HOME ABOUT US STAINLESS STEEL TUBES STEEL CONSTRUCTIONS CONTACTS ZM TUBES For high precision applications WELDED TUBES Process and characteristics Since ZM TUBES is equipped with its own coil slitting line, it is fully flexible and able to modify the final diameter at the very last moment. Strips are first formed along the width and then TIG (tungsten inert gas) or laser welded at the edges along the length. Welding is carried out without any filling material. Strong corrosion resistance, precise forming, and excellent roughness of surface even along the welding area are the keys to success that make ZM TUBES a world-class supplier of heat exchangers, evaporators, condensers and feedwater heaters. We deliver both straight and U-bent tubes with a length of up to 30 meters. Applications Conventional power stations Nuclear power stations Chemical and petrochemical plants Petroleum refineries Pulp & Paper Air treatment Dairy Production Range Diameters 12 -114.3 mm 0.472 - 4.50 inch Thickness 0.50 - 4.00 mm 0.02 - 0.157 inch Length up to 30 m up to 100 ft U-bent tubes WELDED REDRAWN TUBES Process and characteristics Precision is not a matter of chance at Zwahlen & Mayr! Thanks to 40 years of “Swiss made” expertise, using highly skilled staff and continually investing in technological improvements, we have managed to maintain our position at the highest level of redrawn precision technology. Our stainless steel welded tubes are fully manufactured “in house” from mother coil slitting up to standard welded tubes which guarantees constant mechanical parameters, specific surface roughness and tight dimensional tolerances. These tubes then go through a special redrawing process in order to achieve extremely precise characteristics, such as: Narrow dimensional tolerances, Ultra smooth surface with specific roughness outside and inside, Specific mechanical values, Very short tubes (min. 4 mm - 0.157 inch). Outer surface tubes are supplied with different finish such as BA bright annealed or polished. Applications Automotive and aerospace Pharma, food and chemical industry Mechatronics Pneumatic Oil & Gas Instrumentation Several critical industrial purposes Production Range Diameters 5.00 - 105.00 mm 0.196 - 4.13 inch Thickness 0.30 - 3.00 mm 0.01 - 0.118 inch Length from 4 mm from 0.157 inch MATERIAL GRADES AUSTENITIC STEEL CR-NI AUSTENITIC STEEL CR - NI - MO DUPLEX STEEL SUPER AUSTENITIC HIGH NICKEL ALLOY MAIN SPECIFICATIONS SEAMLESS STAINLESS STEEL TUBES Process and characteristics Strong corrosion resistance, perfect tightness, manufacture thanks to the most advanced production technologies are the keys to success that make ZM Tubes a world-class supplier for heat exchangers, evaporators, condensers and heaters. We deliver both straight and U-bent tubes with a length of up to 24 meters. Our stainless steel seamless high precision tubes are customized according to our client’s specification to meet exactly their expectation. We can guarantee a constant quality, specific surface roughness and very tight dimensional tolerances. These tubes go through a special redrawing process in order to achieve extremely precise characteristics as: Narrow dimensional tolerances Ultra smooth surface with specific roughness outside and inside Specific mechanical values Very short tubes (min. 4 mm - 0.157 inch) Applications Chemical and petrochemical plants Power stations Petroleum refineries Food and dairy Automotive and aerospace Pharma and chemical industry Mechatronics Pneumatic Oil & Gas Instrumentation Several critical industrial purposes Main Standards EN 10216-5 ASTM A 213 ASTM A269 ASTM A789 ABOUT US History Investors relations Download STAINLESS STEEL TUBES Welded tubes Welded Redrawn tubes Stainless Steel Grades STEEL CONSTRUCTIONS Bridges Building Special Projects CONTACTS zmtubes@zwahlen.ch info@zwahlen.ch info@cimolai.com © Zwahlen et Mayr S.A. – Capitale Sociale CHF 14’040’000 – C.F. e P.IVA CHE-108.107.754 – REGISTRE DU COMMERCE DU CANTON DE VAUD