Regular Testing Method
Normally, deluge systems are annually tested with water, very often brackish water or even sea water. Because of this, these routine wet deluge tests cause many unforeseen complications, as well as risks to personnel during the complete operation.
Seawater spray over an entire platform is a hazard for the expensive processing equipment and many platform activities will be disrupted while testing, wet testing causes:
- ● Growth of MIC (Microbiologically Influenced Corrosion;
- ● Corrosion and salt crystallization in flow pipes and nozzles;
- ● Blockages of piping and spray heads;
- ● Excessive firewater discharge will overflow the sump / drain tanks;
- ● Freezing of firewater can be quite dangerous to operators in Arctic conditions;
- ● Risk of unplanned business loss and plant shutdown due to water ingress;
- ● Exacerbation of any existing corrosion within carbon steel systems.
Blockages inside the spray nozzle by a piece of mussel's shell, leading to a half spray cone (both with vapor and water) instead of a complete spray cone.
Blockages due to corrosion scaling, leading to a fully blocked nozzle, where no vapor was exiting. Each additional salt water wet deluge test will make the problem of corrosion scaling worse. It is a counterproductive process and the safety system becomes less safe by testing it with water.
Testing with water incurs a high volume salt water spray over all electrical equipment, junction boxes and SCADA systems. In the UK, it is required to install water ingress protection to all junction boxes, potentially leading to weeks of additional preparation time and also costs.
SIRON Patented Dry Deluge Test
Testing without (sea) water prevents corrosion.
SIRON Offshore Services offers a Dry Deluge Test. Corrosion in piping and on installations infrastructure is reduced because of the use of vapor instead of corrosive seawater.