ISO/TR 5660-3:2003 pdf download.Reaction-to-fire tests — Heat release, smoke production and mass loss rate — Part 3: Guidance on measurement.
ISO/TR 5660 consists of the following parts, under the general title Reaction-to-fire tests — Heat release,smoke production and mass loss rate:
— Part 1: Heat release rate (cone calorimeter method)
— Part 2: Smoke production rate (dynamic measurement)
— Part 3: Guidance on measurement [Technical Report]
ISO/TR 5660-3 examines the limitations of the cone calorimeter as currently used for building products and recommends ways in which some of these may be overcome for other types of products for other application areas. It compiles information from a large body of experience with regard to the use of the instrument into a set of guidelines which will help to standardize the use of the cone calorimeter in this wider scope.
ISO 5660-1, describing a test method for rate of heat release from building products by means of a cone calorimeter, was published in 1993 (first edition) following approximately ten years of development within ISO/TC 92, Fire safety, Subcommittee SC1, Fire initiation and growth.
The cone calorimeter is a fire test instrument in which horizontal specimens are exposed to controlled levels of radiant heating by means of a truncated cone-shaped heater. Continuous spark ignition is provided and the time to ignition is recorded for specimens which ignite. The rate of heat release from the burning specimen is determined from measurements of the amount of oxygen consumed from the air flowing through the apparatus, which has been demonstrated to equate to heat release. The mass of the specimen is also measured throughout the burning period. The specimens are usually tested under well ventilated conditions.
Results are expressed in terms of peak and average rates of heat release as well as total heat released and the effective net heat of combustion. ISO 5660-1 limits the specimen type to essentially flat. Several other groups are now utilizing the cone calorimeter and a number of new parameters in addition to those defined in ISO 5660-1 and ISO 566O-2have been defined and used. Some of these, including smoke measurement, require that measurements be made from the beginning of the test rather than at the onset of ignition which is commonly used as the starting point for heat release measurement.
The cone calorimeter is also designed to allow measurement of smoke and gases such as CO and CO Smoke measurement is the subject of ISO 5660-2. Further work is under way to define a quality control tool for measuring burning rates of building products. This will be published as ISO 17554 and is based or mass loss measurements using the thermal decomposition model of the cone calorimeter. A similar system which measures the temperature of combustion products generated by this apparatus and has been standardized by ISO/TC 61 as ISO 13927.The cone calorimeter fire model has also been used in a corrosivity International Standard developed by ISO/TC 61 as ISO 11907-424 The effect of the evolved gases on the resistance of a printed circuit board target is used to assess corrosivity.
During development of the cone calorimeter it arent that there was considerable interest in the use of the instrument for products other than bu lucts. Several standards have been developed by various national and international groups based on ISO 5660-1 and ISO 5660-2.
This part of ISO 5660 provides recommendations for the testing of products in the cone calorimeter and gives uidance on the presentation of the results. Supplementary guidance is given in documents referred to in References [1] and [2].ISO/TR 5660-3:2003 pdf download.
ISO/TR 5660-3:2003 pdf download
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