北京市自来水集团计划从2005年至2007年,利用三年时间改造老旧供水管线150余公里,更换老旧设施8480座。2005年,市自来水集团已投入资金4320多万元,完成了55.9公里老旧供水管线除锈、增加内衬,更换各种老旧闸门、排气门、消火栓2180座。北京市市自来水集团2005年确定了全市30条隐患供水管线,并制定了三年消隐工程计划。2005年已完成9条隐患供水管 Beijing Waterworks Group plans from 2005 to 2007, the use of three years to transform the old water supply pipeline more than 150 kilometers, replacing the old facilities 8480. In 2005, the city water company has invested 43.2 million yuan to complete the 55.9 km old water supply pipe rust, increase lining, replace all kinds of old gates, exhaust valves, fire hydrants 2180 seats. Beijing Municipal Water Supply Group in 2005 identified the city's 30 hidden water supply pipelines, and worked out a three-year blunt project. 2005 has completed 9 hidden pipes for water supply