Systems designed to relieve overpressure. These include: Relief Valves, Rupture or bursting Disks, weak seams on tanks, block valves which isolate the source when a dangerous pressure is detected or vents teh vulnerable system
Safety 2 Safety S2S - A Gateway for Plant and Process Safety, The European Web Portal for Process Safety, USA 2003. http://www.safety-s2s.eu/modules.php?name=s2s_wp4& idpart=4&op=v&letter=all, (IndS - Amer) {458}