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Total Flooding Agent Highlights 
 
NAF SIII is a clean agent to replace Halon in total flooding systems. 
NAF SIII is the only "Drop-In" agent safe for occupied spaces. 
NAF SIII has been recognised as an for the use in "occupied area" by the US Environmental Protection Agency (EPA) in The Significant New Alternative Policy (SNAP). 
NAF SIII has been included in NFPA 2001 Standard. 
NAF SIII is the most effective of the Proposed substitutes for Halon 1301 for "occupied areas". 
NAF SIII is the result of many years of Research and development; it is a unique Blend of different Halocarbons, with a Detoxifying additive called NAF XX, which considerably reduces decomposition by-products. 
With an Ozone Depletion Potential (ODP) of 0.04, a Global Warming Potential (GWP) of 0.1 and an Atmospheric Life Time (ALT) of 7 years, NAF SIII is overall the environmentally safest replacement for Halon 1301. 
NAF SIII contains no Bromine, the most damaging substance to the Ozone Layer. 
NAF SIII is effective on A, B and C type of Fires. 
NAF SIII is available in unlimited quantities. 
NAF SIII is also certified or listed by many international bodies: ask for an updated list of references. 
 
General Information: Identification
 
NAF SIII has been identified as "HCFC Blend A" in the standard NFPA 2001 and in the EPA "SNAP" list. 
USE 

NAF SIII has been developed as a total flooding agent replacement for Halon 1301. It is effective on Class A, B and C type fires, as defined by NFPA. 

Although each potential Hazard presents a unique problem to the system designer, the installation of a NAF SIII system would be advantageous in one or more of the following circumstances: 

When an inert, electrically non-conducting media is essential or desirable. 
When clean-up of another media would present a problem. 
When weight and/or space versus extinguishing potential is a factor. 
When there is difficulty in ensuring the safety of the personnel. 
Where such a system would be more economical to install than a system using another agent, but would be as efficient. 
Where the physical properties of another media would represent problems in terms of product distribution. 
Its high extinguishing capability and low order of toxicity, together with its low environmental impact, make the use of this product particularly advantageous for the following hazardous situation: computer and equipment rooms, oil switch-gear, control rooms, chemical and physical laboratories, military vehicles, aircraft engines, and cargo and passengers compartments, microwave relay station areas, flammable liquid storage or process areas, telephone equipment areas, transformers and conventional or nuclear plants, radioactive "caves" and hot cells, archive storage. 

Underwriters Laboratories of Canada listed NAF SIII as a Clean Agent for extinguishing system under the Component Recognition Program. Engineered and Pre-engineered system containing NAF SIII are Underwriters Laboratories of Canada listed. UL and FM listing using other equipment are in progress in the US. 
 
Technical Information: Physical Properties
 
Property NAF SIII HALON 1301
Molecular Weight 92,90 148,95
Boiling Point @ 1 ATM. C -38,30 -57,80
Critical Temperature C 125 67
Critical Pressure (bar) 66,50 39,6
Critical Density /Kg./m3) 580 745
Vapour Pressure @ 20 C (bar) 8,14 14,5
Liquid Density @ 25 C (g/ml) 1,20 1,57
Specific Heat of Liquid @ 25 C J/(kgC) 1.250 910
Heat of Vaporisation @ Boiling Point. (KJ/Kg) 227 120,90
Viscosity of Liquid 25 C (centipoise) 0,21 0,16
Extinguishing Equivalent Weight (n-heptane) 1.09 1
Solubility in Water 25 C (% weight) 0,08 0,03
Physical State Liquid/vapore Liquid/vapore
Freezing C <-107 -168
 
Extinguishing Capabilities
 
Underwriters' Laboratories of Canada states that: 

"NAF SIII was found to comply with the requirements of Underwriter's Laboratories of Canada for this class of equipment, as included under ULC Subject C1058". " These system units are capable of being installed in accordance with the applicable sections of the Standard of the National Fire Protection Association for Clean Agent extinguishing System, NFPA 2001". 
 
Minimum And Design Extinguishing Concentration (N-Heptane)
 
  G / m3 @ 20 C % in volume
NAF SIII 300 - 360 7.2 - 8.6
HALON 1301 276 - 331 4.2 - 5

A recent study by Factory Mutual Research Corporation reports that there are three main factors influencing the discharge times of Halon 1301 and alternatives system. 

