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Re: Ice Force on Steel Water Storage Tanks

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The traditional method for freezing water is to install a steam loop inside
the tank to maintain the water above freezing.  A unique alternative could
be;

Line the inside of the tank with some closed cell foam.  Using closed cell
foam would allow the ice to expand into the foam with minimal force and
using closed cell, the water should not saturate the foam and freeze the
foam solid.

I don't know how durable this approach would be especially if the water
surface froze, the tank water level lowered and the ice is wedged above the
water surface (ripping the foam?)

As far as antifreeze, I hope the water isn't intended for potable use.  If
the antifreeze leaked, trouble.

Paul Blomberg
Phoenix, AZ
 ----------
From: cmd(--nospam--at)ibm.net
To: seaint(--nospam--at)seaint.org
Subject: Re: Ice Force on Steel Water Storage Tanks
Date: Wednesday, March 10, 1999 10:00AM

Bruce;

That's an interesting idea.  Maybe an O-ring filled with anti-freeze.

cmd


 -----Original Message-----
From: Parkerres(--nospam--at)aol.com <Parkerres(--nospam--at)aol.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Wednesday, March 10, 1999 9:19 AM
Subject: Re: Ice Force on Steel Water Storage Tanks


>In a message dated 3/9/99 3:24:21 PM Pacific Standard Time,
>PMeyer(--nospam--at)HASimons.com writes:
>
><< Basically, you need to be able to resist 100% of the expansion force of
the
> ice.  This means you have to break the ice in compression.  Compressive
> strength of ice is about 375 kPa (54 psi) just at freezing temp, and up to
> 1500 kPa (217 psi) at very cold temperatures.   >>
>
>
>I have no tank experience but will offer the following.  I assume that you
>cannot pour the water in the tank so that is a gap between the water and
the
>wall!  However, could you line the tank with a 2" - 3" (or whatever it
needs
>to be) compressible material that is strong enough to resist the water
>pressure, but flexible enough to compress under the ice pressure?  Just a
>thought.
>
>Bruce Resnick, SE
>Parker Resnick Str. Eng.
>