This standard specifies the type, basic parameters and model representation method of vertical cylindrical steel mechanical mixing vessels. This standard is applicable to applications with a volume of 0.040m3~200m, a diameter of 400mm~5800mm, a design pressure (gauge pressure) of -0.1MPa~15MPa, a medium temperature of -40℃~350℃, a dynamic viscosity not greater than 500Pa·s, and a density not greater than 2t/ m3 vertical cylindrical steel mechanical stirring vessel for liquid media. This standard does not apply to stirred vessels without lids and heated by direct flames.