Materials & Welding

Normally either from the Process or Mechanical Designer will provide the MDMT ( Minimum Design Metal Temperature) - it is the lowest temperature attained by the Material either due to Process conditions / Environmental conditions / upset conditions. So Impact testing has to be performed at MDMT. Charpy Impact values for Full size specimen (10x10x55) will be specified either by the Design Code  or superceded by the Client specification if provided. Test Temperature MDMT. A Snap shot of ASME B 31.3 is given as example below. "> Thanks & Regards J.Gerald Jayakumar On Wednesday, 6 December, 2023 at 09:34:42 am IST, Prathamesh Patkar <prathameshpatkar@swastikindustriesindia.in> wrote: Dear Sir, Thank you for the response. I had one more query. Are there any acceptance criteria for minus temperature? eg... the spe...

Dear experts, Is it mandatory to qualify PQR with pipe and flange.? Why can't we qualify with pipe only. What is the limitations here to do so. Thanks -- 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/CAL2iHPvcgmWqje6V5d4g8iojz_p%3DXHmB7LCHG2vfQWbzUs33GA%40mail.gmail.com .

Dear team, Can anyone clarify me , How we decide the electrical parameters of WPS. Will it be the same as PQR or what is the limit.  Thanks -- 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/CAL2iHPssh%2BebeDtvBzxFT%2BuXSnJ%3DNcs2hwtUxbFt8V04eC8%2BWQ%40mail.gmail.com .

Dear Sir, Thank you for the response. I had one more query. Are there any acceptance criteria for minus temperature? eg... the specimen should sustain 12 J impact at -20c in order to qualify.  On Mon, Dec 4, 2023 at 5:30 PM 'james gerald' via Materials & Welding < materials-welding@googlegroups.com > wrote: A Charpy Impact test is not required for specimen thickness less than 2.5mm. Subsize specimens can be machined from the Pipe OD 60mm and thickness 5.5mm. Please check with the Mechanical testing lab. Please refer to ASME Sec.IIA section SA-370. If specimen thickness exceeds 80% during machining from the original size, temperature reduction according to the Applicable Code shall be applied. For subsize specimens Impact values refer to snap shot. Thanks & Regards J.Gerald Jayakumar On Monday, 4 December, 2023 at 05:06:28 pm IST, Prats < prathameshpatkar@swasti...

Minimum Leak Path MLP is the shortest distance, from the Root to the center of the weld. It is normally equivalent to Tube thickness.  Specified by the Designer. Thanks & Regards J.Gerald Jayakumar On Monday, 4 December, 2023 at 05:06:47 pm IST, Jenish Mistry <jenishmistry1992@gmail.com> wrote: Dear sir, MLP value shall be as per Design requirement or client specification/requirement. Design concurrence required if client specification is silent for MLP Value. On Sat, Dec 2, 2023 at 11:51 PM PARAI Reaction Channel < saravanshyla@gmail.com > wrote: Dear Sirs, We are fabricating a heat exchanger , designed as per ASME Sec VIII Div-1, 2021 Ed.  with SS 304 Tube to Tubesheet welds, designed as per ASME Sec VIII Div-1,  UW-20.1 "C " joint , strength weld type with 2 passes of GTAW welded f...

    Dear All,   Is there any welding code for WQT qualification , with out WPS.   Regards, Ch srinivasarao. QA/QC.

Dear expert, I have one concern... IS 2062 plate has rejected in tensile test at Lab. So can we retest the same plate again for revaluation? iF yes, where it has been mentioned in code??