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球墨铸铁管由于具有强度高（a。＞420MP旬，塑性好（8＞10％）、抗腐蚀性强而在供水、输气管道中大量应用。我们在引进捷克DN12O0mm离心机（二手旧设备）基础上，对内村覆膜砂的工艺技术进行攻关，现已能较大批量地生产出DN1200mm离心球墨铸铁管，铸管质量完全符合ISO2531－91
The ductile iron pipe is widely used in water supply and gas pipelines due to its high strength (a> 420MP, good ductility (8> 10%), strong corrosion resistance.) We introduced the Czech DN12O0mm centrifuge (used equipment) Based on the village of coated sand technology to tackle the problem, is now able to produce large quantities of DN1200mm centrifugal ductile iron pipe, pipe quality in full compliance with ISO2531-91