The Patent Tube It is a carbon steel tube with longitudinal weld and a round section. It is produced from low-carbon steel coils SAE/ABNT 1008/1012. Hot rolled, cold rolled, or galvanized and electric resistance welded (ERW), its manufacturing tolerance is based on national standards.
For the diameter, the values in inches refer to the nominal value (internal diameter), and the values in millimeters are related to the external measurement (external diameter).
