Oxygen regulator still shows pressure after draining torch

[Black_Moons]

Random thing iv noticed: While venting the actylene tank, the output pressure of the regulator goes *up* as the input pressure goes down.

Result? If you had it at 10psi, it might go over 15psi before the tank is emptyed. Allways insure your acetylene regulator is set 'low' (5psi or less) before venting!

[MuellerNick]

The car on jack stands analogy was lost on me, too.

He forgot to say, that he is releasing the tire pressure.


Nick

[Evan]

Result? If you had it at 10psi, it might go over 15psi before the tank is emptyed. Allways insure your acetylene regulator is set 'low' (5psi or less) before venting!

The critical pressure for self detonation for acetylene is actually about 30 psi. 15 psi is always used to give a safety margin.

[Herm Williams]

IMHO after twenty years repairing regulators and torches it does not make any difference, close the tank for safety close the valves on the torch for safety and store the torch. if you have a leak the gauges will go to zero, most welding sets have a small leaks somewhere, most of the time where the regulators fasten to the tanks (small nicks,scratches etc on the seats). Find it with soapy water tighten the fitting to stop the leak or just live with a very small leak. my two cents worth.
re

[macona]

It's a bad gauge. Most weld shops sell replenishes. Usually under $10.

[GKman]

I've never seen anyone who preforms the ritual described above putting their car on jack stands after driving. Isn't it the same principal?

Because all that weight will wear the springs out!

[ADGO_Racing]

Because all that weight will wear the springs out!

We actually disconnect the shocks and springs on the race cars, and strap them down to blocks in the hauler.

If we didn't we would put more miles on the shocks and springs going to and from the track, than we do at the track.

[Black_Moons]

Spring wear, Fact or fiction?

I know lots of people mention 'replaceing' the shocks in a car after so many miles as the suspension becomes.. 'loose'?.. Poor in any respect.. Not sure if its the springs fault, or the dampeners however..

[Toolguy]

When springs wear, they sag. The car sits lower. When shocks wear, the car continues to bounce up and down after a bump. It's like riding in a rowboat.

[Evan]

Springs wear all right. You haven't been over the Yanks Peak 4x4 trail. There is a 15 kilometre section called the twister as it will twist your frame and while it's at it break the springs. It broke one of the front coils on my Ranger about a week after that outing. Spring steel accumulates fatigue damage when it is repeatedly stressed over approximately one half the yield point. Below one half it is considered to not accumulate fatigue at all. The closer to the yield point the faster the fatigue builds up until it fails at some value well below the yield point. As the fatigue accumulates the yield point moves downward.