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采用衬覆膜树脂砂的热模法工艺生产大管径离心球墨铸铁管， 产品性能完全符合ＩＳＯ２５３１－９１（Ｅ）标准要求，产量达到月产 ２０００吨水平。研制中对碳当量（ＣＥ）控制，强化孕育处理工艺和内喷水强制冷却以防止承口处球化衰退等技术问题进行了探讨并采取了相应措施。
The production of large diameter centrifugal ductile iron pipe by the hot-mold process of lining resin sand has the performance in full accordance with the standard of ISO2531-91 (E), and the output reaches the level of 2000 tons per month. Development of carbon equivalent (CE) control, strengthen the birth control process and forced cooling water spray to prevent the recess decline and other technical issues were discussed and took corresponding measures.