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  #46 (permalink)  
Old 12-02-2011, 09:00 PM
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Originally Posted by rsfyj
And I am still alive it held 80 lbs of water pressure. I don't think PSI is any different for air is it is for water. In the 1950's everyone had a home made compressor, similar to mine. Only one instance I ever heard of was a fella one Morning needed to pump his tire to get to work. He mistakenly left for work and forgot to turn off the compressor. The pressure built up and blew the plug out of the tank it traveled across the road and embedded in a telephone pole. penetration was nearly all the way through the pole. He did not have a blow off valve on his unit. Any way I'm alive and can talk about the good ole days, That ole rig paid for itself hundreds of times for me.

Look the fact you are still here only means you were lucky, those that weren't so lucky could not have posted that! There have been many people killed and maimed by cobbled up home built compressors, it happens more than you obviously know about. The statement that water pressure is no different from air pressure is so wrong it's ridiculous, the people who have been hurt thought the same thing! The usual argument is that the tanks have some air in them anyway but that does not make them safe since the air is usually at a comparatively low pressure and it's always just a small volume of air vs the water volume. Water tanks filled with high pressure air can, and have, killed people! I have seen two compressor explosions during my years of dealing with these things and I have seen several safety bulletins dealing with accidents that have occurred over the years and yes a couple of them involved using water tanks. I saw a 40 gallon tank peel the top of a Mack truck open like a sardine can and a 60 gallon tank took almost the entire back wall out of a two car garage, the truck incident left a man crippled and deaf in one ear and these accidents were using compressor tanks! Both had been repaired by welding cracks or holes in them which is another real NO-NO, NEVER weld on an air tank. You were lucky, nothing more, and what you had was extremely dangerous so please don't go around suggesting other people do the same thing!

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  #47 (permalink)  
Old 12-03-2011, 01:15 AM
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Nice Oldred......2X.

Guys using water tanks for air tanks rank right along with nut cases.

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I don't think PSI is any different for air is it is for water
I don't know what school you came from but this is blatantly wrong. You have no idea of what force compressed air can do. What do think a bomb is?? air compressed by rapid heating of the air. What do you think makes 600 hp in our motors?? air compressed buy burning fuel /air mix.

Use a tank designed for air pressure for air, use a water tank for storing shower water.
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  #48 (permalink)  
Old 12-10-2011, 07:55 PM
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Well, after pricing the twin tank for that compressor at $252 w/o shipping, I decided the $59 12 gallon tank from Surplus center would have to do, and I just need to build a framework for the pump and tank.. So I got some 1x1 tubing, some 1/2" rod and some cotter pins, washers and 2 8" ball bearing lawn mower wheels. Decided 6'x3' was just about right, but after putting it togther, I think it's too big for just 1 pump.. so I'm thinking about adding another engine/ pump, running at a 125 PSI cut in and the other just above that , so the pressure would never drop below 125 PSI
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