And what was the actual question asked ? You stated categorically that air makes the pipes and joints expand more than water. So to use your figures, which stretches the pipes and fittings most - 10 bar or air or 10 bar of water ?I have tried it.
Which has the most energy 10 bar water or 10bar air.
Depends on the format. A ton of feathers may or may not cause injury - if bundled up it will, if loose then it might not. Ditto for the lead - in one lump it certainly would cause injury, but if loose in small pieces it might not. I've probably had a few tons of water fall on me during my life - I'm still here.Which is most likely to kill you when it falls on your head.
A tonne of Lead or a tonne of feathers.
No you haven't.I have tried it.
Expansion of the pipe is not due to 'energy', but force. Change the units if it helps demonstrate the point. 10 bar = 145 psi. 145 pounds per square inch. That's how much force is being exerted on the wall of the pipe.Which has the most energy 10 bar water or 10bar air.
You are joking, right?Which is most likely to kill you when it falls on your head.
A tonne of Lead or a tonne of feathers.
Just what I was thinking.I am not for one moment disputing how much more dangerous performing a dry/air test compared with one using water, however to claim that there will be more pipe/joint expansion when using air at the same pressure as when using water is ridiculous.
The biggest advantage I can think of for wet testing is that the weight of the water will make the pipe less buoyant, and so it will be easier to keep it properly down while the screed is poured. But once the screed has set then that's not a consideration. Common sense suggests that if there's a risk of frost then you either need to empty the pipes (blow them out with air) or put antifreeze in. Blowing them out isn't guaranteed not to leave a low spot that the water will run to and still leave you with a section of pipe that's completely filled and liable to freeze damage.
It can't be an uncommon problem in winter - at least in some areas.
I have tried it.
Which has the most energy 10 bar water or 10bar air.
Which is most likely to kill you when it falls on your head.
A tonne of Lead or a tonne of feathers.
That's a relief.I'll not waste my time.
That's a relief.I'll not waste my time.
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