ISO/DIS 19700:2013 en

Bepaling van bij brand vrijkomende gevaarlijke stoffen onder constante pyrolysecondities - De stationaire buisoven

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Status Ontwerp
Aantal pagina's 48
Gepubliceerd op 08-07-2013
Taal Engels
This Standard describes the steady state tube furnace method for the generation of fire effluent for the identification and measurement of its constituent combustion products, in particular, the yields of toxicants under a range of fire decomposition conditions. It uses a moving test specimen and a tube furnace at different temperatures and air flow rates as the fire model. The interlaboratory reproducibility has been demonstrated for homogenous materials, and this Standard is therefore limited in applicability to such materials. The method is validated for testing homogeneous materials that produce yields of a defined consistency. This method has been designed as a TC 92 performance-based engineering method to provide data for input to hazard assessments and fire-safety engineering design calculations. The method can be used to model a wide range of fire conditions by using different combinations of temperature, non-flaming and flaming decomposition conditions and different fuel/oxygen ratios in the tube furnace. These include the following types of fires, as detailed in ISO 19706, Table 1: - Stage 1: Non-flaming: - Stage 1b) Oxidative pyrolysis from externally applied radiation; - Stage 2: Well-ventilated flaming (representing a flaming developing fire) (Note 1); - Stage 3: Under-ventilated flaming (Note 2): - Stage 3a) Small localised fires in closed or poorly ventilated compartments; - Stage 3b) Post-flashover fires. For each flaming fire type, the minimum conditions of test are specified in terms of the equivalence ratio Ø as follows: Stage 2: Ø< 0,75; Stages 3a) and 3b) Ø= 2 ± 0,2. Guidance on the choice of additional decomposition conditions is given in Annex A. The data on toxic product concentrations and yields obtained using this Standard may be used as part of the assessment of toxic potencies, in conjunction with toxic potency calculation methods in ISO 13344, and as an input to the toxic hazard assessment from fires in conjunction with fire growth and effluent dispersal modelling, and fractional effective dose (FED) calculation methods in ISO 13571. Application of data from the steady state tube furnace to the calculation of lethal toxic potency according to ISO 13344, and to the assessment of toxic hazards in fires according to ISO 13571 is considered in Annex B and Annex C, respectively.


ICS-code 13.220.01
Nederlandse titel Bepaling van bij brand vrijkomende gevaarlijke stoffen onder constante pyrolysecondities - De stationaire buisoven
Engelse titel Controlled equivalence ratio method for the determination of hazardous components of fire effluents - The steady state tube furnace



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