Flammability is defined as how easily something will burn or ignite, causing fire Fire is the rapid oxidation of a material in the chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition or combustion Combustion or burning is the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species. The release of heat can result in the production of light in the form of either glowing or a flame. Fuels of interest often include organic compounds in the gas, liquid or. The degree of difficulty required to cause the combustion of a substance is quantified through fire testing A fire test is a means of determining whether or not fire protection products meet minimum performance criteria as set out in a building code or other applicable legislation. Successful tests in laboratories holding national accreditation for testing and certification result in the issuance of a certification listing. The listing is public domain,. Internationally, a variety of test protocols exist to quantify flammability. The ratings achieved are used in building codes A building code, or building control, is a set of rules that specify the minimum acceptable level of safety for constructed objects such as buildings and nonbuilding structures. The main purpose of building codes are to protect public health, safety and general welfare as they relate to the construction and occupancy of buildings and structures, insurance requirements, fire codes and other regulations governing the use of building materials as well as the storage and handling of highly flammable substances inside and outside of structures and in surface and air transportation. For instance, changing an occupancy Occupancy in building construction and building codes is the use or intended use of a building or part thereof for the shelter or support of persons, animals or property. A closely-related meaning is the number of units in such a building that are rented or leased, or otherwise in-use. The lack of occupancy in this sense is a vacancy by altering the flammability of the contents requires the owner of a building Buildings come in a wide amount of shapes and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, to land prices, ground conditions, specific uses and aesthetic reasons to apply for a building permit to make sure that the overall fire protection Fire protection is the study and practice of mitigating the unwanted effects of fires. It involves the study of the behaviour, compartmentalisation, suppression and investigation of fire and its related emergencies, as well as the research and development, production, testing and application of mitigating systems. In structures, be they land-based, design basis of the facility can take the change into account.
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Testing
A fire test A fire test is a means of determining whether or not fire protection products meet minimum performance criteria as set out in a building code or other applicable legislation. Successful tests in laboratories holding national accreditation for testing and certification result in the issuance of a certification listing. The listing is public domain, can be conducted to determine the degree of flammability. Test standards used to make this determination but are not limited to the following:
- Underwriters Laboratories Underwriters Laboratories Inc. is an independent product safety certification organization that was established in 1894. Based in Northbrook, Illinois, UL develops standards and test procedures for products, materials, components, assemblies, tools and equipment, chiefly dealing with product safety. UL also evaluates and certifies the efficiency UL 94 Flammability Testing
- International Electrotechnical Commission The International Electrotechnical Commission is a non-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology". IEC standards cover a vast range of technologies from power IEC 60707, 60695-11-10 and 60695-11-20
- International Organization for Standardization The International Organization for Standardization , widely known as ISO (pronounced /ˈaɪsoʊ/ EYE-soe), is an international-standard-setting body composed of representatives from various national standards organizations. Founded on 23 February 1947, the organization promulgates worldwide proprietary industrial and commercial standards. It has ISO 9772 and 9773.
- National Fire Protection Association The National Fire Protection Association is a U.S. organization (albeit with some international members) charged with creating and maintaining minimum standards and requirements for fire prevention and suppression activities, training, and equipment, as well as other life-safety codes and standards. This includes everything from building codes to NFPA 287 Standard Test Methods for Measurement of Flammability of Materials in Cleanrooms Using a Fire Propagation Apparatus (FPA)
- NFPA 701: Standard Methods of Fire Tests for Flame Propagation of Textiles and Films
Categorization of building materials
Materials can be tested for the degree of flammability and combustibility in accordance with DIN 4102. DIN 4102, as well as its British cousin BS 476 include for testing of passive fire protection Passive fire protection is an integral component of the three components of structural fire protection and fire safety in a building. PFP attempts to contain fires or slow the spread, through use of fire-resistant walls, floors, and doors (amongst other examples). PFP systems must comply with the associated Listing and approval use and compliance systems System is a set of interacting or interdependent entities forming an integrated whole, as well as some if its constituent materials. The following are the categories in order of degree of combustibility as well as flammability:
- A1 (100% noncombustible = nichtbrennbar)
- A2 (~98% noncombustible = nichtbrennbar)
