Protection system for keeping gases out of tank ventilation pipes on offshore platform, comprises ventilation head chamber connected via pipe to safe region of platform

摘要

A gas and watertight ventilation head chamber (34) is located at least partly within an area (32) at risk from the gases and the ventilation head (28) is in communication with one or more ventilation pipes (22), either directly or indirectly via branch pipes (30). At least one air transport and drainage pipe (36) is connected to the chamber at one end and to a safe region at the other end.