The purpose of this standard is to set the dimensions in millimeters and the technical delivery conditions. It concerns round tubes with smooth ends, welded longitudinally, in non-alloy steel, made from flat products? hot rolled. These tubes are commonly used in various mechanical and construction industries, for example: furniture, cycles, automobiles, locksmithing, etc.
NT 26.01-1983 history
1984NT 26.01-1983 The connected round steel tubes are formed in frozen conditions and rolled from high temperatures.