- B1 difficult to ignite (schwer entflammbar) Example: intumescents An intumescent is a substance which swells as a result of heat exposure, thus increasing in volume, and decreasing in density. Intumescents are typically used in passive fire protection and, in America, require listing and approval use and compliance in their installed configurations in order to comply with the law and some high end silicones Silicones are inert, synthetic compounds with a wide variety of forms and uses. Typically heat-resistant and rubber-like, they are commonly used in cookware, medical applications, sealants, adhesives, lubricants, insulation, and breast implants
- B2 normal combustibility (like wood Wood is a hard, fibrous tissue found in many plants. It has been used for centuries for both fuel and as a construction material for several types of living areas such as houses. It is an organic material, a natural composite of cellulose fibers embedded in a matrix of lignin which resists compression. In the strict sense wood is produced as)
- B3 easily ignited (leichtentflammbar)
Important characteristics
Flash point
Flash points Flash point of a volatile liquid is the lowest temperature at which it can vaporize to form an ignitable mixture in air. Measuring a liquid's flashpoint requires an ignition source. This is not to be confused with the autoignition temperature, which requires no ignition source. At the flash point, the vapour may cease to burn when the source of below 100 °F Fahrenheit is the temperature scale proposed in 1724 by, and named after, the physicist Daniel Gabriel Fahrenheit . Today, the temperature scale has been replaced by the Celsius scale in most countries. It is still in use in few nations, such as United States and Belize (38 °C Celsius is a temperature scale that is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale two years before his death. The degree Celsius (°C) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval (a difference between two temperatures) are regulated in the United States ^ b. English is the de facto language of American government and the sole language spoken at home by 80% of Americans age five and older. Spanish is the second most commonly spoken language by OSHA The United States Occupational Safety and Health Administration is an agency of the United States Department of Labor. It was created by Congress of the United States under the Occupational Safety and Health Act, signed by President Richard M. Nixon, on December 29, 1970. Its mission is to prevent work-related injuries, illnesses, and occupational as potential workplace hazards.
Vapor pressure
- The vapor pressure Vapor pressure or equilibrium vapor pressure are the pressure of a vapor in thermodynamic equilibrium with its condensed phases in a closed bottle. All liquids and solids have a tendency to evaporate into a gaseous form, and all gases have a tendency to condense back to their liquid or solid form is an important parameter in determining the ease of ignition. The higher the vapor pressure, the more flammable vapor is evolved from a free liquid surface at a given temperature.
Examples of flammable liquids
- Gasoline Gasoline or petrol is a petroleum-derived liquid mixture which is primarily used as a fuel in internal combustion engines. It is also used as a solvent, mainly known for its ability to dilute paints / C8H18
- Ethanol Ethanol, also called ethyl alcohol, pure alcohol, grain alcohol, or drinking alcohol, is a volatile, flammable, colorless liquid. It is a powerful psychoactive drug and one of the oldest recreational drugs. It is best known as the type of alcohol found in alcoholic beverages and thermometers. In common usage, it is often referred to simply as / C2H6O
- Isopropanol Isopropyl alcohol is a common name for a chemical compound with the molecular formula C3H8O. It is a colorless, flammable chemical compound with a strong odor. It is the simplest example of a secondary alcohol, where the alcohol carbon is attached to two other carbons sometimes shown as (CH3)2CHOH. It is a structural isomer of propanol / C3H8O
- Methanol Methanol, also known as methyl alcohol, wood alcohol, wood naphtha or wood spirits, is a chemical with formula C / CH3OH
- Acetone Acetone is the organic compound with the formula 2CO. This colorless, mobile, flammable liquid is the simplest example of the ketones. Owing to the fact that acetone is miscible with water it serves as an important solvent in its own right, typically as the solvent of choice for cleaning purposes in the laboratory. More than 3 million tonnes are / CH3COCH3
- Nitromethane Nitromethane is an organic compound with the chemical formula CH3NO2. It is the simplest organic nitro compound. It is a slightly viscous, highly polar liquid commonly used as a solvent in a variety of industrial applications such as in extractions, as a reaction medium, and as a cleaning solvent. As an intermediate in organic synthesis, it is / CH3NO2
Examples of nonflammable liquids
- Water Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state, water vapor or steam
- Carbon tetrachloride Carbon tetrachloride, also known by many other names is the organic compound with the formula CCl4. It was formerly widely used in fire extinguishers, as a precursor to refrigerants, and as a cleaning agent. It is a colourless liquid with a "sweet" smell that can be detected at low levels
Classification of Degree of Flammability
The US Government uses the Hazardous Materials System Identification System (HMIS) standard for Flamability Ratings, as do many US regulatory agencies, and also the US National Fire Protection Association (http://www.nfpa.org). The ratings are as follows:
0 Materials that will not burn.
1 Materials that must be preheated before they will ignite.
2 Materials that must be moderately heated or exposed to relatively high ambient temperatures before they will ignite.
3 Liquids and solids that can ignite under almost all temperature conditions.
4 Materials which will rapidly vaporize at atmospheric pressure and normal temperatures, or are readily dispersed in air and which burn readily.
