The reliability of an automatic fire sprinkler is crucial to prevent malfunction during an emergency. To control corrosion and other hazards, the water inside the system must be monitored. The IMO has issued revised guidelines (contained in circular MSC.1/CIRC.1516) for in-service testing of automatic sprinkler and automatic mist systems.
These guidelines advise shipowners, operators, and system manufacturers to actively monitor and assess the effectiveness of these systems on a planned periodical basis, with water quality testing performed quarterly and results recorded.
Corrosion can cause catastrophic problems with these systems, potentially leading to system failure and leakage (pinhole size leaks). The test kit includes testing for pH, conductivity, and microbiological levels (total count of bacteria & sulfate-producing bacteria). Saltwater ingress can occur when the system has been used (freshwater) and is then bypassed directly using seawater. If this occurs, the system is flushed through with freshwater. A chloride test is provided to ensure seawater is not present, which can cause corrosion problems.
Any part of the system may be subjected to freezing temperatures in service. Anti-freeze (mono-ethylene & mono-propylene glycol) is used as standard to protect these systems from freezing. A glycol refractometer is supplied to ensure the systems are being maintained at the correct freeze point or percentage product.
Marine Automatic Fire Sprinkler System
pH Stick Meter
BT2 Dip Slides (10)
SRB Dip Slides (10)
BC1 Potassium Chromate Indicator (65 ml)
BC2 Chloride HR Titrant (65 ml)
250 ml Wide Neck HD Bottle