A flare system is designed to ✓safely collecting gas waste from the process to keep the equipment within their operating pressure limits, in case of depressurisation or opening of the valves separating the gas and the condensates in the scrubbers sending the gas to the flare to be burned. A flare system is made up of: ✓A set of depressurisation components (safety valves, rupture disks, blow down valves (BDV), automatic pressure control valves). ✓A main collection network and one or two secondary collectors (also called manifolds). ✓A separator drum for the various phases (water, liquid and gaseous hydrocarbons), located at the foot of the flare. ✓A sealing device to prevent any air entry into the system (purge gas, hydraulic guard) ✓A flare stack on top of which a flare tip is placed In a lit flare, a pilot light gas network is installed to permanently supply the pilot lights placed close to the flare tip An ignition system for these flares. A flare System is designed according to API-520, 521 in conjunction with ASPEN HYSYS(DYNAMICS), ASPEN FLARENET. Check out the below photo to see the recommended APIs for Flare System Design ⬇️
Hi experts! Also adding that, Flare system or elevated flare system shall consists with below (not limited to & depends on clients) ~ Velocity seal (You’re mentioned, Based on seal drum KOD design pressure shall varies) ~ Steam injection ~ Propane package for Ignition ~ Flare tip with Ringlemann no. =<1 for smokeless ~ KOD bottom pump & KOD heater ~ Somecases, flare gas recovery package
Hi Ahmed! How are you? I sent you a message.
Good point!
Very helpful!
Useful tips
Insightful!
Process Engineer
4moHi Ahmed, I was dealing in many projects the issue of the air ingress into the flare network after the stop of very hot and cold relief into the flare header due to the purge volume shrinkage in the network.. Engineers should keep in my mind that the flare system is the collector of the ultimate safegaurd of the unit and one should be careful in designing the network also for such instances like hot relief and cold relief with activation of additional purge like nitrogen or fuel gas to compensate the shrinkage caused during that relief scenario to prevent any harm to the network by air pull. This could happen also during the rain condition where the shrinkage of purge could happen. Hope this would be an additional info.