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How do you picture them rolling a piece of steel 50 meters wide? As far as I know, the widest rolling mills in existence are 5 meters wide.
by tlb 7y ago
How do you picture them rolling a piece of steel 50 meters wide? As far as I know, the widest rolling mills in existence are 5 meters wide.
- rout39574 7y agoThink of it like a paper towel tube. It's a spiral. Single helical weld.
- mlindner 7y agoThey said they would do butt welds, not spiral.
- tlb 7y agoSpiral tube are a bad choice for a rocket. Because rolled steel has the grains largely aligned with the direction of rolling, it is stiffer and has less thermal expansion in one axis than the other. Large forces and temperature changes therefore cause a twisting motion, which can put weird strains on the internal components.
- hinkley 7y agoPillsbury rolls come to mind. The tube is under pressure from the leavening agent, and you apply torsion on the tub until the can ruptures along the spiral seam.
- ryanmarsh 7y agoThat would not go over well with the occupants.
- hinkley 7y agoI recall the rolls scaring the shit out of a fair number of people and those were with the promise of warm, flaky goodness, not hot, fiery death. This of course matters if the seam is weaker than the rest of the metal. I've been assured time and again that you can make welds that are stronger than the rest of the metal, but my lizard brain thinks they're all liars.
- bitcurious 7y agoJust curious - what industry are you in that you know off of the top of your head the max size of rolled steel?
- londons_explore 7y agoNearly anyone who buys sheets of rolled steel eventually finds they can't buy a sheet bigger than a certain size... Same exists for most goods - try to buy a dustsheet to cover your room, and you can't buy one wider than 5 meters without a seam