标准编号：ISO 7240-22:2007
中文名称：火灾探测与报警系统 第22部分：管道用烟雾探测设备
英文名称：Fire detection and alarm systems — Part 22: Smoke-detection equipment for ducts
发布日期：2007-05
标准范围
This part of ISO 7240 specifies requirements, test methods and performance criteria for smoke-detectionequipment for ducts (s.d.e.d.) for use in fire-detection and fire alarm systems installed in buildings; seeISO 7240-1.The s.d.e.d. samples the air from a duct and detects smoke in the sample.NOTE 1 A common method of operation is to use differential pressure arising from airflow in the duct.The s.d.e.d. can use smoke detectors complying with ISO 7240-7 or other detectors complying with testsspecified in this part of ISO 7240.A common application for s.d.e.d. is to detect visible smoke, for which detectors using scattered light ortransmitted light can be more suitable. However, requirements for detectors using ionization are also includedin this part of ISO 7240 for use in applications where detection of less visible fire aerosols is desired.For the testing of other types of smoke detectors or smoke detectors working on different principles, this partof ISO 7240 can be used for guidance. Smoke detectors with special characteristics, developed for specificrisks, are not covered.NOTE 2 Certain types of detectors contain radioactive materials. The national requirements for radiation protectiondiffer from country to country and are not specified in this part of ISO 7240.
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