I would like to ask about the installation requirements for cut-off valves
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Are cut-off valves necessary for storage tanks holding Class A and Class B materials, or are they required when the tank area is classified as a major hazard of a certain level?
In tank areas that are classified as major hazard sources, where liquefied gases or highly toxic substances are present, emergency shut-off valves must be installed.
These days, emergency shut-off valves are often installed for the storage and transportation of chemicals in oil depots
Is it a shut-off valve or an emergency shut-off valve? Emergency shut-off valves are generally located in two places: at the liquid inlet and outlet at the base of the storage tank, and in the pipe gallery 10 meters away from the loading/unloading platform. The base of storage tanks is primarily linked to high liquid levels; the relevant design requirements can be found in SH/T3007-2014. Loading and unloading equipment is designed to prevent fires, and the related requirements are specified in GB50160. As for the specific selection criteria for emergency shut-off valves, such as leakage levels, fire protection requirements, and shutdown time, refer to SH/T3005 as well as the \"Specifications for the Selection of Emergency Shut-Off Valves for Sinopec’s Liquefied Hydrocarbon Storage Tanks.\" However, at present, emergency shut-off valves are overused in China, resulting in their use in situations where they are clearly unnecessary – in cases where ordinary shut-off valves would suffice. It is recommended that the original poster be cautious when making a choice – safety standards should not be lowered, but there is no need to raise requirements or increase costs unnecessarily.
Emergency shut-off valves for storage tanks are generally installed at the outlet and inlet at the base of the tank
Our tank area is not large; each tank has a capacity of 100 m3. There are tanks of Class A-B, Class B-A, and Class C, and these meet the criteria for a major hazard source of level 4. Does it suffice to install emergency shut-off valves at the bases of the Class A-B and Class B-A tanks, while no such valves are needed for the other tanks?
Clause 6.13 of AQ3053-2015 specifies clear requirements
Hello, may I ask in which standard it is mentioned?
It hasn’t been finalized yet; at the end of last year, there were rumors that emergency shut-off valves would be installed in both Class A and Class B tank areas