The root valve of the safety valve is very high; it’s not easy to get close to it even with a ladder. Is it still necessary to apply a lead seal?
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The valve at the base of the safety valve is very high; it’s not easy to get up to it even with a ladder. Who would go to the trouble of climbing up there just to adjust it? Is it still necessary to keep the lead seals on at all times? Is it still necessary to apply a seal?
It’s not a matter of whether it’s high or not, or whether it can be reached; it must be sealed with lead seals.
The purpose of applying a lead seal is to ensure that the safety valve cannot be operated or closed arbitrarily, thereby guaranteeing the safe operation of the system. Even if the root valve is very high and difficult to access, applying a lead seal remains a necessary measure. Avoid having unapproved or unqualified personnel perform operations, thereby reducing the likelihood of accidents. Therefore, for the security of the system, applying a seal is necessary. .
It’s difficult to get close to the root valve of a safety valve, even with a ladder – so how can it be removed for annual inspection? It’s impossible for a report to be issued without detection. There are serious issues with the design. Installation and selection of safety valves HG/T 20570.2—95 15.0.1 Safety valves need to be regularly inspected and maintained; therefore, they should be installed in locations that are easy to access for such purposes. Safety valves installed on vertical vessels can be mounted at the edge of the platform if their inlet diameter is less than or equal to DN80; those with an inlet diameter of greater than or equal to DN100 must be mounted on the platform itself.
Seals are required, regardless of height
Isn’t it good to have unified standards? In some places, the safety valves have lead seals, while in others they don’t ； Over time, it becomes chaotic and difficult to manage