Regular Testing Method
Normally, deluge systems are annually tested with water, very often brackish water or even sea water. Because of this, these wet tests cause 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 organisms;
- ● Corrosion and salt crusting 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;
- ● Aggravation 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 smoke and water) instead of a complete spray cone.
Blockages due to corrosion scaling, leading to a fully blocked nozzle, where no smoke was exiting. Each additional salt water test will make the problem of corrosion scaling worse. It is counterintuitive, yet the safety system becomes less safe by testing it with water.
Testing with water implies a salt water spray over all electrical equipment, junction boxes and SCADA systems. In the UK, it is required to wrap all junction boxes, leading to weeks of additional preparation time.
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 is reduced because of the use of smoke instead of corrosive seawater.