What about fridge compressors?

[Brian the brain]

Most spudrelated accidents are because of human error, not failing pressure rated parts.

Using material past their rating can be done within a reasonable range.

I´ve put 80 bar on 15 mm copper pipe supposed to be `rated`for 6 bar.

QEV´s are rated for about 10 bar, and they hold 60.veen the rubber pistons inside!

So a 15 bar rated vessel should be just fine at 12 dontcha think?

[psycix]

No engineer worth a damn will ever purposely exceed the spec's of a device. Engineers don't look at "Safety margins" as just suggestions. Nor do they ever figure they can stray into the 2x (or whatever) margin built into the spec.

When pushing it to 12 bar, I am NOT exceeding any limits. Well okay, one, the 8 bar limit. But that is not a safety limit. Its a limit to increase lifetime and reliability of the machine because any higher then 8 bar is not needed.
Technically the thing should be able to handle 12 bar just fine.

Any engineer worth a damn will know that when a product is rated up to 12 bar, the product can handle 12 bar without any problems, and has been tested to do so.
The rating has a safety margin and it should not fail under the rating under normal use, as this is the responsibility of the manufacturer.

[Brian the brain]

Could it be that the compressor puts out 8 bar max, áfter regulation?

That would indicate the tank normally holds more..

[john bunsenburner]

I said that in an earlyer post: The max pressure is not the failing pressure but the maximum out put pressure without any modifications

[psycix]

Could it be that the compressor puts out 8 bar max, áfter regulation?

That would indicate the tank normally holds more..

Too bad that is not the case:
There are two pressure gauges on:
One for the tank pressure and one for the regulated pressure.
And they go up to 12 bar, not 8. For some reason.

[john bunsenburner]

Only because a gauge has a limited pressure that does not mean that is the tanks failing pressure, this discussion is really pointless and i am amazed it carries on for so long!

[psycix]

I know the gauges have nothing to do with the tank, but I just wanted to notice that they are ALSO "rated" to 12 bar or more.

I think that my compressor could put out 12 bar. Safely.

[john bunsenburner]

Ok then i think we all agree! Wierd how people can sometimes jsut talk past each other...(ok i am really guilty of that to!)