WILLIAMS CLASS B AR-AFFF 1%x3% Concentrate Foam Pail - 704071

WILLIAMS CLASS B AR-AFFF 1%x3% Concentrate Foam Pail - 704071

THUNDERSTORM W813A 1×3 AR-AFFF (Alcohol Resistant Aqueous Film-Forming Foam) Concentrate from Williams Fire & Hazard Control delivers exceptional firefighting performance, continuing the renowned heritage of THUNDERSTORM products. THUNDERSTORM W813A Concentrate combines fluoro- and hydrocarbon-surfactant technologies to provide superior fire and vapor suppression for Class B polar solvent and hydrocarbon fuel fires. This synthetic foam concentrate is intended for forceful or gentle firefighting applications at 1% solution on hydrocarbon fuels and gentle firefighting applications at 3% solution on polar solvent fuels in fresh, salt, or hard water.

THUNDERSTORM W813A foam solution utilizes three suppression mechanisms intended for rapid fire knockdown and
superior burnback resistance:

• The foam blanket blocks oxygen supply to the fuel
• Liquid drains from the foam blanket and forms either: An aqueous film on a hydrocarbon fire, or A polymeric membrane on a polar solvent fire which suppresses the vapor and seals the fuel surface
• The water content of the foam solution produces a cooling effect for additional fire suppression

TYPICAL PHYSIOCHEMICAL PROPERTIES AT 77 °F (25 °C)

• Appearance Viscous Purple Liquid
• Density 1.05 ± 0.02 g/ml
• pH 7.0 - 8.5
• Refractive Index 1.3640 minimum
• Viscosity* 3,000 ± 500 cps at 30 rpm
• Viscosity* 1,800 ± 300 cps at 60 rpm
• Spreading Coefficient 3.0 dynes/cm minimum at 1% dilution
• Pour Point 23 °F (-5 °C)
• Freeze Point 21 °F (-6 °C)
• Brookfield Viscometer Spindle #4

THUNDERSTORM W813A Concentrate is a non-Newtonian fluid that is both pseudoplastic and thixotropic; therefore dynamic viscosity will decrease as shear increases. The environmentally-mindful THUNDERSTORM W813A 1x3 AR-AFFF Concentrate formulation contains short-chain, C-6 fluorochemicals manufactured using a telomer-based process. The telomer process produces no PFOS, and these C-6 materials do not breakdown to yield PFOA. The fluorochemicals used in the concentrate meet the goals of the U.S. Environmental Protection Agency 2010/15 PFOA Stewardship Program.010009

Approvals, Listings, and Standards

THUNDERSTORM W813A 1×3 AR-AFFF Concentrate is designed in accordance with National Fire Protection Association (NFPA) Standard 11 for Low-, Medium-, and High-Expansion Foam. The concentrate is approved, listed, qualified under, or meets the requirements of the following specifications and standards:

• UL Standard 162, Foam Liquid Concentrate
• ULC S564, Category 2 Foam Liquid Concentrate
• EN 1568:2008 – Parts 3, 4

The THUNDERSTORM W813A formulation has been successfully evaluated in accordance with the Williams Fire & Hazard Control Plunging Test protocol.

Application

THUNDERSTORM W813A 1x3 AR-AFFF Concentrate is intended for use on both types of Class B fires: hydrocarbon fuels with low water solubility, such as crude oils, gasolines, diesel fuels, and aviation fuels; and polar solvent fuels with appreciable water solubility, such as methyl and ethyl alcohol, acetone, and methyl ethyl ketone. The concentrate also has excellent wetting properties that can effectively combat Class A fires. To provide even greater fire protection capability, THUNDERSTORM W813A foam solution may be applied simultaneously with WILLIAMS FIRE & HAZARD CONTROL PKW dry chemical for a twin-agent system. When using twin-agent application on polar solvent fuels, care must be taken with the velocity of the dry chemical discharge to minimize submergence of the polymeric membrane below the fuel surface.

THUNDERSTORM W813A Concentrate can be ideal for emergency response and semi-fixed firefighting applications
such as:

• Flammable liquid in depth and spill fires
• Fuel or chemical storage tanks
• Industrial chemical and petroleum processing facilities
• Truck/rail loading and unloading facilities
• Mobile equipment

Foaming Properties

THUNDERSTORM W813A 1x3 AR-AFFF Concentrate may beeffectively applied using most conventional foam discharge equipment at the correct dilution with fresh, salt, or hard water. For optimum performance, water hardness should not exceed 500 ppm expressed as calcium and magnesium.

THUNDERSTORM W813A Concentrate requires low energy to foam and the foam solution may be applied with aspirating and non-aspirating discharge devices. Aspirating discharge devices typically produce expansion ratios from 3.5:1 to 10:1, depending on the type of device and the flow rate. Non-aspirating devices, such as handline water fog/stream nozzles or standard sprinkler heads, typically produce expansion ratios from 2:1 to 4:1.

Medium expansion discharge devices typically produce expansion ratios from 20:1 to 60:1.

TYPICAL FOAM CHARACTERISTICS** (Fresh and Salt Water)

• Hydrocarbon Polar Solvent
• Proportioning Rate 1% 3%
• Expansion Ratio ≥ 7.0 ≥ 7.0
• 25% Drain Time (min:sec) ≥ 4:00 ≥ 17:00
• 50% Drain Time (min:sec) ≥ 7:00 ≥ 21:00

** per EN 1568-3, 2008 protocol using UNI86 aspirating nozzle

Proportioning

The recommended operational temperature range for THUNDERSTORM W813A 1x3 AR-AFFF Concentrate is
35 °F to 120 °F (2 °C to 49 °C). This foam concentrate can be correctly proportioned using most conventional, properly calibrated, in-line proportioning equipment such as:

• Balanced and in-line balanced pressure pump proportioners
• Balanced pressure bladder tanks and ratio flow controllers
• Around-the-pump type proportioners
• Fixed or portable in-line venturi type proportioners
• Handline nozzles with fixed eductor/pick-up tubes