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Using new propane tank for compressed air

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Rob

03-29-2001 11:17:00




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I was wondering if a new propane tank would be okay to use for a compressor tank. The info stamped on the tank is: 100# Propane
DOT. 4BW240 1-01
RC549509 DB
M4499 Manchester
WC 238# TW 69.4#
DT 9.6

I figured out the TW is tare weight, And M4499 is manufacture date. I guess Manchester is where it was made. Does this tell the Max pressure? I figure it would be okay to weld the fittings on, since it has never been filled with propane. The price is not bad - 80 bucks at Lowe's. Thanks for any suggestions,

Rob

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Rob

04-03-2001 07:59:12




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
Thanks for all your input - I appreciate it!



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Neil

03-30-2001 05:50:02




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
Any good ideas for a drain, other than drilling and or welding a connection at the bottom?
Maybe mounting the tank upside down?

Seems a 28Gal tank for $79 is not bad.
Been looking for a 40 gal, but the best price I have found is $150.

A would like to replace my rusty old one BEFORe it lets go!



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Ray,IN

03-29-2001 17:55:13




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
Johnbob answered the psi question, so I'll try my thoughts. The tank will serve well for air pressure. A new propane tank doesn't present any different welding hazards; however the welder is going to modify the tank properties, ie.,strength, corrosion resistance,and usability. The opening is 3/4 tapered NPT (standard pipe thread). I made a new compresser tank from one (used-free) and used only the one hole, no other connections. All that is needed is a 3/4 tee and close nipple(XXblack). The rest is easy.It takes the old sears unit 10 minutes to shut off at 100psi though. Thats my experience!

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Scott Green

03-30-2001 05:11:47




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 Re: Re: using new propane tank for compressed air in reply to Ray,IN, 03-29-2001 17:55:13  
Yes Ray , I had bought a kit for turning a propane tank into a air tank. The kit converted like you had described. I fill with air up to 100 pounds.



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Dave Dragonette

05-14-2001 09:31:10




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 Re: Re: Re: using new propane tank for compressed air in reply to Scott Green, 03-30-2001 05:11:47  
I have been looking for months for a conversion kit for a propane to air setup...I saaw them once and never since.. If anyone can tell me where to get one ,please e-mail me...

Dave Dragonette
[email protected]



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Dave Dragonette

05-14-2001 09:31:09




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 Re: Re: Re: using new propane tank for compressed air in reply to Scott Green, 03-30-2001 05:11:47  
I have been looking for months for a conversion kit for a propane to air setup...I saaw them once and never since.. If anyone can tell me where to get one ,please e-mail me...

Dave Dragonette
[email protected]



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Johnbob

03-29-2001 17:16:27




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
Most L.P tanks are rated at 350 psi. If you want to weld on a used tank take out the valve out and put a pipe to the bottom of the tank and attach to an exhaust pipe of a gas engine.Carbon monoxide will not explode.



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ltf in nc

03-29-2001 14:36:12




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
I do not recommend using the tank but this will answer some of your questions.



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Neil

03-29-2001 13:36:14




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
Can someone tell me how many gallons a 100 LB propane tank would be?
I need a new compressor tank, and have seen these at Menards for about $80 also.



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Paul

03-29-2001 19:09:18




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 Re: Re: using new propane tank for compressed air in reply to Neil, 03-29-2001 13:36:14  
I think the 100 LB tanks are approximately 30 gallons. Measure it and calculate the volume and multiply the cubic feet times 7.48 (gallons per cubic feet).



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Jerry B

03-29-2001 11:38:31




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 Re: using new propane tank for compressed air in reply to Rob, 03-29-2001 11:17:00  
The only propane tank I have used to make compressors from were the large silver ones found attached to the front of mobile homes. They are thick enough to weld to BUT drill a hole in the "bottom" first and tape over it. Fill with water before cutting, welding or anything involving heat of open flames.



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