This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, storage and transportation requirements for steel mechanical mixing vessels (hereinafter referred to as mixing vessels). This standard applies to mixing vessels that meet the requirements of GB 150, JB/T 4735, and meet the requirements of HG/T 3109. The process operation process is a steel mechanical stirring vessel that uses stirring liquid as the main medium (it can also be accompanied by gas and solid phase media) to carry out various physical and chemical processes. Typical combinations of containers and mixing devices include: top entry, inclined entry, bottom entry, side entry, etc. This standard does not apply to the following stirring vessels: stirring vessels heated by direct flames; stirring vessels subject to radiation; stirring vessels for fatigue analysis; glass-lined stirring vessels; and stirring vessels that are frequently moved.