Abstract: According to the domestic and international fire code and project practice experience, this paper discusses several problems such as fire hydrant system, fire pump and fire pump, and puts forward design parameters. Keywords: fire hydrant, fire hydrant, water supply system, booster pump, fire pump The author, based on China and the United States, fire design specifications and engineering practice, to discuss several issues in the fire hydrant water supply system in order to jointly promote the development of the firefighting cause, please comment Correction 1. Hydrant water supply system 1.1 Hydrant hydrant pressure and system partitioning Our country "building products amethyst di Ding? SPAN lang = EN-US> GBJ16-87 revised edition (hereinafter referred to as" build regulations ") 8.6.2 and" Fire Code for High-rise Civil Building Design "GB50045-95 (hereinafter referred to as" high regulation ") Article Hydrostatic Hydrant Hydrant Hydrant No more than 0.8Mpa, when greater than 0.8Mpa should be taken to partition the water supply system. The United States NFPA14 "StandardfortheInstallationofanpipeandHoseSystem" (1996Editon) provides that the pressure at any point in the system can not exceed 2.41Mpa at any time, when the plug at the static pressure exceeds 1.21Mpa should be set decompression device. China Hydrant Hydrostatic pressure should not exceed 0.80Mpa is the system partition value. Hydrant static pressure requirements are given in view of the quality of hydrants - bearing pressure. China's "indoor fire hydrant" GB3445-82 provisions of the indoor fire hydrant working pressure of 1.60Mpa, test pressure of 2.40Mpa, far greater than the static pressure zone value of 0.80Mpa, so our system can be properly increased partition values. There are two values ​​in the United States system to determine the partition, one with China's equivalent Hydrant static pressure does not exceed 1.21Mpa; Second, any point of the system pressure at any time can not exceed 2.41Mpa, which is the system must be in series partition requirements. According to the survey, a lot of buildings in our country have a height of 60m-70m. The height of the building, together with the height of the basement and the height of the roof water tank, is often larger than 80m. As a result, the hydrant system is zoned to cause the fire hydrant system equipment and piping to increase Investment increased. Properly increasing this value or drawing on U.S. standards can save you a lot of money and simplify your system. Recommended static pressure partition value 1.0Mpa-1.2Mpa, system serialization partition value 2.40Mpa. This can take full advantage of the fire hydrant bearing pressure, but also to save money.
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