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S4i – Stainless for Industry
is a complete service concept comprising five mutually complementary companies specialised in making deliveries of welded sheet metal structures, machinery and equipment made of stainless and acid-resistant steel to the pulp & paper, process, energy and environmental technology industries. S4i is an umbrella organisation containing extensive and diverse competence and machinery. The S4i production units are located in Turku, Naantali and Vantaa.
S4i employs more than 300 professionals. Together we can supply increasingly demanding and extensive turnkey systems and components, tailored to customers’ needs, providing everything from design to final installation. 
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Download S4i-brochure