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AS 1692

AS 1692

(OP)
Hi

I need to replace some existing Sodium Cyanide Tanks. The tanks were previously designed to AS1692 - however when reading that code it states it is only applicable for liquids whose density is not greater than 1000kg/m3 and the max volume for a horizontal tank is 150m3.

Now the density of Sodium Cyanide in solution is 1190kg/m3 and one of the existing tanks is 165m3.

So there are 2 non compliances with this code that I can see.

Can the code still be used? Is there another applicable code?

ANy help is appricated.

RE: AS 1692

fastphantom,

It's been a long time since I had to do anything with AS1692, but note in the latest edition that it allows consideration of liquids with density higher than 1000kg/m3 (in Cl 2.2.1). The standard still seems to be empirically based, but allows adjustment now for density. There doesn't seem to be any let off for the 150m3 limit though.

It may be necessary to design in accordance with AS1210 - not sure how conservative that will make the tanks though. AS1210 is referenced for support design anyway.

Cheers,
John

RE: AS 1692

(OP)
JOhn

Thanks for taking the time to read thru As1692. I agree with your comments and have designed the 165m3 tank to AS1210.
It ends up with an 8mm wall thickness which is comparable with the AS1692 selection for the Class4 150m3 tank.
So I feel comfortable with that now.

Once again thanks for your post.

Regards
Tony

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