This standard specifies the type, basic parameters, main dimensions and technical requirements of glass-lined closed mixing vessels. This standard is applicable to vessels with a volume of 2500L to 20000L, a design pressure within the vessel less than or equal to 1.0 MPa, a design pressure within the jacket less than or equal to 0.6 MPa, and a medium temperature within the vessel and jacket higher than -20°C to 200°C. Glass lined closed mixing vessel.