 2015 10:24:11 To: material...@ googlegroups.com Subject: [MW:23014] requalified wps aws d1.1 Dear experts,  i have one question, and I need your help. Thanks first My WPS is SAW, qualified for tube OD = 2000mm spiral welding pipe sheet pipe. my WPS is for splicing 2 pipe ( that mean you connecting 2 pipe toge...

Dear Meisam Shokri Arfaei   Many thanks for this information and for the macro. I am very keen to find obtain examples of case histories which I can show to colleagues so that they are aware that it is not a new problem, but so far  I am not finding any information in the literature. Are you able to help here? If anyone knows of research into this I would be interested to hear – maybe someone's thesis?   Best wishes   Alan Denney   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of meisam shokri arfaei Sent: 23 May 2015 11:41 To: materials-welding@googlegroups.com Subject: Re: [MW:23024] Plates cracking down the centreline following welding   This is directly related to the quality of the base material. Lower quality plates (often rimmed or semi-killed) by means of more undesirable alloying elements which produce adverse intermetallics, carbides, sulfides and so on, are more sensitive to this cracking. If you cu...

Dear All, Code                   :  ASME Sec VIII Div.1 Shell Material       : SA 516 Gr.60 Nozzle Material    :  UNS N06625 UCS 56 (c) When pressure parts of two different P‐Number groups are joined by welding, the postweld heat treatment shall be that specified in either of Tables UCS-56-1 through UCS-56-11 or Tables UHA-32-1 through UHA-32-6, with applicable notes, for the material requiring the higher postweld temperature.  My question is regarding the PWHT requirements for above vessels, 1.Does the shell to nozzle weld  edges to be buttered by Er NiCrMo-3 before PWHT and groove welding by Er NiCrMo-3  after PWHT?  or 2.Or a PQR of dissimilar joint P1 to P43 with PWHT (of P1 requirements) can be used directly? U NF 56 : Does not address such dissimilar joint UNF-56 POSTWELD HEAT TREATMENT (a) Postweld heat treatment of nonferrous materials is not normally necessary nor desirable....