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一、概况自1980年5月为北京首钢生产φ1200mm预应力钢筋混凝土低压管后,接着为天津、秦皇岛、大庆、大同、青岛、大连、烟台、武汉等地生产了φ600mm～φ2000mm的各种规格和不同要求的预应力低压管共50多公厘。为这些省市的市政和水利建设提供了管材,使我厂的预应力管的生产不但增加了品种,且由单一的内压给水管发展到外压输水管。
I. Overview After producing φ1200mm pre-stressed reinforced concrete low-pressure pipes for Beijing Shougang in May 1980, it has produced various specifications of φ600mm～φ2000mm for Tianjin, Qinhuangdao, Daqing, Datong, Qingdao, Dalian, Yantai, and Wuhan. Different requirements of the prestressed low pressure pipe total more than 50 mm. Providing pipe for municipal and water conservancy construction in these provinces and cities has enabled the production of prestressed pipes in our factory not only to increase the variety, but also to develop a single internal pressure water supply pipe to the external pressure water delivery pipe.