SEAMLESS COMMERCIAL TUBES AND TUBES FOR WATER AND GAS These are round SEAMLESS tubes, either hot rolled or cold drawn with following heat treatment. They are supplied with plain ends, without bevels, and they can all be supplied in fixlength (tolerance – 0 / + 5 mm) and with mill test certificates 3.1 according to EN 10204. Random lengths are about 6 m. Commercial tubes for general applications and for heat exchangers, tubes can be welded / threaded for the construction of water or gas pipelines.

NORMS COMMERCIAL TUBES FOR HEAT EXCHANGERS AND FOR GENERAL APPLICATIONS (only for what concerns the steels properties ) ASTM A 106 GAS TUBES SUITABLE FOR WELDING AND THREADING EN 10255 CHEMICAL ANAYLIS AND MECHANICAL PROPERTIES Mn Mechanical properties Commercial tubes (steel according to ASTM A 106) Yield strength Tensile strength Longitudinal min. Rm elongation min. ReH min. % max. min. max. max. max. max. max. max. max. max. max. (N/mm²=Mpa) (N/mm²=Mpa) Chemical elements (% on mass) Steel grade ¹ Elongation refers to a standard 50 mm long sample.