Pressure relief valve - norm 3

[Alma X]

Hello,
As part of the development of a PID, I am looking to install pressure relief valves (PRV).
My system operates under pressure (8bar).
Do I have to provide PRV on each line and each equipment of the installation?
Am I obligated,in accordance with norms, to set up PRVs on each equipment under pressure?
The problem that my reactor produces the carbon dust (CH4= H2 + C (s)).
Should I put on an PRV??? I'm afraid that releasing dust will make the situation worse.
Thank you in advance!

 

[jari001]

What is the design pressure for the system? Have you identified situations where equipment failure or human error could cause the process pressure to rise above the design pressure?

 

[Alma X]

Thank you jari001 for your response.
My maximum operating pressure is 8 bar, according to NORSOK standard, my maximun operating pressure is about 11,5 bar. When the discharge is blocked; or in fire case, pressure will rise above DP.

 

[Latexman]

A pressure vessel built to a Code that has jurisdiction of the pressure vessel's location usually requires at least one relief device. A heat exchanger type pressure vessel usually needs two, one for tube side and one for shell side.

A line usually does not require a relief device. Pressure containment of a line is usually managed administratively and by a process control system. However, a line that can be "blocked in" at both ends and can exceed it's "design pressure" may need a relief device.

The IP locator says you are in France. I do not know the Codes and Standards there, but I do know they exist. You need to seek them out and learn them. They are somewhat similar, and maybe identical, to the ASME Code, API 520 Part I and Part II, API 521, API 2000, NFPA 30, and a bunch of other standards that I follow in the U.S.

About your Reactor. ASME Code requires a pressure vessel to have a relief device, except if the Engineer has designed the reactor to contain every credible scenario. And in this case, the Engineer should prove/document to the ASME/National Board the system design when designing the vessel (before it is purchased). It is an onerous process to do according to the Code. When a fire scenario is credible, which seems to be the case for our reactor, this is difficult, maybe impossible. The Engineer must follow his company's risk management policies; they are not on their own. And, you are not alone shouldering the full responsibility. At the end the day, if things go wrong, the whole company is. Talk to your Safety, Industrial Hygiene, Operations, and Engineering Managers for guidance. It sounds like the relief on your reactor must be routed to a safe place and handled safely and environmentally friendly. Maybe to a flare? Maybe not, I know nothing of your process.

Good Luck,
Latexman

 

[Alma X]

Thank you very much Latexman for your precious help. I will investigate more