Lower pressure leads to lower boiling temperature.
For example, a component that boils at 180°C at one pressure might boil considerably lower at reduced pressure.
That can be very beneficial when:
Components are thermally sensitive
Polymerization/decomposition is possible
Heavy hydrocarbons are ...

Bubble-cap trays are often better when operating flexibility and low-load performance are more important than pressure drop, capacity, cost and mechanical simplicity.
A bubble-cap tray maintains liquid on the tray and forces vapor through the risers/caps. Unlike a sieve tray, there are no simple ...

If you are dealing with a continuous feed where the composition (and thus the MW) is fluctuating, operators and control systems must closely monitor several variables:
Anti-Surge Control System Tuning: Older or simpler anti-surge controllers rely on a fixed surge line programmed for a specific gas ...

Spade control should not depend on the PSSR team discovering, line by line, that a spade has been left in the wrong position. That is a weak control philosophy.
The better approach is to treat temporary spading/blinding as a controlled configuration of the process plant, with independent controls at ...

Maintenance engineers:
What sort of Belzona repair can be applied on piping pinhole having cooling water service?
What are the major considerations?
Applied in all cases? What are the limitations?

A reactor runaway is first controlled by the Basic Process Control System through cooling and feed control. If temperature continues to rise, alarms prompt operator intervention. Should the operator fail or the reaction accelerate beyond control, the Safety Instrumented System initiates an automatic ...

ALOHA still stands out.

Sys1
Just to provide you the reply with the second part of your question, no not all PSVs are considered as safety critical - not those on flammable /hazardous /toxic services where barrier breakdown would lead to a major accident hazard.

We can just give it as much importance as any governing body has given. I have not seen any 1st pillar of process safety at any hydrocarbon facility first not talking about process safety information. We do not move further if we have issues here. Even today, most of the audit bodies come in and try ...

We have a specialized module designed within our badic change management system which enables us to perform risk assessment, lock the tags as well and when any necessary maintenance is planned on those lock tags, Operations gets to know through their system that this job requires a risk assessment ...