The gas pressure test is performed on the inner cylinder of the storage tank, and the test pressure is 1.2 times the working pressure. The specific steps are carried out in accordance with the relevant provisions of the "Regulations".
Carry out air pressure test on the inner cylinder, check its strength on the one hand, check the sealing performance of the inner cylinder on the other hand, and determine whether there is leakage in the inner cylinder through the display of the pressure gauge. The above inspection plan is formulated for the case that it is not necessary to open the cover without opening the cover or after passing the review of the original data, the external inspection and the vacuum test. Because the design life of this kind of container is generally 15 years, the storage medium basically does not corrode the inner cylinder, and there is a higher requirement of NDT as a guarantee. Under normal use conditions, the equipment is generally not used for 5-10 years. Larger problems arise. However, if the equipment is found to have major problems affecting the normal operation of the equipment during operation, the cover must be opened, or if the re-evacuation fails to meet the requirements, it indicates that there is a leak, and if the cover needs to be opened for maintenance, the cover must be opened for maintenance.
