标准摘要
[中文适用范围]： 此文件规定了防止在爆炸性气体-空气或蒸汽-空气混合物存在时火焰传播的防爆器的要求。它确立了一致的原则，用于分类、基本结构和使用信息，包括防爆器的标志，并规定了验证安全要求和确定安全使用界限的试验方法。此文件适用于从80 kPa到160 kPa的压力范围以及从-20 °C到+200 °C的温度范围。此文件不适用于以下情况：- 用于保持操作条件在已建立的安全界限内的外部安全相关测量和控制设备；- 自分解倾向较大的爆炸性气体-蒸汽混合物（例如，乙炔）或化学性质不稳定；- 因其特殊性质而不适用于硫化碳的防爆器；- 除气-空气或蒸汽-空气混合物之外的其他混合物的用途（例如，较高的氧-氮比例、氯作为氧化剂）；- 往复活塞内燃机用防爆器试验程序；- 快速动作阀、灭火系统和其他爆炸隔离系统；- 燃气探测器中使用的防爆器（如IEC 60079-29-1和IEC 62990-1所涵盖的）。此版取消并取代了ISO 16852:2016，该版本在技术上进行了修订。此版构成技术修订。与ISO 16852:2016相比，此版包括以下重要的技术变更：a) 调整了相关IEC TC 31的要求；b) 将温度范围的上限从150 °C修改为200 °C，在条件是T0 不大于气体-空气混合物自燃点的80%；c) 因编辑要求更改术语“爆炸组”为“设备组”；d) 对7.3.4和7.3.5中大气条件下以外的防爆器运行条件和要求进行了澄清；e) 对第12条中的使用信息的要求进行了澄清，涉及燃烧时间；f) 在第7.1和14.1中添加了允许条款，可以替代目视检查进行流量试验；g) 添加了一个评估试验结果的流程图作为附录D。 [外文原描述]： ISO/IEC 80079-49:2024 specifies the requirements for flame arresters that prevent flame transmission when explosive gas-air or vapour-air mixtures are present. It establishes uniform principles for the classification, basic construction and information for use, including the marking of flame arresters, and specifies test methods to verify the safety requirements and determine safe limits of use. This document is applicable to pressures ranging from 80 kPa to 160 kPa and temperatures ranging from -20 °C to +200 °C. This document does not apply to the following: - external safety-related measurement and control equipment that might be required to keep the operational conditions within the established safe limits; - flame arresters used for explosive mixtures of vapours and gases, which tend to self-decompose (for example, acetylene) or which are chemically unstable; - flame arresters used for carbon disulfide, due to its special properties; - flame arresters whose intended use is for mixtures other than gas-air or vapour-air mixtures (for example, higher oxygen-nitrogen ratio, chlorine as oxidant); - flame arrester test procedures for reciprocating internal combustion engines; - fast acting valves, extinguishing systems and other explosion isolating systems; - Flame arresters used in gas detectors (those being covered for example, by IEC 60079‑29‑1 and IEC 62990‑1). This edition cancels and replaces ISO 16852:2016, which has been technically revised. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to ISO 16852:2016: a) adaptation of the relevant IEC TC 31 requirements on standards; b) modification of the upper limit of the temperature range from 150 °C to 200 °C under the condition that T0 shall be not larger than 80 % of the auto ignition temperature of the gas-air-mixture; c) change of the term "explosion group" to "equipment group" due to editorial requirements in IEC/TC 31; d) clarification of the conditions and requirements for flame arresters whose intended operating conditions are outside the atmospheric conditions in 7.3.4 and 7.3.5; e) clarification of the requirements on the information for use in Clause 12 f) concerning the burn time; f) addition of a permission to the construction requirements both in 7.1 and 14.1 to substitute visual inspection by performing a flow test; g) addition of a flow chart for the evaluation of test results as Annex D
英文名称Explosive atmospheres - Part 49: Flame arresters - Performance requirements, test methods and limits for use