| Re: Spheres
Quote: (Originally Posted by SteveL) 
he askes about steel - no it expands when pressureised and the coating (enamel) cracks off so it has to be some stainless material. I'm not really following you on the expansion issues. Sure the wall thickness would need to be a shade thicker than standard but it shouldn't be a biggie and if they were made from less expensive steel, made so the valves screwed in rather than were welded and painted you may well stand to save a fortune in production costs. If my rough order of magnitude costs are anything to go by you could toss them away every couple of years.
Thoughts?
__________________
WARNING: I contain occasional coarse language, extreme sexual references, nudity, and adult themes, which may offend some people - Usually churchy types. |