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Specifies a range of jointing methods for connecting low alloy steel tubes and steel tubes and fittings for use with aqueous liquids
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human interaction in the transfer of information between systems
Fire detection and alarm systems for buildings - Specification for optical beam smoke detectors Ingestion-build-83346 Specifies a range of jointingSummary BS 5839 5: 1988, a part of the BS 5839 series, specifies requirements, test methods and performance criteria for fire detectors utilizing attenuation of an optical beam for the detection of smoke aerosols. An optical beam detector may or may not include an external reflector but is distinct from a point detector in that there is no integral mechanical connection to define or adjust the optical path length. This specification covers beam
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