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  • ISO 247-1990 - 中外标准 - - 1990/11 - 作废
    The two methods are applicable to raw, compounded and vulcanized rubbers of the families described in ISO 1629. The principle of method A consists in heating a weighed test portion in a crucible over a gas burner, followed by volatilization of the decomposition products and transfer of the crucible to a muffle furnace. The crucible is heated until all the carbonaceous matter has been burnt off and constant mass is attained. In method B a weighed test portion is heated in a crucible in the presence of sulfuric acid, first by means of a gas burner and then in a muffle furnace as in method A. Platinum crucibles shall be used for ashing fluorine-containing and lithium-polymerized rubbers. Cancels and replaces the second edition ISO 247:1978, which contains three methods of determination.
  • ISO 4249-2-1990 - 中外标准 - - 1990/2 - 现行
    Tabulates the correlation between load index and tyre load-carrying capacity (table 1), between speed symbol and speed category (table 2), the maximum tyre load capacities (table 3), and the variation of maximum load capacities of tyres according to maximum speed of motorcycle (table 4). This second edition cancels and replaces the first edition (1983).
    机动脚踏车额定值运载工具轮胎道路车辆车轮充气轮胎规范轮子荷载能力Load capacityMotor cyclesMotorcyclesPneumatic tyresRatingsRoad vehiclesSpecificationsTyresVehiclesWheels
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