Hi guys. I've encounter this senten

[Jack Nicholson]

Hi guys. I've encounter this sentence of shut down of a distillation column. What does it mean "block in"?
"If the system has to be emptied, block in the above mentioned control valves."

 

[JohnGP]

"Block in" means to isolate the system by closing the specified valves.

 

[LittleInch]

I agree. "Shut in" or "isolate" would be better IMHO,

It might be defined as a specific action somewhere in the rest of the procedure. Can you do a text search?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Jack Nicholson]

All control valves have been closed, then the authur said:"block in all mentioned control valves"

 

[zdas04]

Control valves are never assumed to be bubble tight isolation. Where isolation is required to be bubble tight the designer installs a block valve in addition to the control valve. I wold take "block in" to mean shut actual block valves in addition to disabling control valves in the closed position.

[bold]David Simpson, PE[/bold]
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist

 

[bimr]

Agree that "Block in" means to isolate the system by closing the specified valves.

Since this may involve a safety issue, you should put the question to the original designer.

 

[JohnGP]

I agree that the intent of the statement should be clarified, but it should be apparent from the P&ID of the system how isolation can be achieved.