喷淋管径所带喷头数目探讨（Discussion on the number of nozzles with spray pipe diameter）.doc

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喷淋管径所带喷头数目探讨（Discussion on the number of nozzles with spray pipe diameter）.doc

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喷淋管径所带喷头数目探讨（Discussion on the number of nozzles with spray pipe diameter） The cost of a big engineering pump, Yang Chengshao, is much lower than the cost of piping. Before starting with the spray pump is the usual maintenance or fire, does not increase the number of daily expenses; by in calculation, the general risk level we design calculation of flow is about 25L/s, which is given 18 nozzle flow. Some design personnel according to the provisions of article 8.0.7 of spray rules of the human will the calculation of flow more than 20 or even 64 to calculate the diameter, flow velocity and water loss has no much significance. The 8.0.7 clause of the jet code states that this clause has been changed from mandatory to non mandatory. Table 8.0.7 limits the number of standard nozzles for various diameter pipe controls to ensure system reliability and to maximize hydraulic performance of the system piping. Moreover, spray gauge table 8.0.7 requires only a few nozzles for the distribution pipe, water distribution pipe, the pipe connected to the water distribution pipe (ie water distribution dry pipe) did not require. This must be paid attention to. Through the study of relevant provisions, explanations and terminology, it can be understood that through proper piping to make the network roughly balanced, it is up to the standard requirements of water distribution evenly purposes. This should be the nature and starting point of the specification, rather than simply determining the caliber of the nozzle. Instead, if you only pay attention to spray gauge table 8.0.7 specifications of the number of nozzles, simply apply 1 DN25, 2 DN32, etc., and ignore the entire water distribution network balance calculation, it is not appropriate. It is worth noting that the number of nozzle spray rules specified in table 8.0.7 is suitable for light, the risk according to the standard reference nozzle to water pipes, water pipe, and some colleagues in the design of warehouse dangerous level o