Hi racookpe1978,
This is in-service vessel removed from the service for the periodical inspection.
It is UHT horizontal highway LPG unit; thickness required .367", MDMT -20 F @ 250PSI, MAWP 250 PSI @ 115 F.
Two gouges 3/8" in dia .0360" deep and 3" apart on the mid section of the shell bottom...
Hi brilliant guys,
Requires your help to sought out the problem, Welder has accendantly touched the heat treated vessel by air arc gouging of SA-517-F quenched and tempered steel and the gouged is deep about 10th of the base metal thickness. What would be the repair procedure, should I just...
i get the result after tensile test, all fractures were in the weld metal partial cup & cone type fracture, over 110 ksi but less than the required 115 ksi.
we are going to send cut off specimens from the vessel I propose to do impact test for weld metal, HAZ and base metal, tensile test, I wonder do we need bend test on it as well? but on the other hand bend test will be better than ever anyway and also bend test is for to check the soundness of...
As per vendor this is still acceptable to exceed at time teprature it does not effect on grain boundary or mechanical peroperties unless it reaches up to transformation temprature , so we will do lab testing and see if is fail than we can talk to vendor.
unfortunatly production impact test coupons are not on the shelf no more they been thrown away, eventually we are requalifing new WPSs after finding out whether actual exposed material will pass the lab tests, that way is more economical rather doing WPS(s) first if WPSs pass but actual exposed...
Hi all,
I have seen UHT pressure vessel built in 2004 has U stamp on data plate and we are constructing new UHT vessel with ASME stamp on data plate what is the deffrance between U and ASME stamp?
Thank you!
now we are cutting off specimens from the vessel as per thermocouple map most exposed area is top of the vessel that's what location we recommend to take off semples and send out for lab test; is that anywhere code recomendtion for cutt off semple locations for UHT vessel?
We have deciede that we run PQR and PWHT for same amount of time including repair like 8hrs and see if it pass the mechanical testing, and cut off two specimens from the vessel including weld seams send out for impact and tensile testing. I will let ypu guys know either ways.
Thank you metengr,
My openion ASME VIII div I UHT 56 set the minimum requirment for 30 min and it does not say for maximum that mean we can go for 7 hrs?. And as per CWB module 8, it never effects on grain boundaries, grain size and mechanical properties as long as not exceeding above its...
Hi Frends,
we have new constructed pressure vessel made out of SA-517B which is P11B Group 4 shell thickness 0.370" after vessel been fabricated sent out for stress relieving as per engineers issued PWHT instruction sheet heating time suppose to be 350F/hr and soak time 30 minute at 1050-1100F...
I have the Data report which shows head and shall material 1204-9 compare to these days i believe it is SA517F that's what they been using for repair and also it has same composition and tensile strength as 1204-9 but is dose not say any were SA517F is the same material as 1204-9 i just figured...
Hi every body,
i have vessel for internal weld repair it has National Board stamp on it NB 2190 built in 1962 head and shall material 1204-9 no S/N no TCRN number my question is according to the new ASME sec Viii Div 1 what would be the equalization material for repair.
Regards
