Foam, firefighting agents

Supplies of foam firefighting agents can be stored in portable trailers and totes taken to the site where they will be used. Trailers come in a variety of sizes. Smaller wheeled carts can be pushed by employees, while others need to be transported by a vehicle. 

Foams for firefighting appHcations are typically made from a concentrated foaming agent diluted with water and then mixed with air. Rather than consider the volume fraction of air in the foam, firefighting foams are characterized by their expansion ratio, which is the increase in volume of the Hquid after the foam is formed. Expansion ratios range from 5 1 to over 1000 1 ratios of 5 1 to 20 1 are called low expansion ratios of 21 1 to 200 1, medium expansion and ratios greater than 200 1, high expansion. 

Flammable liquid flash point (closed cup) -11°C (12°F) vapor pressure 160 torr at 20°C (68°F) vapor density 1.48 (air = 1) the vapor is heavier than air and can travel a considerable distance to a source of ignition and flash back autoignition temperature 322°C (612°F) fire-extinguishing agent dry chemical or alcohol foam firefighting should be done from an explosion-resistant area use water to flush and dilute any spill and to keep Are-exposed containers cool. Ethylenimine may polymerize under fire conditions. The reaction is exothermic, which may cause violent rupture of the container. 

Carboxymethyl cellulose, - methylcellulose, - alginates and especially - guar gum and its derivatives are applied as thickeners in foam-based agents and as gellants for water used in forest firefighting by airplane. 

Firefighting foam is the extinguishing agent typically utilized for flammable and combustible liquid storage tank protection. Protection is through fixed and manual systems for tanks. Such systems require ... 

Where water supplies are inadequate for conventional firefighting and foam making, automatically activated fixed clean agent or CO2 systems may be considered for seal fire protection. The agent should be discharged into the seal area below the secondary seal. Fire detection options for these automatic systems include reusable thermal wires and pneumatic tube devices. Thermal wire is typically the more economical choice. 

In order to develop efficient techniques for the preparation and application of foams in industry, agriculture, firefighting, etc., it is necessary to know the physicochemical parameters of surfactants and their relationship with the foam stabilising ability of the surfactant solutions. Usually the criterion of the surfactant foaming ability is the adsorption of these compounds at the solution/air interface and the related to it properties, such as decrease in surface tension, adsorption work, maximum adsorption T. [13,39,43]. CMC is often used as a characteristic of a foaming agent (if micellisation is possible in the surfactant solution). Parameters related to foam stability, such as foam lifetime and foam column height, are also employed [12,13,39],... 

Texin. [Henkel Canada Henkel KGaA] Sodium sulfosuccinates wetting agent, detergent, emulsifier for household and industrial cleaners, hand soaps, glass, metal cleaners, dust repellents, firefighting foams. 

EXPLOSION and FIRE CONCERNS when heated to decomposition, emits toxic fumes of NOx incompatible or reacts with acids, acid anhydrides, and oxidizing agents forms hazardous decomposition products such as nitrogen oxides, carbon dioxide, carbon monoxide, hydrogen fluoride, nitrogen use dry chemical, water spray or mist, chemical foam, or alcohol-resistant foam for firefighting purposes. 

EXPLOSION and FIRE CONCERNS dangerous fire hazard NFPA rating (not available) emits toxic fumes of CF when heated to decomposition incompatible with reducing agents use carbon dioxide, foam, or dry chemical for firefighting purposes. 

EXPLOSION and FIRE CONCERNS flammable liquid NFPA rating Health 2, Flammability 3, Reactivity 1 reacts violently with nitric acid, oleum and chlorosulfonic acid may accumulate static electricity forms explosive peroxides incompatible with oxidizing agents combustion may produce hazardous by-products, such as carbon monoxide or carbon dioxide use carbon dioxide, dry chemical powder, or foam for firefighting purposes. 

EXPLOSION and FIRE CONCERNS combustible liquid incompatible with strong oxidizing agents, bases, aluminum, magnesium, tin, and their alloys when heated to decomposition emits toxic hydrogen chloride, hydrogen bromide, carbon monoxide, and carbon dioxide fumes use carbon dioxide, dry chemical, or appropriate foam for firefighting purposes. 

EXPLOSION and FIRE CONCERNS combustible with evolution of chlorine at 210°C (410°F) NFPA rating (not rated) may form explosive mixtures with xylene reaction with water or steam will produce poisonous and corrosive fumes incompatible with strong acids contact with easily oxidized materials (such as ammonia salts and sulfides), will result in fire and explosion heating to decomposition emits toxic fumes of chlorine and oxides of nitrogen use dry chemical, foam, carbon dioxide, or other extinguishing agent suitable for firefighting purposes. 

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