These three factors are: 

Vapour Pressure 
Gas Density 
Heat of Vaporisation 
Discharge times are reduced as vapour pressure and gas density decrease as the heat of vaporisation increases. NAF SIII has lower vapour pressure and gas density than Halon 1301 and a much higher heat of vaporisation. These factors are all favourable for NAF SIII. 
 
Toxicity
 
NAF SIII itself ontroduces no risk, although as with Halon 1301 the decomposition by-products could pose a risk. Indipendent testing by British Columbia Research Corp. Has concluded that the detoxifying additive NAF XX component, when exposed to high temperature flames, reduces acid toxic fumes. The detoxifying agent in NAF SIII scavenges the more toxic halogenated compounds from the atmospgere ("Testing of Extinguishing Capabilities, Toxicity and Determination of Physical Properties of NAF SIII", September 16th, 1991).  
 
 
Decomposition By-Products
 
    NAF SIII with XX NAF SIII without XX
HCL ppm 1.6 5.4
Mg/m3 2,5 8.2
F2 ppm 2.6 13.4
Mg/m3 4,1 21,1
CI2 ppm 0.2 0.8
Mg/m3 0,5 2,2
COX2 ppm <0.02 0.15
As COCL2 mg/m3 <0.09 0.6
 
The undercomposed toxicity of chemicals is given by its Acute Toxicity Concentration (LC50); the LC50 represents the concentration lethal to 50% of a population of rats in laboratory testing. 
 
Acute Toxicity
 
  NAF SIII HALON 1301
LC50 15 min. (ppm) 700,000 830,000

The LC50 for 15 minutes exposure for NAF SIII is 700.000 ppm (or 70%). Such concentration is far higher than the concentration that would be encountered in a real fire situation. Personnel may be exposed to NAF SIII vapours in low concentrations for short periods of times without risk to their health or safety. As with Halon 1301, exposure ti high concentrations for prolonged periods may produce dizziness, impaired co-ordination and disturbances in cardiac rhythm. 
 
Safe Concentrations Of Naf SIII
 
 
  Concentration by volume in air Maximum time for exposure
Normally Occupied Areas 10% 10 minutes

The US EPA and the NFPA requested an independent laboratory to conduct tests on cardiac sensitisation. Such tests - that have followed the published methodology of reinhardt - have established that until the concentration of NAF SIII reaches 10%, certain effects of cardiac sensitisation cannot be verified. Consequently it has been established that the NOAEL (No Observed Adverse Effect Level) and the LOAEL (Lowest Observed Adverse Effect Level) are greater than the 10% concentration of NAF SIII. ("Bio-Research Laboratories Project Number 90658B").
 
Cardiac Sensitisation
 
  NAF SIII HALON 1301
NOAEL
(No Observed Adverse Effect Level) 10% 5%
LOAEL
(Lowest Observed Adverse Effect Level) > 10% 7.5%

Unlike Halon 1301, NAF SIII contains no Bromine. It is Bromine that makes Halons more damaging to the ozone. 

HCFCs, components of NAF SIII, as similar compound to Hydrocarbons - such as methane or ethane - where chlorine and fluorine atoms have partially been substituted by Hydrogen. The presence of Hydrogen allows HCFC to rapidly degrade in the low atmosphere due to natural processes. 


NAF SIII has an Ozone Depletion Potential of 0.04; this potential has been independently confirmed by British Columbia Research Corp. And by New Mexico Engineering Research Institute. 
The Green House Effect is becoming a key factor to evaluate the viability of Halon 1301 alternatives. NAF SIII has a Global Warming Potential of 0.1, as confirmed by British Columbia Research Corp. 
Strictly correlate to the Global Warming Potential is the Atmospheric Life Time (ALT). NAF SIII' s ALT is 7 years, the lowest of any of the replacement agents. 
 
 
Enviromental Impact
 
  NAF SIII HALON 1301
ODP 0.04 16
GWP 0.1 0.8
ALT 7 >110
 
Applicatins and Costs
 
NAF SIII, available in unlimited quantities, presents itself as the only "Drop-In" replacement for Halon 1301; to use NAF SIII IN EXISTING TOTAL FLOODING SYSTEM AND PLANNED PROJECT FOR Halon 1301, it is not necessary to undertake major changes to the system. 

