Pipe pressure rating

.

Yes please.

I will trade you 2 Camels, 5 Chickens and a Goat.

Nick

I'm sure there's no harm done, but just in case I checked the mans profile to see where he lived, no profile. But nobody lives anywhere near me so no probs.

Done!

Just the Goat would do

I think it is too much guess work for me to contain this kind of thing, I've done a hell of a lot of searching and everything is so vague, I'm not even sure what pressures I will attain until I do it. so I think I may just do hydroforming instead and do the other experiments.

Thanks for everyones input, even if it went completely off topic

I don't know if anyone here remembers CiX, but I'm put in mind of a chap who went by the moniker of Nanos.

Those are exactly the sort of experiments he went for.

Neil

Shoot me down in flames if I've got it wrong but I think the maths shows there isn't much to worry about here.

Joe's very impressive capacitor stores 8KJ of energy. In comparison a kg of hard coal stores about 30MJ. His capacitor contains the energy equivalent of less than 0.5 grams of coal.

What makes the capacitor fun is that the energy can be released very quickly. Whilst spectacular, the effects of the discharge will be short range because the amount of energy in the system is relatively small.

I shall sleep easy in my bed tonight!

Regards,

Dave

More power Igor!

Frank

Way above my head but does Joe page 1 work for or have anything to do with CERN or the Large Hadron collider or in any way connected to Jules Verne's time machine story ...

**LINK**

Just can't get my head round this one... ... no insult intended of course.

George.

Sounds like a candidate for that BBC program Diane posted about last week

Edited By JasonB on 23/11/2015 20:17:57

Perhaps Joe has come up with a very complicated way of coating the inside of a steel cylinder with another material (from the wire).

Edited By V8Eng on 23/11/2015 20:20:53

Edited By V8Eng on 23/11/2015 20:21:37

Hi Joe

You will find some freely available info for protection against projectile forces for your containment apparatus during failure conditions from the the US military ballistics and nuclear webs, there's many to shake a stick at, but have found them the greatest valuable resource in my former life, I'm sure if your brave enough to tackle these activities in your shed per say, then trawling some of the more sensitive web sites around would be a breeze and I'll say no more.

Good luck

I don't think I'd experiment inside, but it shouldn't be a problem outside. Personally I wouldn't bother with trying to contain the results. I suspect it'll be rather unspectacular, a very hot wire that will melt and break the current, albeit possibly with some arcing. Unless the capacitors are pretty special with very low ESR and ESL and the wiring is also very low inductance I doubt that the currents, or di/dt, will be anything like those mentioned.

Andrew

In any case how are you going to measure the pressures you expect to get? I cannot see a gauge doing it. Perhaps a copper disc being crushed but what parameters are you going to compare the crushed disc to.

Clive

Yeay, finally some people who understand what I'm doing.

Dave - yep completely true, the energy I'm dealing with is so small that it's not much use, as in my example it would power a kettle for 4 seconds, or the same energy in 1/19 of a cream cracker, but because it can be discharged so fast the results are spectacular when shorted through something like a wire.

George- If only I were, but unfortunately I'm unemployed at the moment, quit my stressful machinist job.

Jason - That ain't such a bad idea, but I'm not sure if it could work for me or against me, not sure if I trust the BBC.

V8eng - This method is actually the most efficient method for producing nano particles, something I hope to achieve and prove.

Nick - Probably going to be me later on in life

Rufus - Thanks for the advice, I love researching such documents, still going to make the vessel, but to hold water like a bucket, hydroforming is what I'm doing instead.

Andrew - you caught me, I wondered if anyone would question these numbers. esr and resistance is about 0.1 ohm total, so about 9kA, still a lot of current, but I am using electrolytic's, so quite high ESR's compared to film capacitors. I do have a bank of films that's 34kV, 300J, esr 0.4ohm so peak currents of 85kA, but that's in a different project.

Clive - This is something I'm not sure I can do accurately. Assuming it's in a bucket of water. I could put a copper disc at the end tube dipped in the water, an approximate calculation on the force required to do puncture the copper disc would be made, then see if it punctures.

I am not sure about this at all. The energy release is very high but over a very short time period. OK the theoretical pressures are high for a fraction of a second but then nothing. By the time the pressure vessel starts to respond the pressure will have gone. Perhaps a tin can will do.

Or have I got this all wrong.

JA

Edited By jason udall on 24/11/2015 16:04:03