Tri-Mer Co-polymer Tanks Were Recently Chosen
for a Major Stainless Steel Processing Line in
Pohang, South Korea
The line provides continuous annealing
and pickling of stainless coils, “24/7.” Tri-Mer co-polymer tanks were originally designed for use in hard-coat and hot anodizing operations,
where continuous extreme temperatures (32ºF, up to 85ºF and above) are standard. Tri-Mer co-polymer tanks are fabricated using a proprietary protocol that assures seamless structural
integrity and full strength at all bend sites. The Pohang co-polymer tanks were engineered by Tri-Mer
to unusually close (±1.5”) tolerances, to fit an existing configuration with strict space limitations.
They replace four steel/ rubber brick-lined tanks, which will be demolished as part of the project. Each Tri-Mer co-polymer tank is manufactured from 1.5” pre-stressed polypropylene sheet, and is
60’ x 6’ x 3’. Tank #1 operates 30% sulfuric acid at 212ºF. Tank #2 is a mixed acid (30% nitric,
15% hydrofluoric) tank operating at 176ºF. The remaining tanks are a uniquely engineered
configuration of “two tanks in one” (4 total modules) precisely sloped, with tight center-line
requirements. Tank covers, also provided by Tri-Mer, are 1” (European standard gray)
polypropylene. Tri-Mer is a leader in advanced co-polymer tank technology and specializes in tanks with tight
design tolerances and custom shapes. Proprietary protocols developed by Tri-Mer allow co-polymer
tanks to be manufactured in larger sizes than is otherwise practical, because thermal expansion is
less of a factor. As a result, fewer co-polymer tanks can often fulfill a given process requirement,
at lower project cost. The Pohang facility is owned by Posco, Korea’s leading steel company, with production capacity
of 2800 tons. Do-Max Engineering, Seoul, South Korea, provided project management. Posco was selected by Forbes Magazine as one of Asia’s “Fabulous 50” companies. It is the only
steel company in Asia to be listed. Companies selected had revenues or market value of at least
$5 billion, and the best aggregate scores for long-term profitability, sales and earnings growth.
Have a potential application? Contact Tri-Mer
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