Nitrogen padding of drums / totes before shipping for avoiding liquid product oxidation

[plantprowler]

We are exploring the option of Nitrogen padding of drums (200 L) / totes (1000 L) before shipping for avoiding liquid product oxidation. Any guidelines on how this is done and what typical over-pressure to use etc?

Any systems that are sold to do this?

When I researched I find a lot of literature and products for blanketing large stationary tanks. But I don't see any products sold for padding / blanketing of drums and totes pre-shipment.

Any thought / comments on how to go about putting such a system in place? Currently the drums / totes are being filled manually through hoses. The product is safe and with a relatively high flash point and exposure is not an issue.

The N2 padding would be for product degradation prevention and not for safety issues.

 

[bimr]

This is a common practice for food products, like potato chips. A vacuum pump is used to extract the air and then the package is filled with nitrogen. Pringles has an 18 month shelf life because of this.

 

[EdStainless]

With liquid product it is necessary to deaireate the liquid also.
The only time that i saw this done they filled the totes using vacuum.
This effectively degassed the fluid as they filled the tote. But the tote must be able to withstand the vacuum in order to do it this way.
They kept a nitrogen blanket on the supply tank, and then backfilled the tote with nitrogen when they had reached the desired weight of product. The positive pressure was very low (less than 1psi) and they had a small expansion tank with an internal bladder to allow for expansion and contraction.

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P.E. Metallurgy, Plymouth Tube