Codes
Flammability
For existing buildings, fire codes focus on maintaining the occupancies Occupancy in building construction and building codes is the use or intended use of a building or part thereof for the shelter or support of persons, animals or property. A closely-related meaning is the number of units in such a building that are rented or leased, or otherwise in-use. The lack of occupancy in this sense is a vacancy as originally intended. In other words, if a portion of a building were designed as an apartment An apartment or flat (in British English and often associated with or miscontrued as social housing) is a self-contained housing unit (a type of residential real estate) that occupies only part of a building. Such a building may be called an apartment building, especially if it consists of many apartments for rent. Apartments may be owned by an, one could not suddenly load it with flammable liquids and turn it into a gas storage facility, because the fire load and smoke development in that one apartment would be so immense as to overtax the active fire protection Fire can be controlled or extinguished, either manually or automatically. Manual includes the use of a fire extinguisher or a Standpipe system. Automatic means can include a fire sprinkler system, a gaseous clean agent, or fire fighting foam system. Automatic suppression systems would usually be found in large commercial kitchens or other high- as well as the passive fire protection Passive fire protection is an integral component of the three components of structural fire protection and fire safety in a building. PFP attempts to contain fires or slow the spread, through use of fire-resistant walls, floors, and doors (amongst other examples). PFP systems must comply with the associated Listing and approval use and compliance means for the building. The handling and use of flammable substances inside a building is subject to the local fire code, which is ordinarily enforced by the local fire prevention officer.
Linguistics: Flammable vs. inflammable
The word “inflammable” came from Latin “'inflammāre” = “to set fire to,” where the prefix “'in-”' means “in” as in “inside”, rather than “not” as in “invisible” and “ineligible”. Nonetheless, “inflammable” is often erroneously thought to mean “non-flammable”. To avoid this safety hazard Occupational safety and health is a cross-disciplinary area concerned with protecting the safety, health and welfare of people engaged in work or employment. The goal of all occupational safety and health programs is to foster a safe work environment. As a secondary effect, it may also protect co-workers, family members, employers, customers,, “flammable”, despite not being the proper Latin-derived term, is now commonly used on warning labels when referring to physical combustibility.[1]
See also
- Fire test A fire test is a means of determining whether or not fire protection products meet minimum performance criteria as set out in a building code or other applicable legislation. Successful tests in laboratories holding national accreditation for testing and certification result in the issuance of a certification listing. The listing is public domain,
- Fire protection Fire protection is the study and practice of mitigating the unwanted effects of fires. It involves the study of the behaviour, compartmentalisation, suppression and investigation of fire and its related emergencies, as well as the research and development, production, testing and application of mitigating systems. In structures, be they land-based,
- Active fire protection Fire can be controlled or extinguished, either manually or automatically. Manual includes the use of a fire extinguisher or a Standpipe system. Automatic means can include a fire sprinkler system, a gaseous clean agent, or fire fighting foam system. Automatic suppression systems would usually be found in large commercial kitchens or other high-
- Passive fire protection Passive fire protection is an integral component of the three components of structural fire protection and fire safety in a building. PFP attempts to contain fires or slow the spread, through use of fire-resistant walls, floors, and doors (amongst other examples). PFP systems must comply with the associated Listing and approval use and compliance
- Flammable liquids
- Lower flammable limit
- Upper flammable limit
References
External links
- Videos showing flammability of cables based on jacket rating
- Fire Performance of Ageing Cable Compounds, NFPA Treatise by Dr. Perry Marteny
Categories: Fire prevention | Thermodynamics
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Sat, 03 Jul 2010 03:38:54 GMT+00:00
I-Newswire.com (press release) Because of the flammability of these objects, the flames can spread quickly. Without the aid of an automatic extinguishing system, it could be too late by ...
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Flammability Handbook for Plastics Fifth Edition Technomic Publishing Co Inc
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ue, 15 Jun 2010 21:00:00 GM
To be declared a hazardous waste site, there are four requirements: . flammability. , reactivity, corrosivity and toxicity. Hello? Junior's room totally meets all of them. Look, at great personal danger to myself, I have gone into that room ...
Q. and discuss also the difference between the organic and inorganic compound based on conductibility,combustibi lity and bonding.
Asked by archer - Thu Jul 13 00:12:43 2006 - - 1 Answers - 0 Comments
A. most of the inorganic compounds are soluble in water whereas most of the organic compounds are insoluble in water,they are soluble in carbon tetrachloride,alcohol,ben zene etc.while most of the organic compounds are inflammable because of being made up of C and H and having low flash and fire points most of the inorganic compounds are not inflammable
Answered by raj - Thu Jul 13 00:23:36 2006
