This standard specifies the type, basic parameters, main dimensions and technical requirements of glass-lined paddle mixers for glass-lined mixing vessels. This standard is applicable to glass-lined open mixing vessels and nominal volumes of 50L to 5000L with nominal pressures less than or equal to 1.0 MPa, medium temperatures higher than -20°C and lower than or equal to 200°C, and nominal stirrer speeds of 80 and 125r/min. Glass-lined closed mixing vessels with a capacity of 2500L to 20000L.