Liquefied petroleum gas storage tank inspection period
The external inspection period of LPG storage tanks: at least once a year; the internal and external inspection periods are divided into: if the safety status level is 1 to 3, at least once every 6 years; if the safety status level is 3 to 4, every 3 years At least once a year; for liquefied petroleum gas storage tanks with one of the following conditions, the internal and external inspection period should be shortened appropriately: the corrosion status of the medium on the pressure vessel data is unknown, the corrosion rate of the medium on the data is greater than 0.25 (mm/year), and The corrosion data recognized by the designer is seriously inaccurate; the welding performance of the material is poor and has been repaired many times during manufacturing; the initial inspection; the use conditions are poor and the management level is low; the service life exceeds 15 years, and is confirmed by technical appraisal It cannot be used according to the normal inspection cycle; the inspector thinks it should be shortened.
