Thank you, it does seem like a bit of a rabbit hole to try to nail something down for fatigue.
Is the same true for the yielding stress or is that more stable?
I am trying to estimate the rough yield strength and endurance limit or fatigue behavior for a 316SS fillet weld. I really just need rough (though realistic and up to date) numbers but I am having trouble finding a resource for this. I know the ASME BVPC has SN curves for 300 series welds...
Last question but does anyone have good resources, like a forum or what to search for, when looking for high quality small job stainless steel pipe fabricators? I think we need more than just a machine shop who also welds, we need someone who specializes in this stuff. We are west coast.
Thank you for all the input, it is really helpful because these codes are not my bread and butter so I don't know how much adherence is status quo.
I'm looking at alternative vendors today.
Yeah I agree on the O2 clean.
I actually just got off the phone with our vendor (I made this post ahead of our conversation with them)
This is for a small contained piping system where each piece would 1.5 feet or less long, and their take was that with such small pieces they wouldn't be able...
Gotcha, so this would be for O2 at ambient temperature.
As for the type of weld in question it is just for circumferential or girth welds connecting various butt type pipe pieces together.
But it sounds like in your experience full penetration in this situation is both common and easy to do.
Thank you,
What I'm reading there is for Girth welds in normal service incomplete penetration is acceptable as long as it less than 1.5" of the length of the weld.
These pipes don't have any complete penetration. They are nicely welded on the outside, but on the interior there is just a seam...
We had a vendor construct a small 2in piping system spec'd to ASME B31.3. MAWP is 200psig.
The pieces came back and didn't have full penetration welds for joining things like elbows and T-sections. Meaning they had a solid exterior weld but on the inside you couldn't see the weld, only the seam...
On page 167 of my 2017 edition of ASME B16.5 they give flange dimension specs for different types of flanges.
I am using a lap joint flange, and one of the dimensional columns is "Minimum Thickness for Lap Joint", however I can't find what dimension this is actually referring to.
It could be...