Requiring only 9% more weight compared to Halon 1301 (360 grams per cubic meter @ 20C against 331 grams of Halon 1301), the NAF SIII necessary to project a certain volume can be discharged in 10 seconds, the period required by the standard /NFPA) without the necessity of redesigning the nozzles, at modest cost, will be necessary. In addition physical properties are close to Halon 1301 meaning easy system design. 

The costs of substitution of Halon 1301 with NAF SIII are, therefore, minimal, due to the characteristics of "Drop-In" capability. 

This characteristic is also relevant for new installations, since the reduced quantity of NAF SIII compared to the other alternatives that are currently available results in a cost effective installation. 

A computer software program, which is now under final approval by ULC, is already available, which enables users to design a fully engineered system or to assess the suitability of a retrofitting of NAF SIII, into any existing Halon 1301 installation. 

The installation of an inert gas system often would require at least 10 times the number of cylinders that are required for a Halon 1301 installation or the "Drop-In" NAF SIII system. 
 
Evaluation Of Halon 1301 Alternatives
 
CO2 

The effectiveness of CO2 is by its action of suffocation of the flame by the reduction of oxygen. In order to obtain extinction of oil fires, CO2 must reach a concentration of 34%. Note: a concentration of 9% is sufficient to induce unconsciounsness and a concentration of 20% is lethal. 

The CO2 is a very dense product. In order to obtain acceptable performance in terms of extinction, a quantity of at least 5 times that of the Halon 1301 (and the NAF SIII) is necessary. In consequence the installations of co2 RESULTS IN A HIGHER COST; IN THE CASE OF SUBSTITUTION OF A Halon system with CO2 it will be vecessary ti replace the entire system. 

The extreme low temperature of CO2, on discharde can cause thermal shock such that it is harmuful to delicate electronic components in the protected area. 

Enormous risk to human life are posed when this product is used in "occupied areas", thus a CO2 system has to be operated manually in order to allow evacuation, this delay allowing further propagation of the fire. 

POWDERS 

Powders can create respiratory problems, they are irritants, corrosive and damaging to delicate electronic apparatus in the protected area. On discharge the visibility is reduced, causing problems with emergency evacuation procedures. 

HFC 

Latest studies have shown that HFCS, due to the stability of their molecules, can affest the environment with their very long Lifetime in the Atmosphere. HFCS are also thought to contribute to the deterioration of the ozone layer. 

They are included in the "President Clinton Climate Change Action Plan" (CCAP).Under this plan, EPA is directed to limit uses of greenhouse gases. In addition HFCS ARE INCLUDED IN "The Climate Change Program" of United Kingdom. 

While some HFCS with a very low boiling point prsent application difficulties (high pressure Cylinders), other HFCS have a boiling point that is too high to ensure optimum distribution in the protected area. 

The quantities of HFC necessary to obtain extinction impede their use as a "drop-in" Halon 1301 alternative. This results in an increase in the cost of new installationsand precludes the "retrofit" of the existing Halon 1301 system at acceptable costs. 

EPA expressed concern about decomposition by-product of HFC as they "potentially decompose into greater amounts of hydrogen fluoride (HF)than do HCFCS, depending on the number of fluorine in the molecule". The high level of hydrogen fluoride can lead to a highly corrosive atmosphere being produced. 

FOAMS 

Most of the foams, seen from an environmental point of view, are not biodegradable; moreover they could be toxic to flora and marine fauns. 

This type of product causes great damage to every kind of apparatus, making the eventual clean-up costly. 

INERT GASES 

Inert Gases cannot replace Halon 1301 in existing installations; the same consideratins relative to the installations of CO2 are valid. 

The US EPA and the NFPA have advised certain limitations in the utilisation of mixes of inert gas in human "accupied areas" the design concentration used must ensure a residual oxygen concentration used of at least 10%, while the level of CO2 will have to be at least 5%; if the concentration of oxygen goes below 10%, personnel will have to evacuate the area within 30 seconds. 

In additon, all Inert Gases put on the market require a long discharge time compared to the 10 second for Halocarbons agent, it means an exponential increase of damages and combustion products. 
 
