Contacts Design Certifications Production Applications Company Brochure Italian English French German Spanish 3S srl designs and manufactures heat exchange coils with spiral finned tubes and finned pack coils in the P60-16 , P40-16 , P30-16 and P30-12 geometries . Company 3S Saldature Speciali Segrate srl was established in 1970. Since its origins, the Company has been dedicated to the design and production of components and equipment that are widely used in the industrial heat exchange sector. EUROVENT - the only company in Italy We are the only Italian company to have achieved and maintained the "CERTIFY ALL" certification on the battery selection program, in accordance with the OM-9-2002 specifications. ISO 9001 / UNI EN ISO 9001: 2008 We have been producing for several years maintaining high quality standards in accordance with ISO 9001 / UNI EN ISO 9001: 2008. Via Bari, 8 20060 Trezzano Rosa (MI) - Italy ··· Tel. +39.02.90981369 - Fax +39.02.90981374 - info@3stc.it ··· PI - CF 02979530157