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Pressure testing fuel oil tanks.


 
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Fred Werring
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PostPosted: Wed Mar 25, 2020 3:27 pm    Post subject: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

Want to test a couple oval 275 gallon fuel oil tanks before I fill them with diesel.

Thinking about pressurizing with air to 5psi and using soapy water on the seams.

Sound right to you?

Also thinking I'll weld some angle on the bottom of the pipe legs to give them a skid to rest on...anybody see a problem with that?

Thanks
 
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Janicholson
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PostPosted: Wed Mar 25, 2020 3:31 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

Seems fine with me you will see a little bulge at 5 psi, but no worries. The soap idea is fine. Welding a "foot" on the legs is Ok if it will stay here it is. If you skid the tank, even empty, it is likely to bend the legs unless diagonal braces are used front to back, and side to side. Jim
 
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David G
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PostPosted: Wed Mar 25, 2020 3:38 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

You really only need a few inches of water column, 5PSI is a bit, maybe 1
 
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Glen SW Wi
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PostPosted: Wed Mar 25, 2020 4:19 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

Don't use any more pressure than is required to make water come out of obvious leaks. The tank was not designed as a test vessel. An explosion of a tank at low pressure but high volume is not a sight you would want to see. Used to have a movie in the AF that showed a section of the Atlas missile fuel tank being shot with 22 bullet. The tank was pressurized to only 12 psi. Looked like someone set off a stick of dynamite inside it. Supposedly a missile was blown up when someone shot it during transport Sandiago to the Cape.
 
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MarkB_MI
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PostPosted: Wed Mar 25, 2020 4:50 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

5 psi is 720 lbs per square foot!
 
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unc
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PostPosted: Wed Mar 25, 2020 4:57 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

If you are testing with air, soap and water, 3 PSI or less will be plenty. unc
 
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moresmoke
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PostPosted: Wed Mar 25, 2020 5:55 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

Just enough air to make it pooch a little. Probably just 1/2 psi. That?s 0.5 not 1 or 2. Seams are the least of your worries. They usually rust through on the bottom, especially the older ones that have an end draw and not bottom draw.
 
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jon f mn
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PostPosted: Wed Mar 25, 2020 6:06 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

I usually pump them up just til they bulge a little. I would use a spray bottle of real blue windex rather that soapy water. I've found it finds leaks soapy water misses. The cheap brands don't work as good.
 
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504
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PostPosted: Wed Mar 25, 2020 7:04 pm    Post subject: Re: Pressure testing fuel oil tanks. Reply to specific post Reply with quote

If it is going to leak you would expect it to be a rust through. Use a small ball peen hammer and tap the bottom, if it dents it is thin,tap and listen to the noise, a thud it is thin. If you do use air fill it with water first then use a hand pump,if it would blow up, you will be as safe as you can be with water in it.(Hydro test)
 
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