Title

INNOVATIVE DESIGNS FOR POLYPROPYLENE TANK

PROJETOS INOVADORES PARA TANQUES DE POLIPROPILENO

Authorship

Leroyer, Jacques; Garness, Robert; Pugh, William

Leroyer, Jacques

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Garness, Robert

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Pugh, William

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DOI

10.5151/2594-5297-0014

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Abstract

Polypropylene process equipment has steadily gained acceptance for use in the carbon and stainless steel industries since the first pickling tanks were introduced in 1970’s by Allegheny Plastics, Inc. (now owned by Siemens). Siemens SIROLL CIS Allegheny Tanks are being used for surface treatment equipment in extremely corrosive environments that include most acids, alkalis, and plating solutions at temperatures up to 100° C. The engineering, design, and fabrication of this equipment has progressed to the stage that polypropylene is widely accepted for many process line applications. Trustworthy designs can now be produced using the engineering properties of this material. Siemens’ experience with the design of steel mill duty polypropylene equipment has resulted in long lived plastic tanks in the most rigorous service. We have developed design solutions to answer the questions of material choice, expansion/contraction, elevated temperatures, strip control, and protection. Innovative designs have been developed through the collaboration of steel industry personnel with plastic designers. This cooperation has revolutionized process lines by providing cleaner, lighter, less costly equipment that is easily repaired and requires minimal maintenance. Polypropylene equipment is now the latest technology for replacing tanks on existing deep catenary type and on new shallow turbulent type pickling lines. Siemens SIROLL CIS Allegheny Tanks group are the pioneers and designers of polypropylene tanks for these applications.

Os tanques da Siemens SIROLL CIS Allegheny Tanks estão sendo utilizados em equipamentos de tratamento superficial em ambientes extremamente corrosivos, incluindo a maioria das soluções ácidas, alcalinas e de chapeamento operando a temperaturas de até 100°C. A engenharia, projeto e fabricação destes equipamentos se desenvolveram até o ponto em que o polipropileno é amplamente aceito para muitas aplicações em linhas de processo. Projetos confiáveis podem ser agora implementados usando as propriedades de engenharia deste material. A experiência da Siemens com o projeto de equipamentos de polipropileno para aplicações siderúrgicas tem resultado em tanques plásticos de grande durabilidade sob as mais rigorosas condições operacionais.

Keywords

Polypropylene; Pickling tanks; Corrosion resistance; Plastic tanks.

Tanque para linha de decapagem; Polipropileno