Continuous monitoring is no longer an option; it is essential for the protection against special hazards in critical infrastructure. Clean agents are designed to operate in limited spaces where there is a need for speed of suppression given the asset risk and where the space is occupied by people. They deliver the infrastructural resilience our advanced society requires. The assumptions in the installation, commissioning and maintenance of gaseous extinguishing systems is that they are highly pressurised but risk leaking and discharging. ISO 14520 specifically guides our industry as to these risks; In 220.127.116.11 The storage container contents shall be checked at least every six months as follows. : a) Liquefied gases: for halocarbon agents, if a container shows a loss of agent in quantity of more than 5 % or a loss of pressure (adjusted for temperature) of more than 10 %, it shall be refilled or replaced. b) Non-liquefied gases: for inert gas agents, pressure is an indication of agent quantity. If a container shows a loss of agent quantity or a loss of pressure (adjusted for temperature) of more than 5 %, it shall be refilled or replaced. Therefore, at a standards level it is known that gaseous systems can become ineffective through accidental discharge and leakage and thus they do not serve to protect the critical infrastructure in such a case. To know the contents, you need to monitor it, and checking it every 6 months is not monitoring it.
Should we not just constantly monitor all of them and be in full compliance to the regulations and the risks that are so clearly described in our own core standards? If it is known and accepted that these are dynamic systems that are prone to leaking, but they are expected to deliver resilience and protection, then why are they left unattended for 6 months of the year? We would not do the same to an alarm system without monitoring it 24/7, so why are we not monitoring gaseous extinguishing systems? Let us apply 21st century science to a 100 year old issue and be done with it. A dynamic system needs monitoring. The neglect of continuous monitoring of the fundamental protection provided by the gaseous extinguishing systems is to the peril of the lives of occupants of the premises and at the risk of crippling financial loss to the facility comprising the critical infrastructure. To ensure that dynamic gaseous systems are protecting critical infrastructure in a safe and diligent manner, 6 monthly monitoring and maintenance is no longer enough. There is a call for continuous monitoring and this is something that cannot wait any more.