Metengr - I was hoping you would see this post. I do not have the certs in front of me, but several are dual grade SA-105 /SA-350 LF2. I can ascertain the heat treatment from most of the certs; however, shouldn't the CMTR contain reported tensile for both the as-forged and any heat treat...
This may be a very silly question, I apologize in advance.
SA-105 (2007 Ed) has Tension Test requirements in the as-forged and one from each heat treat charge (if heat treated) para 7.3.1 and 7.3.2 respectively. I am reviewing CMTRs for some SA-105 and there is no real information as to what...
Not to take this on a different course but I was told that Uphill welding requires more heat input. Any truth to this statement?
Some of the new hybrid short arc methods (STT and RMD) use a vert down root progression. I expect this is for speed but wonder if distortion is something...
Dcasto - I thought hydrogen but typed nitrogen. Regardless, you made an excellent point in your previous post. Sorry to clutter this thread.
I am not familiar with when you would want to use a N2 pressure test in stead of hydro test.
Again, sorry for my previous clutter.
Wouldn't you want to incorporate the static head of the N2 into the calc for hydro test and then just use H2O for the test itself? I would suspect a slightly higher test pressure. Am I missing something very fundamental?
Not that my opinion really matters, but I agree with JR97. Hydro when successfully passed is non-destructive. Section V NDE does not affect the vessel regardless of the test results.
Sorry, perhaps I didn't word the original question properly. I understand the qualification ranges but I am looking for direction in the Code as to what to do with a sample coupon that has two different metal thicknesses. My AI has advised that the lab should machine the thicker to match the...
I would like to weld a P1(2.125”) – P8(1.5”) full pen groove coupon with dissimilar base metal thicknesses for a PQR. My test lab is not sure how to handle this. I cannot seem to find direction per ASME IX. I expect that the lab has to grind/machine the thicker material to the thinner T...
Metengr -
Thank you for your continued patience and input.
My test lab told me that their 262 Practice E incorporates 1 in² sample. Should I run two tests? One on the P8 HAZ and one on the P8 base? Or can I assume the P8 HAZ to be the most severe case?
Doing some more research I still 'think' that 304L would be ok in the situation I have described above. The following is from Sandmeyer Steel's Spec sheet for 321 & 347
"While Alloys 321 and 347 continue to be employed for prolonged service in the 800 to 1500°F temperature range, Alloy 304L has...
We are now looking at possibly using 347 as nozzle material. Any comments on this material? The same sensitization data I mentioned above re: 304L lists 347 sensitization range of 925 - 1050°F for more than 1000 hours. Our PWHT is 1100°. Thoughts?
Trying to keep things as uncomplicated as...
Metengr - thank you for your continued input!
We had thought of maybe decreasing our PWHT by 200°F per table AF-402.2 and welding the P1-P8 joint and then PWHT the whole damn thing but because we have impact testing I believe this shoots our current WPSs that are being used on the P1-P1...
Metengr - thank you for the reply. I understand the liner of the shell itself does not require PWHT. I believe I was a bit unclear above - I mentioned it so that it was a little more clear (like mud, right) as to what we are trying to accomplish. We will install the liner after we have...
First - Just wanted to say thanks to all of the contributing and knowledgeable folks that help each other here. Lots of great info.
Onto my questions -
We are building a very thick SA-516 gr 70 vessel to ASME VIII (Div 2). We will use a stainless liner and all nozzles will be 304L pipe. Due...
Fatcobra -
There is some good advice here. You mentioned Procedures and also talked about welder quals. Be sure you understand the Code difference between T and t when it comes to your WPS. T is the material thickness and t is the deposited metal - see also QW-451.1.
As long as your...
I am qualifing a Procedure that is impact tested IAW Section VIII Div 2. Material is P1G1 welded to P1G2.
Reviewing Article T-2 and AM-218.2 it is not clear to me which or both HAZ(s) requires impact testing. Can anyone offer me any further direciton? The wording is "WPQ shall include...
