Work On Tanks When Full? - Sandblasting - Contractor Talk

Work On Tanks When Full?

 
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Old 09-01-2010, 06:14 AM   #1
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Work On Tanks When Full?


Doing a bid for a small company, but I am sceptical about blasting on a fuel tank when there full.

tanks have #2 and diesel in them (no propane or gas)

for you guys that do big tanks, Do you ground off the tanks before blasting them? They should be grounded any how, But wondering if a second ground for back up is needed?

any concerns about HOT Work on tanks?

I've done many small mobile truck tankers with no problems, Just need some ammo for the meeting in a few days.
I don't want to look unprofesional.
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Work on Tanks when full?-oil-tanks.jpg   Work on Tanks when full?-oil-003.jpg  
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Old 09-01-2010, 06:56 AM   #2
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Re: Work On Tanks When Full?


I love some of the jobs you get. I don't see how them being full would hurt anything especially with deisel. However those could be famous last words before a nuclear explosion takes place. Would the constant vibration of the tank from the blasting do anything bad???

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Old 09-01-2010, 10:03 AM   #3
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Re: Work On Tanks When Full?


Blast them full. Done many of them. From 5,000gal to 5,000,000gal. No.2 fuel oil, your not going to explode them. And yes, they should be grounded to earth already, but it's always safe to verify that they are.
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Old 09-01-2010, 10:16 AM   #4
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Re: Work On Tanks When Full?


There is definitely concerns with hot work on tanks. The work can be done, but all risks have to be considered and mitigated. Here's a video from the CSB showing the dangers of hot work.

http://www.csb.gov/videoroom/detail.aspx?VID=44


Do the research, find the right procedure and away you go.
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Old 09-01-2010, 10:32 AM   #5
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Re: Work On Tanks When Full?


Here's a link to the website: http://www.csb.gov/default.aspx

If you search for the following bulletin, they've got some good info. The file was too big too attach. ( I've attached the summary only )

2010 Feb - CSB Hot Work Safety Bulletin - 7 lessons.pdf
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File Type: doc Hot Work Aug 2010.doc (29.0 KB, 392 views)
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Old 09-01-2010, 10:38 AM   #6
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Re: Work On Tanks When Full?


"They said it was a...."

"So we decided to use an Acetylene...."

"Burned over 90% of my body...."



Mystery how this occurred!


Work smart. Work SAFE!
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Old 09-01-2010, 03:10 PM   #7
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Re: Work On Tanks When Full?


We blast tanks all summer long. Gas, Diesel, Fertilizer, Anhydrous, LP, Propane what ever. We always and I mean always plastic and tape shut the relief valves and vents on the top of the tank. You have to unseal them as soon as your done blasting. We have never had a problem and have done hundreds of tanks.
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Old 09-01-2010, 07:41 PM   #8
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Re: Work On Tanks When Full?


Just for notes:
we are just doing tops and skerting around
nothing under or inside.

I forgot to add this earier.

Thanks for all the replies, I grately appreciate it guys.

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Old 09-07-2010, 07:25 PM   #9
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Re: Work On Tanks When Full?


Still working on priceing for spent grit

so far we found a local waste remover that will drop of a slide dump that will hold 12,000 lbs for $65
pick up and deliver to land fill (if not Has Mat) 350.
Liner 45.
and dump fees at 65 per ton.

TCLP fees are 260.
if its haz, they have to hall it to Mass? (for extra)

Owner of the tanks is paying for all of this, just thought I'd share.
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Old 09-19-2010, 09:52 AM   #10
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Re: Work On Tanks When Full?


I also do alot of LP, anhydrous, and diesel tanks and have never had a problem. The biggest concearn they have is that I double wrap aluminum tape around shut off valves to protect the valve seal. I lightly go around them when blasting. No issues or problems. Most of the items I blast are on chasis, with the tires still on so I use that as my ground. Havent blown up to date.
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Old 09-19-2010, 10:18 PM   #11
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Re: Work On Tanks When Full?


I see a lot of sparking when blasting either from static or just the glass hitting something. I'm assuming if a vent is open somewhere it could ignite. Is there a way to control the static seems to be worse now that I'm using a plastic style Schmidt nozzle instead of the short steel one.
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Old 09-20-2010, 02:08 AM   #12
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Re: Work On Tanks When Full?


Quote:
Originally Posted by kell490 View Post
I see a lot of sparking when blasting either from static or just the glass hitting something. I'm assuming if a vent is open somewhere it could ignite. Is there a way to control the static seems to be worse now that I'm using a plastic style Schmidt nozzle instead of the short steel one.
I can't say for blasting, but I can say that dust collection systems that use plastic pipe for the conduits creates static charges that have to be grounded to prevent ignition of wood dust in the air stream and containment systems. As air passes through plastic, a static charge is created, it is a fact of life when using plastic components. The only way around the static charge is to ground it out away from ignition points, in the case of dust collection, a bare copper wire is run through the ducting and grounded at regular intervals between the collection point and the storage point. Can't say how such a grounding implementation could be arranged with a blasting set up.

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