So today I try again a leak test before starting welding, yesterday pressure was hold for 2 hours and today it already lose 1 bar every few seconds...
This really starts to get on my nerves, I cannot be confident with a system like that, going from airtight to not airtight anymore over a night...
Yes but not sure this required tightening force is normal.
Someone with a french cylinder (mine is german) with a similar gasket tells me he just need to tighten about 10 degrees after initial tightening by hand.
I had to tighten mine much more than 10 degrees, so there may still be an issue...
That`s what I do, I know how it works.
We are talking about a sudden massive leak when the cylinder was fully open, clearly audible (as when you crack the cylinder), and clearly felt by hand.
As said it was fixed by replacing the gasket, but given the tightening force I had to apply again (not...
It really depends on the sytem used, the required torque will be different if it is metal to metal or metal to ptfe gasket and maybe other factors depending on the design and materials.
I have replaced the gasket and have no leak again, but it was necessary to apply some significant torque...
I have looked for diving cylinders videos after reading your comment, indeed the tightening torque used in the video below at 1"50 seems really small !
I was told the deformation of the gasket clearly indicates way too much tightening.
I was thinking I may have "slightly" overtightened, but wouldn't have imagined it was "that overtightened".
I have just stopped tightening as soon as I have realized the resistence felt in the wrench was not...
After 3 days testing (few hours per days) I had a sudden inlet leakage at the regulator (very audible).
I wonder if I may have tightened too much, or if new threads can take shape over the first days and need to be tightened again to recover a perfect sealing.
After cleaning the connections...
If I do it by maths (Gay-Lussac law) a 200bars cylinder at 15°C will go to 206bars at 24°C (versus approx 208 bars read on the regulator gauge).
So it may have not been overfilled.
I will not bother about this small excess of pressure then, as nobody seem to think it could be a danger.
Time to...
Hello,
Newbie question I have been searching about for hours already:
I have an argon cylinder filled at 200bars at 15°C and have bought an argon/CO2 regulator advertised as being "meant to be used with 200 bars cylinders".
The regulator is a brand new EWO (german brand) 120.470 (good amazon...
I'm new to TIG welding. When trying to learn about something new I like to join both french and english speaking communities, so here I am for some enlightening TIG discussions :)