Selection of lead seals and locks for safety valves
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For the valves located before and after the safety valve, previous standards required that CSC and CSO be indicated; however, I recently saw a flow diagram in which LC and LO are used as the standard designations. How should one choose between these two? What are the differences?
The safety valve must be unlocked or sealed with lead on both the front and back; otherwise what is the purpose of the safety valve?
It’s just a difference in wording; I don’t think it’s necessary to focus on specific words
Sealing with lead is best! It was accidentally operated on, the seal was broken, and it can be seen at a glance ； Using a lock can prevent accidental operations by others, but in an emergency when it’s necessary to operate the valve, unlocking takes time; and if the key is lost, it could lead to serious problems.
Sealing with lead is best! It was accidentally operated on, the seal was broken, and it can be seen at a glance ； Using a lock can prevent accidental operations by others, but in an emergency when it’s necessary to operate the valve, unlocking takes time; and if the key is lost, it could lead to serious problems.
Considering the convenience and reliability of practical operation, lead seals are generally used in engineering
CSC and CSO are seals, similar to the weight mechanism on electricity and water meters at home; LC and LO are locks that require a key to operate. LC and LO have stricter requirements than CSC and CSO
Seals can be broken relatively easily, while locks are more secure
In simple terms, it is an emergency action – one that cannot be carried out without the issuance of relevant documents under normal conditions