目录简介 | 1 Scope This part of GB 5135 specifies the requirements, test methods, inspection rules as well as marking, packaging, transportation and storage for sprinklers of automatic sprinkler systems. This part is applicable to sprinklers of automatic sprinkler systems. This part is not applicable to early suppression fast response (ESFR) sprinklers, multiple nozzle sprinklers, Water mist nozzles, drencher heads, open-close sprinklers, large-orifice sprinklers and extended coverage (EC) sprinklers. 2 Normative References The following normative documents contain provisions which, through reference in this part of GB 5135, constitute provisions of this part. For dated reference, subsequent amendments (excluding amending errors in the text) to, or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies. GB/T 7306 (All Parts) “Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints Are Made on the Threads” 3 Terms, Definitions, Symbols and Units For the purpose of this part of GB 5135, the following terms and definitions apply. 3.1 Sprinkler
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