Views: 0 Author: Site Editor Publish Time: 2022-07-07 Origin: Site
1. The designed service life of the pressure vessel is not equal to the actual service life.The design service life is an expected target value, not a guaranteed value, nor can it be regarded as the time limit for the scrapping of the pressure vessel.The actual service life of the pressure vessel shall be determined according to the actual use conditions, inspection results, failure modes, etc., which may be higher than or lower than the design service life.
2. The design service life shall be determined by the design unit according to the expected service life of the container, and shall be indicated in the design drawings.The JC/T720 "Autoclave" standard stipulates: "Under normal use conditions, the design service life of the autoclave is 15 years."
3. TSG21-2016 "Stationary Pressure Vessel Safety Technical Supervision Regulations" mentions the concept of design service life when determining "3.1.11 corrosion allowance".Regulations: "For pressure vessels with uniform corrosion, the corrosion allowance is determined according to the expected service life of the pressure vessel and the corrosion rate of the medium to the material. At the same time, the impact of the medium flow on the erosion and wear of the pressure components should also be considered."
4. Users of pressure vessels should conduct regular inspection and grading of vessels in accordance with the requirements of the current regulations TSG21-2016 "Safety Technical Supervision Regulations for Stationary Pressure Vessels".When the operating conditions of the container change, the corrosion rate should be re-estimated based on the actual measurement data to determine the new service life of the container.