Naf PIII Streaming Agent Highlights
 
NAF PIII is a "Drop-In" substitute of Halon 1211. 
NAF PIII is a unique Blend of different Halocarbons, with a detoxifying additive called NAF XX which considerably reduces decomposition by-products. 
NAF PIII is a clean agent to replace Halon 1211 in portable and streaming applications. 
With an Ozone Depletion Potential (ODP) of 0.017, a Global Warming Potential (GWP) of 0.068 and an Atmospheric Lietime of only 3.3 years, NAF PIII is an environmentally safe replacement for Halon 1211. 
NAF PIII is effective on A, B and C types. 
NAF PIII is available in unlimited quantities. 
 
General Information: use
 
NAF PIII extinguishing has been developed as a replacement for Halon 1211. It is effective on Class A, B and C types fire, as defined by NFPA. Althought each potential hazard presents a unique problem, the use of NAF PIII would be advantageous in one of the following circumstances: 

When an inert, electrically non-conducting media is essential or desiderable. 
When clean-up of another media would present a problem. 
When weight and/or space versus extinguishing potential is a factor. 

It high extinguishing capability and low order of toxicity, together with its low environmental impact, renders the use of this product particularly advantageous for the following hazardous situations: Computer and equipment rooms, control rooms, chemical and scientific laboratories, military vehicles, aircraft engines, cargo and passengers compartments, flammable liquid storage or process areas, art treasures, museums, galleries, etc. 
 
Technical Information: Physical Properties
 
NAF PIII HALON 1211
Molecular Weight 140.02 165.4
Boiling Point @ 1 ATM. C from -1 to -2 -3.9
Critical Temperature C 177 154
Critical Pressure 45.6 bar. 43 bar
Critical Density (Kg./m3) 0.5 0.71
Liquid Density @ 25 C (g/ml) 1.36 1.8
Freezinf Point (C) -100 -161
Viscosity of Liquid 25 C (centipoise) 0.36 0.33
 
Extinguishing Capabilities
 
Fire extinguishing designed for Halon 1211 are suitable for NAF PIII; it is possible to archieve the same fire ratings as Halon 1211 with minor adjustment to the nozzle orifice. 
 
Toxicity
 
NAF PIII itself introduces no risk, although as with Halon 1211, the decomposition bu-products could pose a risk. 

The detoxifying additive NAF XX component, when exposed ti high temperature flames, reduces acid toxic fumes. 

The detoxifying agent in NAF PIII scavenges the more toxic halogenated compounds from the atmosphere, rendering them inert. 

The LC50 FOR 15 MINUTES EXPOSURE FOR NAF PIII is 214.000 ppm. 
 
Acute Toxicity
 
  NAF PIII HALON 1211
LC50 15 min. (ppm) 214,000 324,000
 
Environmental Impact
 
NAF PIII contains no Bromine. It is Bromine that makes Halons more damaing to the ozone. 

NAF PIII has an Ozone Depletion Potential of 0.017. 
The "Green House Effect" is becoming a key factor in evaluating the viability of Halon 1211 alternatives. NAF PIII has a global Warming Potential of 0.068. 
NAF PIII has an Atmospheric Lifetime of only 3.3 years. 
NAF PIII also identified as "HCFC Blend C" has been recognised as an "acceptable" replacement for Halon 1211 by the U.S. Environmental Protection Agency (EPA) in the Significant New Alternative Policy (SNAP) 

  NAF PIII HALON 1211
ODP 0.017 4
GWP 0.068 unknown
ALT (years) 3.3 > 25
 
Applications and Costs 
 
NAF PIII, available in unlimited quantities, is a "drop-in" replacement for Halon 1211; the use of NAF PIII in existing Halon 1211 fire extinguishing requires only minor nozzle orifice changes. 

The costs of substitution of Halon 1211 with NAF PIII are, therefore, minimal, due to the characteristics of it's "drop-in" capability. 
 
 
Gielle Srl - Afdeling Administratie
Via R. Ferri 1001 - 70022 Altamura (Ba) Italy
Tel +39 0803118998 - Fax + 39 0803101309
E-mail: info@fm200.biz 
free phone 24 hours
 
 
 


 

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