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PostPosted: Aug 23, 2015 12:15 pm 
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The price for 2304 plate is about $2500/tonne if sourced competitively.


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PostPosted: Aug 23, 2015 12:46 pm 
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Cyril R wrote:
The price for 2304 plate is about $2500/tonne if sourced competitively.

And does the kit exist to bend the plates into 100" pipes? They will need heat treatment according to the data sheets I have discovered on the alloy.
But otherwise it is probably a decent alloy to use - at 3MPa peak presure a 2540mm diameter pipe you would need a wall thickness of about 17.5mm to keep to one third of the UTS of 690MPa.

That comes out about 1090kg per metre - which is going to come like $2.25 million per kilometre for just one of the pipes.
And a 100" pipe would be capable of roughly 5 thermal gigawatts.

$0.90 per kW-km for just the pipes.

80km transport would be $72/kW for just the pipes.

Natural Gas pipeline costs scale approximately linearly with diameter - and naively scaling from that gives us a suggestion of something approaching $12m/km for the 100" loop - which is $960m for the 80km 5GWt loop.
That is roughly $192/kW.

Which isn't too bad really.


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PostPosted: Aug 23, 2015 4:05 pm 
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Ita not rocket science. Either hot bend the plates into pipes and seal weld. Or cold bend and seal weld. I would not worry about a little cold work. 2304 can be used in as welded condition with good properties and corrosion resistance. In fact, heat treatment is not recommended unless you have excessive cold work. In which case full annealing is the only option.


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