Mar 06, 2013– Dallas, USA (Techreleased) – These updated IMO regulations require that a secondary means of allowing full flow of vapour, air or inert gas in the cargo tank is provided in the event that the primary pressure relief valve arrangement fails. This ensures that the tank is operated within its design limits and is not mechanically damaged by over or under pressure.
Alternatively, and more cost effectively, especially where retrofit is required, the regulation allows that cargo hold pressure sensors may be fitted to each tank and their outputs routed to a monitoring system in the cargo control room. This will provide an alarm in the event of a cargo over or under pressure condition.
Many of the major oil companies are now mandating that the vessels they charter conform strictly to the new IMO legislation, forcing ship owners and operators to upgrade their ships’ tank safety systems.
The complete PSM system comprises ict 1000 pressure transmitters mounted in the tank roof or vent line that are fully protected against positive or negative overloads and submersion. They are type approved by many marine classification societies and may also be used in hazardous areas when installed with appropriate PSM RFM safety barriers. They are connected to a PSM MTU display unit located in the Cargo Control Room that provides a monitoring station showing an indication of normal or alarm status for each tank, as well as the actual pressure.