Spaces storing flammable liquids are obvious fire hazard areas which can involve a wide variety of materials of different volatility and heat loads. In accordance with NFPA 30 (Flammable and Combustible Liquids Code), a flammable liquid is defined as a liquid whose flash point does not exceed 100°F/37.8°C (closed cup test), and a combustible liquid is one whose flash point is 100°F/37.8°C and greater.
Storage of flammable and combustible materials should follow the guidelines described in NFPA 30. However, in events involving the leakage of fuels or gases into the storage area, total flooding fire suppression systems approved for the extinguishment of Class B fire hazards can provide effective 3-dimensional protection. Fires in these events may involve pool fires, cascading spill fires, or even spray fires if the fuel is under pressure in the storage container. The containers themselves may be of a combustible or flammable type of material of Class A type.
Various fire suppression systems are available for combating this type of fire event including sprinkler systems, foam-water systems, water-mist systems, dry-chemical systems, and gaseous total flooding systems.
Stat-X, a revolutionary total flooding fire suppression technology has been introduced to the fire industry since 2005. High effective and environmentally friendly, this technology is known as condensed aerosol fire suppression technology, described under standards NFPA 2010 and ISO 15779.
Stat-X has been performance fire tested by the UK MCA and approved for the protection of spaces containing Class A combustible materials and Class B fuelshaving a flash point greater than 104°F/40°C (closed cup test), essentially liquids of the combustible type. These include Class II, IIIA, and IIIB fuels.
Further performance fire testing was performed by UL in accordance with Subject UL2775, certifying that Stat-X is suitable for Class A combustible material fire hazards, Class B flammable materials hazards, and Class C hazards (fires which involve energized electrical equipment where the electrical non-conductivity of the extinguishing media is of importance). UL testing of Stat-X agents included Class B fire extinguishment tests performed with n-Heptane fuel with a flash point temperature of 24°F/-4°C, representative of flammable liquids of Class 1A, 1B, and 1C.
The US Navy also commissioned qualification performance tests with Stat-X agents for use as a replacement for obsolete halon 1301 systems on naval landing craft. Fire experiments were conducted in a27 m3 (957 ft3) enclosure, representative of a marine flammable liquid store room (FLSR). Testing was performed at the Naval Research Laboratory (NRL) near Chesapeake Beach, MD. The mock-up was purposely constructed with an equivalent fixed leakage area of 45 in². Fuels tested included n-Heptane, methanol, and paint thinner.
Stat-X products are available as 3 families of products that can be used in FLSR applications including:
The Stat-X family of products offers environmentally friendly effective fire protection for areas with flammable liquid hazards. Safe for human exposure, highly reliable disposable units with low maintenance and a 10 year shelf life, facilities will find aerosol fire suppression systems very economical compared with traditional gas and water based fire protection systems.
The advanced technology used by Stat-X products is covered by NFPA® 2010 Standard for Fixed Aerosol Fire-Extinguishing Systems.
The Challenge: A major global manufacture of roofing materials suffered a deepseated fire in a large 20,000 gallon mixing container that spread via duct work to multiple sealed containers. In order to prevent the spreading of fire though the ductwork the customer needed to find a flexible low-cost effective solution – and quickly.
Alternatives Considered: A CO2 system was evaluated vs Stat-X® aerosol fire suppression system.
The Solution: A combination of an integrated detection, damper and Stat-X Solution using Stat-X 250 E and 500E units in the ductwork and mixing containers.
1. Installation of DAF heat detectors in the ductwork.
2. Installation of dampers to prevent the spread of fire.
3. Installation of a Stat-X suppression system to suppress the fire and prevent it from spreading.
4. Installation of Stat-X generators to discharge inside of the mixing containers to prevent a deep-seated hazard from starting.