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铸铁管是给水工程中输配水管道的主要管材之一,按铸铁管的材质可分为灰口铸铁管和延性铸铁管,延性铸铁管可分为球墨铸铁管和铸态球墨铸铁管(未经退火的球墨铸铁管)。由于灰口铸铁管的质量不稳定,敷设的管道爆管事故较多,因此近年来对球墨铸铁管的开发较快,现已形成约7万吨的年生产能力,并开始应用在给水管道工程中。球墨铸铁管在国外已有几十年历史,而国内刚起步,且缺乏这方面相应的标准规范。为
Cast iron pipe is one of the main pipes in water supply and distribution pipeline. According to the material of cast iron pipe, it can be divided into gray cast iron pipe and ductile cast iron pipe. Ductile cast iron pipe can be divided into ductile iron pipe and cast ductile iron pipe Annealed ductile iron pipe). Due to the unstable quality of gray cast iron pipes and the more pipe burst accidents caused by laying pipes, the development of ductile iron pipes has been developed rapidly in recent years and an annual production capacity of about 70,000 tons has been formed and started to be applied to water supply pipeline projects in. Ductile iron pipe in foreign countries have been for decades, but the domestic just started, and the lack of corresponding standards in this area. for